service manual instructions for continued airworthiness
Contents
1. FILL PLUG Main Gear Shock Strut Figure 5 4 Assembl Hev E 42 1002554 SERVICE MANUAL FOR 8000 FLOATS 330H 9 3g H9 SNO 179881 3315 3AOHH2 INCI ONIMY3H dar 7 Lact ONY SOIR 3802 SNS Sp i gt ASM vd te daie3d 3i ogHz amd ONIH 72 da SEBE MAJHA SSH 031774 astodHa dna SHIHY2B aaol nez ONY TENI BNI WS GLARE fi 3543890 SOSH Mas TELF 20 1510 Was EXPEA JHH 418 Bx FIGURE 5 5 ASSEMBLY MAIN GEAR AND BRAKE Refer to Parts Manual for complete parts list Hev E 43 1002554 SERVICE MANUAL FOR 8000 FLOATS ORIENT SLIDE BLOCK As SHOH MS287 75 275 rh RING MSZ25775 220 I RING TROLLEY AXLE E 5 x A E de me o RGLLER DOWN STOP g 1 J f pu j SLIDE BLOCK of SEE INSET MSZBTTS PPU CY RING 528775 316 2 RING WIPER NYLON TROLLEY BLOCH FIGURE 5 6 ASSEMBLY NOSE GEAR SYSTEM Hev E 44 1002554 SERVICE MANUAL FOR 8000 FLOATS 1002554 45 Hev E SERVICE MANUAL FOR 8000 FLOATS 6 WATER RUDDER RETRACTION AND STEERING SYSTEM Description The water rudder retract system is manually operated by a lever through a system of cables and pulleys oteering is directed from the aircraft rudder steering system Adjustment Rigging of the water rudder steering cables is2. SEALANT SPACER 040 21 159 DIA 1009 C SUNK USE AN426AD5 C SUNK RIVETS FIGURE 7 5 TYPICAL REPAIR BOTTOM SKIN TO KEEL INSTRUCTIONS 1 2 3 4 5 6 Remove original damaged skin from extrusion Remove caulking from groove of extrusion Apply sealant in groove Be sure to use plenty of SEALANT Insert repair skin into extrusion Install spacer between repair skin and extrusion Drill and countersink holes and rivet into place 52 Hev E SERVICE MANUAL FOR 8000 FLOATS e lt Cas lt gw m oso z x GO mm x S LA e _ gts VS 4 ome 9 awm mu oma s s m s 9 w s w an f lt p 1 c FIGURE 7 6 PICAL REPAIR BOTTOM SKIN TO KEEL ALT INSTRUCTIONS TY ALTERNATE METHOD 1 Remove original damaged skin leaving approximately 1 1 2 of skin protruding from extrusion 3 Remove caulking from groove in extrusion 3 Install sealant in groove Be sure to use plenty of SEALANT 4 Insert repair skin in groove approximately 1 4 5 Layout hole pattern drill de chip seal and rivet 1002554 53 SERVICE MANUAL FOR 8000 FLOATS 9 REPAIRING FLOAT HULL SKINS All extrusions in the float hull are formed 6061 T6 aluminum alloy Extrusions have channels on both sides which the hull skins are bonded to All extrusions may be repaired by splicing as shown in figure 8 1 and 8 2 or capped a
3. The correct level is best set by draining and refilling with the correct quantity of fluid 1140 ml This should be done with the oleo removed from the float which process is outlined in Section 5 2 CAUTION Release air pressure and remove air valve before attempting to service oleo After filling refit valve and cap then pressurize to 210 psi Note Use only MIL H 5606 hydraulic fluid Air Pressure The correct air pressure is 210 psi 10 psi on a fully extended oleo no load or it can be inflated to approximately 5 6 inches on an unloaded aircraft while sitting static on level ground Seals Seals should be replaced whenever the oleo is disassembled or leaking CAUTION Release air pressure and remove air valve before attempting to disassemble oleo The seals are standard O rings whose part numbers are depicted in figure 5 4 5 1 ADJUSTMENT TEST NOSE GEAR Adjustment of actuator stroke is provided at the ends of the piston rods 1002554 15 Hev E SERVICE MANUAL FOR 8000 FLOATS The length of the nose gear rod is adjusted such that the over center knuckle brass rollers just bottom out on the down side and the piston just bottoms out on the mounting flange The up stops nests in the up stop pin See figure 5 6 for location and assembly Nose gear proximity switches are located on clips that are mounted on the outer cylinder body one on each end The most forward switch is for the gear down lights and most aft is fo
4. amp DISASSEMBLY 8 9 9 SERVICE SUMEIDUEE au e E dos pedi a Aes a eee dira 9 5 4 HYDRAULIC PUMP SYSTEM DISASSEMBLY AND SERVICE 13 6 WATER RUDDER RETRACTION AND STEERING SYSTEM 22 7 REPAIRING FLOAT HULL 5 5 22 8 REPAIRING FLOAT HULL 23 9 REPAIRING FLOAT HULL 5 5 30 1002554 5 Hev E SERVICE MANUAL FOR 8000 FLOATS This page blank 1002554 6 Hev E SERVICE MANUAL FOR 8000 FLOATS Caravan HODEL 208 FLOATPLANE 1002554 7 RevE SERVICE MANUAL FOR 8000 FLOATS This page blank INTRODUCTION 1002554 8 Hev E SERVICE MANUAL FOR 8000 FLOATS This manual describes the general servicing and maintenance for the Model 8000 float including hull and landing gear For services and repairs not covered by this manual contact the factory The service products referred to throughout this manual are described by their trade name and may be purchased from the factory Parts Department To contact Wipaire for service assistance or parts sales call or write Wipaire Inc Telephone Float Dept 651 286 7014 Aircraft Parts 651 306 0459 Fax 651 306 0666 Website www wipaire com 1 GENERAL The model 8000 seaplane or amphibious float is an all aluminum constructed float with watertight compartments The actual displacement in fresh wa
5. 2 MANUFACTURERS WIPLINE FLOATS amp SKIS gt e SPECIALISTS IN AIRCRAFT MODIFICATION gt 7 LJ 1700 Henry Avenue Fleming Field E P pe 7 227 WIPAIRE INC South St Paul MN 55075 yid 651 451 1205 WIPLINE MODEL 8000 FLOAT SERVICE MANUAL AND INSTRUCTIONS FOR CONTINUED AIRWORTHINESS REVISED May 2008 CONTACT WIPAIRE SERVICE DEPARTMENT OR CHECK OUR WEBSITE AT WWW WIPAIRE COM FOR LATEST REVISIONS SERVICE MANUAL FOR 8000 FLOATS This page Blank 1002554 2 Hev E SERVICE MANUAL FOR 8000 FLOATS LOG OF REVISIONS PAGES DESCRIPTION DATE Revised Aircraft jacking position oie s 12 18 Added greasing zerk to tasks and zo changed drawing Added an inspection time limit and 4 18 06 tolerances for the Nose Block Track wear 2 22 Made several additions to the l L8 07 inspection checklist 1002554 3 Hev E SERVICE MANUAL FOR 8000 FLOATS This page blank 1002554 4 Hev E SERVICE MANUAL FOR 8000 FLOATS TABLE OF CONTENTS SECTION PAGE 1 GENERAL 1 2 FLOAT HULL 2 3 FLOAT HANDLING JACKING AND AIRCRAFT 3 4 AMPHIBIAN LANDING GEAR SYSTEM OPERATION amp MAINTENANCE 3 5 MAIN AND NOSE GEAR OPERATION REMOVAL AND SERVICE 5 Sl ADJUSTMENT EST sentra Ida eet hae ee hes wes 7 5 2 AND NOSE GEAR REMOVAL
6. 5 6 for details REMOVAL OF NOSE GEAR BOX Remove bolts securing forward box from nose bulkhead Remove bolts securing aft box from bulkhead 2 Slide box out from front of float Note Sealant will have to be cut for removal and replaced when installing REMOVAL OF LOWER NOSE GEAR FROM PIVOT BLOCK With weight off of the nose wheel remove 2 bolts on plate on aft side of pivot block Remove spring and detent piston Nose fork assembly will drop down from pivot block 1002554 24 RevE SERVICE MANUAL FOR 8000 FLOATS 5 9 SERVICE SCHEDULE As coded in the Inspection Time Limits chart in this section there are items to be checked each 25 50 100 and 200 hours Also there are notes on special items which may require servicing at more frequent intervals When conducting an inspection at 25 hours all items marked for 25 hours would be accomplished When conducting an inspection at 50 hours the 25 and 50 hour items would be accomplished When conducting an inspection at 100 hours the 25 50 and 100 hour items would be accomplished When conducting an inspection at 200 hours the 25 50 100 and 200 hour items would be accomplished A complete inspection Annual Inspection would include all 25 50 100 200 hour items Below is a list of recommended lubricants and protection products when servicing float hull amphibious components This lists products used by Wipaire during assembly of the floats There may be e
7. FOR 8000 FLOATS ORIGINAL SKIN BONDED TO INSIDE OF EXTRUSION eena nm mm a q o ee G G REMOVE BY GRINDING AND FILING OUTSIDE OF EXTRUSION TO THIS SHAPE TO RECEIVE NEW OUTSIDE CAP k 100 Typ USE AN426AD5 C SUNK RIVETS 21 159 DIA 1000 C SUNK 040 SPACER NEW CAP PRECUT FROM FACTORY FIGURE 8 3 TYPICAL CAP SPLICE TO KEEL Layout new repair cap on damaged extrusion 2 Remove outside of damaged extrusion by filing or grinding to inside shape of repair j cap 3 Match drill or layout and drill hole pattern as shown 4 Rivet outside cap and spacer to existing inside extrusion 5 Apply keel wear strip with any good 2 part epoxy Hev E 57 1002554
8. and four 4 hydraulic actuators one 1 for each gear The hydraulic pumps are located in fuselage aft of cockpit and the hydraulic actuators are located adjacent to each gear Hydraulic system fluid level should be checked periodically by viewing the sight glass for fluid level in the upper one third of the range If fluid is low fill with MIL H 5606 or equivalent Filters are installed on pickup tube inside of hydraulic reservoirs Clean every 100 hours Landing gear operation is initiated by movement of the landing gear handle When the handle is repositioned hydraulic pressure in the system will drop and pressure switches will automatically turn on the hydraulic pump motors to maintain operating pressure in the system When the gear cycle is completed the pump will automatically shut off If the pressure in the system drops to a preset value the pressure switches turn the pump motors back on and build up the pressure to the limit again Eight 8 position indicator lights four 4 gear UP and four 4 gear DOWN are provided to show landing gear position Two 2 additional indicator lights show when the landing gear pump motors are operating LANDING GEAR HANDLE The landing gear handle controls a hydraulic selector valve within the selector head in the instrument panel and has two 2 positions UP and DOWN LAND which give a mechanical indication of the gear position selected From either position the handle must be pulled out to clear a
9. be broken from an extrusion for a long distance the caulking material must first be removed from the exterior crack Then heat the extrusion with a propane torch until the bond starts to loosen Caution must be taken not to heat and loosen bonds not needing replacement 1002554 46 Hev E SERVICE MANUAL FOR 8000 FLOATS 8 REPAIRING FLOAT HULL EXTRUSIONS All extrusions in the float hull are formed 6061 T6 aluminum alloy Extrusions have channels on both sides which the hull skins are bonded to All extrusions may be repaired by splicing as shown in figure 8 1 and 8 2 or capped as shown in figure 8 3 Splicing normally is done when both sides of an extrusion are damaged Capping is done when only the outside of an extrusion is damaged such as the main keel during gear up landings on pavement Capping also is done when the original skin is still bonded to the inside of the extrusion Sections of extrusion for splicing or capping may be purchased from Wipaire in any length needed Stub skins can also be bonded on extrusion sections if desired to simplify the repair There are many ways to repair Wipline floats and each method depends on the degree and location of the damage The following figures are examples of some repairs For additional help contact the Wipline float factory at 651 451 1205 1002554 47 Hev E SERVICE MANUAL FOR 8000 FLOATS PATCH HOLE IN SKIN TRIM HOLE TO THESE DIMENSIONS SEALANT AROUND PATCH EDGE Us
10. detent before it can be repositioned INDICATOR LIGHTS Ten 10 indicator lights are mounted on the landing gear control unit adjacent to the landing gear handle Four 4 blue indicator lights labeled NOSE and MAIN left hand lights for the left float and right hand lights for the right float show by their illumination that the landing gear is up and locked The four 4 amber indicator lights labeled NOSE and MAIN left hand lights for the let float and right hand lights for the right float are illuminated when the landing gear is down and locked Neither set of lights is illuminated when the landing gear is in transit Two 2 red indicator lights labeled PUMP ON 1 and 2 illuminate when current is supplied to the landing gear motors If the motors continue running during flight or on and off repeatedly the motors should be shut off by pulling AMPHIBIAN PUMP 1 AND AMPHIBIAN PUMP 2 circuit breakers since continual running of the motors can result in premature motor failure Prior to landing the circuit breakers should be pushed in to reactivate the circuits Troubleshoot hydraulic problem per section 5 4 LANDING GEAR OPERATION To retract or extend the landing gear pull out on the landing gear handle and move it to the desired position When the handle is positioned pressure on the hydraulic system reduces to where the hydraulic motors automatically turn on The motors power the hydraulic pumps and actuate the gear actuator for each g
11. pins for presence rigging On the aircraft remove clean inspect and grease the aux finlets on the horizontal stabilizer general condition Solenoids inspect wiring mounting and general condition Pressure Switches inspect wiring mounting and general condition Electrical Pump and indicator light wiring inspect oystem for chafing broken or loose terminals and Pump Motors inspect wiring mounting and general condition Landing Inspection and servicing nose gear Gold and white track and block Gear tracks clean and use grease Black track oystems and block clean and dry or clean and wipe with silicone spray Nose Gear Box Block Tracks Check side play 3 32 to 1 16 measured at slide route for wear inches max tolerance 050 inches or less wear tolerance m 1002554 28 Rev INSPECTION TIME LIMITS amp CHECKLIST INSTRUCTIONS PROCEEDURES HOURLY LIMITS MECHANIC eee s epe ter N ivot blocks and forks i t ere L A Nose amp main wheel bearing grease Zerks fluid level 5806 fluid level Mil H 5606 tezi and tire inspect for wear pressure condition 45lbs 5lbs Brake assemblies inspect for wear corrosion leakage Hydraulic fluid screen clean and inspect NOTE If floats sit for extended periods of time l e If removed during winter months screen should be cleaned before putting floats back into se
12. that retracts last b Replace pressure switch 6 PROBLEM Slow gear operation cycle considerably longer than 30 seconds PROBABLE CAUSE a Plugged oil screen b Poor electrical connection to motor c Poor motor d Worn pump gears REMEDY a Clean intake screen located inside reservoir tank Connect motor direct to 24 volt source and note its operation if good wire connection is bad if operation poor motor needs overhaul c Covered in b above d Replace pump 7 PROBLEM Circuit breaker pops during cycle PROBABLE CAUSE a Wire connections bad or corroded b Bad motor brushes c Bad circuit breaker REMEDY a Clean and protect terminal with grease b Overhaul motor c Replace circuit breaker 1002554 98 Rev E SERVICE MANUAL FOR 8000 FLOATS SCHEMATIC GEAR UP LIGHTS E Senn vn PUMP OPERATING LiGHTS O e GEAR DOWN LIGHTS LANDING GEAR HANDLE DO agg Tata a a a a ara P F F O w v a d p R Ros on Moe RON M e a s sss p 2 s ata n n u q n 4 LEFT NOSE GEAR ACTUATOR PUMP 2 CIRCUIT BREAKER ey PUMP 1 CIRCUIT BREAKER LANDING GEAR MOTORS HYORAULIC PUMPS AND RELIEF VALVE LEFT MAIN GEAR ACTUATOR selene te Eg 1002554 HYDRAULIC SYSTEM L EMERGENCY EXTEND HANDLE HAND PUMP id mia A
13. z DT 2 1 EN 2 tag Og pe P FAKE 222222 2 GEAR SELECTOR ke 2 VALVE 2 2 r 4 2 22 RIGHT NOSE GEAR ACTUATOR CONDITION LANDING GEAR IN DOWN POSITION RIGHT MAIN GEAR ACTUATOR CODE uud PUMP PRESSURE PUMP RETURN GEAR DOWN PRESSURE GEAR UP RETURNI GEAR UP PRESSURE GEAR DOWN RETURN Figure 5 1 39 Hev E SERVICE MANUAL FOR 8000 FLOATS SCHEMATIC ELECTRICAL SYSTEM LEFT FLUAT RIGHT FLOAT Q Q BUSS BAR Q UL CAR UP GEAR DOWN Li R SV GE 6 NOSE GEAR E GE 7 L UP SW ST E y UP sv MAIN GEAR 63 GE 5 MAIN GEAR L ODN SY ODN SV HARI ALL GROUND YIRES GC9 Figure 5 2 1002554 40 Rev E SERVICE MANUAL FOR 8000 FLOATS E oh anm zi IH o zo JANILIT3 3503439 0432 joviHuv ES ME I Odd 23d JH 3105 did 1793 ONIS A 14351331 30175 ASOT Nac SMM aos 125 x0 MOOT ef FIGURE 5 3 ASSEMBLY MAIN GEAR RETRACTION SYSTEM RevE 41 1002554 SERVICE MANUAL FOR 8000 FLOATS AN6227 14 O RING LOWER CAP 4115B01TP037 T SEAL PISTON 4115B001TP037 T SEAL OUTSIDE RETAINER PISTON _ OUTER CYLINDER 4115B001TR035 T SEAL INSIDE RETAINER WIRED AAC u f NN JE METERING TUBE NNER CYLINDER gt RETAINER CAUTION REMOVE PRESSURE b 0 BEFORE DIASSEMBLY k 4115B001TR035 T SEAL AN62278 9
14. ED AIRCRAFT TECHNICIONS 14 connect brake lines and bleed for airbubbles 0 0 15 Install main gear belly plate and fairings Y 16 Remove front strut fittings Y 17 Install pilot and co pilot step assemblies Y 18 Install tail cone and tail hatch cover 19 Install lower LT cowling Y 20 Install all nose gear fitings Y Y 21 Install all floor plates and carpet Y 22 Install aft bulkhead Y Y 23 Install any seats previously removed Y 24 Remove aircraft from hoist amp add air to tires as required 25 Install wing root fairings Y 1002554 34 Hev E SERVICE MANUAL FOR 8000 FLOATS mmm CESSNA 208 FLOAT RE INSTALL INSTRUCTIONS PROCEEDURES THIS IS INTENDED AS A GENERAL GUIDE EACH INSTALLATION MAY HAVE ha SUBTLE DIFFERENCES ALWAYS USE THE INSTALLATION DRAWINGS AS THE FINAL REFERENCE ALL WORK SHOULD BE DONE BY CERTIFIED AIRCRAFT TECHNICIONS 1 Remove the nose and main gear fairings and the belly plate BENE 2 Remove wing gap strips and the tail cover nn 3 Install the finlets and seal BENE 4 Remove aft panel inspection covers for hydraulic pump access and cables BENE 5 Remove pilot and co pilot steps 6 Install front strut fittings DN DD E 7 Disconnect brake lines and cap 8 Cut tie wrap from pump circuit breakers 9 Remove fuel before lifting aircraft BENE 10 Tie ropes from tie down rings Connect lifting bar to ho
15. If off aircraft re grease bolts and return Spreader Bars inspect for loose screws and cracks amp seal between fairing and side skin Insp fairings X for cracking and loose screws On the aircraft and floats re coat exposed hardware with suitable X X coating for corrosion protection Closely inspect for wrinkled metal amp cracked flanges watch closely bulk X X heads 9 21 After hardware inspection coat with anti corrosion grease to X X excessive wear and corrosion under protect nutplates Pumper Tube Installation inspect for condition security routing of hoses X X 1002554 28 Hev E Disassemble and grease the flying wire clevis bolts pins Float structure interior pull up baggage floors and inspect bulkheads Baggage compartment covers and seals inspect for condition security operation SERVICE MANUAL FOR 8000 FLOATS INSPECTION TIME LIMITS amp CHECKLIST INSTRUCTIONS PROCEEDURES Water rudder boots inspect for cuts Water rudder blades and posts tears and condition inspect for damage security of attachment corrosion paint X X rigging Check post bolts and bushings and lube with LPS 2 Water rudder steering and retract Check top and bottom rollers for systems inspect the following cables for rotation and lube with LPS 2 or broken wire fittings for cable slippage similar product X X cracks and distortion cable pulleys for freedom of rotation and cable guard
16. accomplished by centering the airplane rudder and adjusting the turnbuckles such that both rudders trail with the float center line Cables should be tensioned to 10 pounds 5 psi Retraction cables should be rigged such that the top of the rudder blade is against the rudder stop on the rudder posts in the up position and that the cables are just slack in the down position Service Schedule Cables inspect for fraying annually Pulleys inspect and lubricate annually 7 REPAIRING FLOAT HULL SKINS The float hull is manufactured from the following aluminum alloys Top skins and side skins are 032 thick 6061 16 the bottom skin is 040 thick 6061 16 the nose bulkhead is 100 thick 6061 16 all remaining forward bulkheads are 032 thick 6061 16 The aft wheel well bulkhead is 050 thick 6061 16 the afterbody skin is 032 thick 6061 16 all afterbody bulkheads are 040 thick 6061 16 Damage to the skins may be repaired per Figures 7 1 7 2 7 3 or any acceptable repair method listed in FAA Advisory Circular 43 13 1A Any float hull skin or part thereof can be purchased from Wipaire to aid in repair To simplify repairs the skins can be ordered precut to shape All outside hull skins are bonded to the extrusions with a special heat pressure 3M adhesive This bond adheres skins to the inside of all extrusions okins may be reattached to extrusions by methods shown in figures in 7 4 7 5 and 7 6 If the skin bond must
17. ain gear up and down lock hooks for proper X X engagement Inspect nose gear trolley for proper travel Inspect nose gear for excessive play in the down position extension amp retraction Nose and main wheel bearings disassemble Ue cun recommended water resistant and inspect grease 1002554 36 Hev E SERVICE MANUAL FOR 8000 FLOATS CESSNA 208 FLOAT REMOVAL INSTRUCTIONS PROCEEDURES MECHANIC THIS IS INTENDED AS A GENERAL GUIDE EACH INSTALLATION MAY HAVE bawa ls SUBTLE DIFFERENCES ALWAYS USE THE INSTALLATION DRAWINGS AS THE FINAL REFERENCE ALL WORK SHOULD BE DONE BY CERTIFIED AIRCRAFT TECHNICIONS 1 Connect the lifting bar to the hoist and position aircraft underneath o 2 Remove wing gap strips 3 Inspect aircraft lifting rings for proper assembly and installation before connectin itting bar to the aircraft Mete munem T while liftinc 5 Lower aircraft so wheels just touch and relieve hydraulic pressure before j Pulling pump circuit breakers Install tie wrap to shank for safet 6 6 Remove from aircraft gt s oo C ee legJel l e e f e from aircraft 6 Remove from aircraft a o Nose gear cover plate II IT L S _ y oO AA Steering bungee from nose gear attach Front flying wire fitting o Strut fairings and belly plate DO DA Tail hatch cover amp tail cone if needed Rear cargo struts and step assembly O O Auxiliary fi
18. ches forward of down lock position This must be accomplished to remove the top oleo bolt In order to remove the lower bolt it is necessary to remove the wheel on the head side of the bolt Shock Strut Servicing NOTE Be sure pressure from gas and fluid have been release before starting to disassemble the strut 1 Disassemble the strut removing both end caps taking apart the gland section and metering pin so the parts can be easily inspected for wear and replacement parts can be added 7 4 d a d M 2 ATI HEY c vw x 5 I M 4 A 4 E 2 Inspect all parts carefully after cleaning for wear and scoring especially the piston gland section and the inside of the outer cylinder Also make sure to check the bushings in the end caps for wear and security 3 The metering tube does not need to be taken apart form the end cap of the inside cylinder unless extensive cleaning is desired If it is disassembled a Toreturn the metering tube height and condition to factory preset first apply blue lock Tite to the threads of the inner end cap threads that hold the metering pin for added security until next removal 1002554 18 Hev E SERVICE MANUAL FOR 8000 FLOATS b The metering pin is threaded until the measurement from the floor of the inside of the end cap to the end of the inserted metering tube is 12 037 inches if the new T seals are being used and 11 937 inches if
19. e AN4S6 AD4 Rivets 70 FIGURE 7 1 TYPICAL SKIN REPAIR Trim hole as shown by dotted line Patch material to be at least same thickness as original skin Prime all bare surfaces Seal between patch and skin Rivet in place s I s 1002554 48 Hev E SERVICE MANUAL FOR 8000 FLOATS SEALANT AROUND PATCH Max Use AN470 og AN456 AD4 Rivets FIGURE 7 2 TYPICAL SKIN REPAIR 1002554 49 Hev E SERVICE MANUAL FOR 8000 FLOATS 2 0 Max SEALANT AROUND Use AN470 oz 456 AD4 Rivers PATCH 4 20 Q 4 o o D Use AN470 or AN456 AD4 Rivets FIGURE 7 3 TYPICAL SKIN REPAIR 1002554 90 Rev E SERVICE MANUAL FOR 8000 FLOATS Ch gt rr e UT C ro rei PP je cm cm A gt gt oa C m e lt A lt tri Ch PE ea lt gt c O gt m D ed gt pri C CI cn A T NOISNULA KSAT 100 NIAS 9190 FIGURE 7 4 TYPICAL REPAIR BOTTOM SKIN TO KEEL INSTRUCTIONS Preferred method Remove original damaged skin cut flush with extrusion Remove caulking from groove of extrusion Apply sealant in groove Be sure to use plenty of sealant Insert repair skin into extrusion Drill and countersink holes and rivet into place 1002554 91 Rev E SERVICE MANUAL FOR 8000 FLOATS REPAIR SKIN EXISTING SKIN 1002554
20. e of between 500 and 1000 psi is maintained in the supply line When the pressure falls below 500 psi the pressure switch activates the pump solenoid providing power to the pump When the pressure reaches 1000 psi the pressure switch deactivates the solenoid and the pump motor stops Figure 5 2 shows the electrical schematic of the system A check valve on the output side of the pump retains pressure in the system while the pump is off The pump has an internal relief valve which directs oil back to the pump reservoir when the line pressure exceeds 1200 psi The system also has an internal relief valve to protect against thermal expansion when line pressure exceeds 1900 psi A cockpit mounted control valve accomplishes the selection of gear up or gear down Each float gear has individual indicator lights on the control valve allowing the pilot to confirm that each gear has fully retracted or extended An emergency hand pump is provided in case of total electric pump failure or loss of fluid The reservoir has additional hydraulic fluid available only to the hand pump The main gear is mechanically locked in both up and down positions Locking and unlocking is done utilizing a small amount of lost motion of the actuator rod Retraction takes place when pressure is exerted on the actuator piston driving the collar along the slide tube The lock is tripped when the follower slides up the contoured track in the actuator as shown in figure 5 3 A rev
21. ear During operation of the landing gear motors the PUMP ON 1 and 2 indicator lights are 1002554 12 Hev E illuminated When the gear cycle is completed pressure builds up in the hydraulic system and automatically shuts off the hydraulic motors Each gear operates independently of the other and therefore the position lights illuminate at various times EMERGENCY PUMP HANDLE An emergency hand pump is located on the floor between the front seats in the event the normal hydraulic system fails This hand pump may be used to retract or extend the land gear To actuate the hand pump pull out the handle Prior to utilizing the emergency hand pump pull the AMPHIB PUMP 1 and 2 circuit breakers to deactivate the electric hydraulic pumps Select UP and DOWN using the normal landing gear selector handle Place the emergency hand pump handle in the pump and pump up and down When a gear reaches the selected position its indicator light will illuminate After all four 4 gears are in the selected position there is a noted increase in resistance of hand pump operation 1002554 13 Hev E SERVICE MANUAL FOR 8000 FLOATS 5 MAIN AND NOSE GEAR OPERATION REMOVAL AND SERVICE DESCRIPTION AND OPERATION Retraction and extension of the main and nose landing gear is effected by a hydraulic actuation system shown schematically in figure 5 3 The gear system is hydraulically actuated and driven by two hydraulic pumps located in the Aft fuselage A pressur
22. eering cables in the tail of the aircraft j 24 Route and rig the steering cables amp water rudder retract cables 25 Install step struts Pf 26 Install break lines and bleed for air bubbles nn 27 Install elevator down spring 28 Install belly plate and fairings for main gear 29 Install tail inspection cover cowlings and wing gap strips nn 30 Inflate tires to 45 lbs 5 lbs 31 Remove aircraft from stands Check for proper main oleo extension section 5 32 Check aircraft placards against the drawings for accuracy nn 33 Plug nose leg fairing holes and pilot and co pilot step holes 34 Make logbook entry amp check for proper placarding nn 1002554 39 Rev E DESCRIPTION AND OPERATION 1 PROBLEM Powerpack does not run after gear selection PROBABLE CAUSE Circuit breaker has failed Pressure switch not pulling in at low cut in Solenoid switch not pulling in Faulty pump motor Motor not properly grounded p O O O VERIFICATION AND REMEDY a Reset circuit breaker Short across pressure switch leads and see if motor runs If motor operates replace pressure switch Short across solenoid pressure switch leads and see if motor runs If motor operates replace solenoid pressure switch d lf c above does not produce results and it is verified that voltage was actually applied to motor it can be assumed motor is bad or not properly grounded e Check m
23. emove hydraulic lines Remove end cap from end of cylinder Drain fluid Remove forward end of cylinder from bulkhead flange Remove cylinder support ring from bulkhead NOTE Piston to be in the up position for cylinder removal Remove cylinder from piston and up through top float inspection cover To remove piston remove top inspection cover on top forward end of gear tunnel accessible from top float inspection cover forward of step Pull back piston to expose top of carriage in center of access cover Remove 25 dia retention bolt Remove piston by pulling aft See figure 5 3 for part breakdown REMOVAL OF MAIN GEAR DRAG LINK Remove drag link from trunnions on step bulkhead Axle is heat shrunk to drag link and is not removable REMOVAL OF NOSE GEAR FROM NOSE BOX Gear must be in down position Relieve pressure in system place gear selector handle in neutral position lever between up and down and remove rear hydraulic line Remove 4 bolts on forward end of cylinder Drain fluid Pull aft to expose internal piston rod Loosen jamb nut on forward side of cylinder ram at rod end Turn piston from aft side of nose box out of rod end Lift up on gear assembly to unlock Slide out of nose box Note On installation adjust piston so it bottoms out on aft flange when nose gear is in locked position Also note orientation of trolley blocks The side with the most edge distance from hole is to go toward each other on inside of trolley See figure
24. erse process affects extension Gear position light proximity switches are closed when the appropriate hook containing the magnetic material nests over the locking bar Shock absorption for the main landing gear is provided by a hydraulically dampened air spring Figure 5 4 shows the main components The oil and air share a common chamber When the oleo is collapsed the oil is forced through the main orifice compressing the air in the upper cylinder Extension reverses this process The extended oleo is initially set at the factory to 210 psi no load In field adjustment of air pressure and oil volume is described in this section The nose gear has an over center down lock Retraction occurs when pressure is applied to the forward face of the actuator piston and the carriage is drawn along the tracks in the nose box as shown in figure 5 6 Gear position light proximity switches are closed when the piston containing the magnetic material has reached either end of its travel The nose gear consists of composite fiberglass beams that are attached at the bottom to castering blocks Inside the block is a castering pin that is set into the machined fork assembly The castering pin allows the nose wheel to pivot in a complete circle The geometry is such that no shimmy dampers are necessary A 1002554 14 Hev E SERVICE MANUAL FOR 8000 FLOATS spring loaded cam rides in a groove machined in the castering pin This groove as a flat surface on the bac
25. gation After a thorough cleaning of the suspected damaged area all structural parts should be carefully examined to determine the extent of damage Frequently the force causing the initial damage is transmitted from one member to the next causing strains and distortions Abnormal stresses incurred by shock or impact forces on a rib bulkhead or similar structure may be transmitted to the extremity of the structural member resulting in secondary damage such as sheared or stretched rivets elongated bolt holes or canned skins or bulkheads Points of attachment should be examined carefully for distortion and security of fastenings in the primary and secondary damaged areas at locations beyond the local damage Inspect aircraft skins in area of float fitting attach for sign of bending or any other signs of damage Corrosion 1002554 10 Hev E SERVICE MANUAL FOR 8000 FLOATS 3 FLOAT HANDLING JACKING AND AIRCRAFT TOWING To jack the floats for servicing tires brakes or doing retraction tests it is recommended that a floor type jack three ton minimum be used These jacks are commonly used for truck repair The jack should be positioned on the keel centerline on the first bulkhead forward of the step The jack should contact the keel squarely and if room permits slip a board between the jack and keel Raise the float slowly making sure the aircraft stays balanced After raising block up the keel in several places and lo
26. ist and inspect Aircraft lifting rings for proper assembly before connecting to aircraft Use Ballast from tie down ropes to ensure level lifting 11 Raise aircraft until wheels are just touching the ground and assemble Crew minimum 6 people for installation 12 Remove saddles holding main gear in place With support crew stabilizing Aircraft hoist aircraft clear of main gear and roll away from aircraft 13 Lube saddles on aircraft and saddle bolts and position float under plane BENE 14 Lower aircraft to floats install front struts first then lower aircraft onto Saddles and install clamps 15 Torque the saddle bolts to 75 ft lbs 16 Remove the nose gear 1002554 Rev E SERVICE MANUAL FOR 8000 FLOATS CONT CESSNA 208 FLOAT RE INSTALL INSTRUCTIONS PROCEEDURES THIS IS INTENDED AS A GENERAL GUIDE EACH INSTALLATION MAY HAVE med SUBTLE DIFFERENCES ALWAYS USE THE INSTALLATION DRAWINGS AS THE FINAL REFERENCE ALL WORK SHOULD BE DONE BY CERTIFIED AIRCRAFT TECHNICIONS 17 Install the flying wire fitting Install flying wires rig with regard to airflow 18 Secure the steering bungee amp connect the hydraulic lines BENE 19 Locate jack stands under floats nn 20 Perform gear check amp ensure all lights agree with gear and gear advisory BENE 21 Cycle time up Cycle time down Check for leaks 22 Hand pump the gear down and up and check for leaks again 23 Install springs for st
27. k face with the result that the cam provides retention of the pin the block and self centering of the wheel SERVICE NOSE GEAR The nose gear pivot assembly should be cleaned and inspected every 25 hours or more frequently whenever in water for extended period of time especially saltwater Nose gear tracks that are the older style gold track and white block are to be lightly greased Apply grease to a cloth on a stick or rod and run along tracks inside of the nose box both sides Newer track and block that are black should be cleaned and left dry or alternately cleaned and wiped with a rag with dry silicone spray on it The nose wheels contain grease nipples for the wheel bearings They should be greased every 25 hours Nose tires are standard 5 00 x 5 10 ply inflated to 60 5 psi SERVICE MAIN WHEELS AND BRAKES Grease nipples are provided on all wheels and bearings and should be greased every 25 hours or after an extended period of time in the water Water heat resistant grease is recommended and it is important as with any aircraft operations not to mix types of products The dual piston brakes need no special care other than to maintain the brake disc free of rust which causes premature brake lining wear Bleeding is carried out in the usual manner from the bottom up Main wheel tires are standard 6 00 x 6 8 ply type III aircraft tires inflated to 45 5 psi Refer to figure 5 5 SERVICE MAIN GEAR OLEO Oil Level
28. ns cover holes with cover plates jn NN Nuts from top bolts in forward struts A O ne 1 1 Jj Cotter pins from pulley brackets under cargo door MEET 2 1002554 32 SERVICE MANUAL FOR 8000 FLOATS PA CONT CESSNA 208 FLOAT REMOVAL INSTRUCTIONS PROCEEDURES THIS IS INTENDED AS A GENERAL GUIDE EACH INSTALLATION MAY HAVE Left SUBTLE DIFFERENCES ALWAYS USE THE INSTALLATION DRAWINGS AS THE FINAL REFERENCE ALL WORK SHOULD BE DONE BY CERTIFIED AIRCRAFT TECHNICIONS remove from aircraft mmm LOLA lg A Joj A E nn TS _ AA SSL e d A Lo Y MA Steering cables in tail Remove rudder horn or clamp to main rudder Cables 7 7 Assemble maingearifneeded main gear if needed TAssemble B Install nose gear and atach ter bungee J nan 9 MER support crew minimum 6 people 10 With wheels just touching the ground remove the 4 main gear saddles and Upper front attach bolts 11 Lift aircraft and remove floats 12 Lower aircraft and install main gear assembly 13 Torque main gear saddle bolts to 75 ft Ibs pf 1002554 RevE SERVICE MANUAL FOR 8000 FLOATS CONT CESSNA 208 FLOAT REMOVAL INSTRUCTIONS PROCEEDURES MECHANIC THIS IS INTENDED AS A GENERAL GUIDE EACH INSTALLATION MAY HAVE SUBTLE DIFFERENCES ALWAYS USE THE INSTALLATION DRAWINGS AS THE FINAL REFERENCE ALL WORK SHOULD BE DONE BY CERTIFI
29. of the gear tunnel It is accessible 1002554 16 Hev E SERVICE MANUAL FOR 8000 FLOATS through the top deck access cover The aft proximity switch is located on the float bulkhead just aft of the wheel well accessible though the float top deck cover The main gear proximity switches are adjusted loosening the mounting screws and positioning them as such that the light goes out when the lock hook is raised about 1 8 inch off its nested position and comes on again upon nesting BLEEDING HYDRAULIC SYSTEM AFTER SERVICE The system automatically bleeds provided sufficient oil is maintained in the reservoir To check the fluid level fill the reservoir with hydraulic oil and cycle the gear The fluid level should be maintained in the upper one third 1 3 of the sight glass If the reservoir empties i e fluid disappears in sight glass stop the cycle by pulling the circuit breaker on the control panel Fill the reservoir again and complete the cycle Continue this procedure until the fluid level in the reservoir stabilizes it will vary in level between up and down positions If the fluid level continues to decline during gear cycles check for external leaks 1002554 17 Hev E SERVICE MANUAL FOR 8000 FLOATS 5 2 MAIN AND NOSE GEAR REMOVAL AND DISASSEMBLY REMOVAL OF MAIN GEAR OLEO Jack the aircraft by method described in section 3 With main wheels off the ground both sides run the gear up so that the main carriage is approximately 2 in
30. or repair The unit may be disassembled for cleaning 1 Relieve the pressure in the hydraulic system by placing the gear selector handle in the neutral position 2 On the forward lower side of the reservoir remove drain plug to drain most of the hydraulic fluid 1002554 27 Rev E SERVICE MANUAL FOR 8000 FLOATS 3 Remove the 4 screws on each tank 2 on upper side of the reservoir Dump out remaining oil and clean reservoir Unscrew stand pipe with the filter attached Clean filter If filler is removed from stand pipe a new filter should be used Reinstall tank and install seals to top of reservoir before installing on pump Install drain plug and fill with clean MIL H 5606 hydraulic fluid through the breather pipe 10 Fluid level should be in the upper 2 3 of the sight gauge oo E UIT 1002554 27 Rev E INSPECTION TIME LIMITS amp CHECKLIST A complete inspection Annual Inspection would include all 25 50 100 200 hour items 25 50 100 200 Right Check installed placards against the AFM or POH and installation drawings X X Hulls amp Float Installation Float exterior inspect for damage Struts wrinkled metal corrosion paint X X loss etc Boarding steps disassemble as needed If the floats are installed remove and grease the step slide tubes the center section fairings for access Struts and attach fittings X X clean upper attach fittings and dog bone saddle area
31. otor ground 2 PROBLEM Powerpack does not shut off after gear reaches position PROBABLE CAUSE a Faulty pressure switch b Faulty or dirty pressure relief valve allowing insufficient pressure buildup REMEDY a Replace pressure switch b Clean and check relief valve 3 PROBLEM Powerpack shuts off before gear reaches position PROBABLE CAUSE a Binding or jammed gear retractor which causes pressure to build up and stay up and pressure switch shuts off powerpack b Faulty or dirty pressure relief valve allowing insufficient pressure buildup REMEDY a Repair retractor 4 PROBLEM Powerpack cycles on and off after gear is in position PROBABLE CAUSE a Internal hydraulic leak b External hydraulic leak 1002554 37 Rev E REMEDY a Verify leak is not external by checking fluid level in reservoir and looking at couplings for oil leaks If no external leaks are found disconnect and cap off the hydraulic actuators one at a time and find the leaky one by process of elimination If isolating entire system still indicates internal leak powerpack check valve located in pressure port of pump is bad and needs replacement or reseating b Visually inspect lines cylinders and hoses and replace as necessary 5 PROBLEM Powerpack cycles on and off during gear cycle PROBABLE CAUSE a Binding in retraction unit b Pressure switch cut off limit too low REMEDY a Investigate for free operation Check gear
32. quivalent products just as satisfactory for protection However it is recommended if trying different products to inspect them frequently so as to determine their effectiveness Protection of nuts bolts hydraulic lines metal surfaces or electrical connections Dinitrol AV30 Dinol Group CRC SP400 Soft Seal CRC Industries General Lubricants LPS 1 LPS 2 and LPS 3 LPS Industries Wheel Bearings Main Gear Retract Mechanism Nose Gear Pivot and Rod Ends HCF Grease P N 605 HCF Industries Rust Protection Boeshield 9 Rust Protection Boeing Company ACF 50 Rust Protection 1002554 25 Hev E SERVICE MANUAL FOR 8000 FLOATS Float Sealant 890 B2 or B4 Pro Seal Company RTV Silicones General Electric SIKAFLEX 201 or 252 Sika Manufacturing Teflon Spray 6P 730A Comet Industries Hydraulic Fluid Mil H 5606 Bolts in Critical Areas For common correct torque when installed or when visual inspection indicates a need for a torque check Nut Size Win Mex 12 20 480 690 5 4 HYDRAULIC PUMP SYSTEM DISASSEMBLY AND SERVICE The hydraulic pump is factory preset to the following pressures Pressures switch operates below 500 psi and shuts off at 1000 psi The pump also has an internal relief valve that opens at 1200 psi and a thermal relief valve that opens at 1900 psi These pressures are set with factory test equipment and are recommended to be sent back for overhaul
33. r the gear up position lights Set the proximity switch mounting clip along outer cylinder body to a position such that the light goes out when the over center track is about inch from bottomed position while traveling in the up direction Lights should come on about 1 8 inch from the bottomed position while traveling in the down direction The cylinder piston has a magnet that will activate the proximity switches Nose Box Track Wear Due the wear over time the roller slide block places on the track as the gear are retracted the block needs to be measured for the amount of wear The tolerance for wear is 050 inches If the wear is or is less than the limit it can still be used If the wear in the track is greater than 050 inches the block must be replaced This check is to be done every 200 hours and is part of the maintenance checklist On the 8000 Series Floats Gear Track P N 8A07337 003 LT 004 RT SERVICE MAIN GEAR RETRACTION SYSTEM The main gear actuator cylinder is not adjustable These are pre set at the factory to ensure that the main gear is locked at the end of each stroke and that correct indication is given on the cockpit console The up and down lock may be adjusted so the lock is fully engaged by adjusting the set screws shown in figure 5 3 Loosen the jamb nut adjust and tighten jamb nut The main gear proximity switches are located on each end of the gear stroke The forward switch is located on the forward side
34. rvice Hydraulic fluid in reservoir should be checked for moisture or other contaminates and changed if necessary Insp FWD slide tube mounting bolt for corrosion and wear when the gear are out X Clean and lube the slide tube before returning Main and Nose gear actuator assemblies inspect for condition lubrication leakage corrosion and cleanliness X X With gear out Inspect FWD slide tube mounting bolt for corrosion and wear Clean amp grease FWD slide tube inspect for cracks delamination and paint Main gear drag link garlock bushings inspect for condition lubrication and corrosion 1002554 Hev E INSPECTION TIME LIMITS amp CHECKLIST LP Clean the wheel wells to facilitate general X X condition inspection Main gear oleos inspect for evidence of leakage proper extension check cylinder for X X corrosion pitting cleanliness and security Hydraulic lines and fittings inspect for leaks es star pa X X condition and security Hydraulic Manifolds if equipped inspect for P X X condition security and leaks Brake system plumbing inspect for leaks sa X X condition and security Main gear oleos Check for static TE E compression leaks and proper pressure The u dene na qur Deen de 5606 hydraulic fluid amp Nitrogen X X oleo should be fully serviced or replaced with Refer to section 5 2 overhauled as required Perform retraction test Inspect m
35. s shown in figure 8 3 Splicing normally is done when both sides of an extrusion are damaged Capping is done when only the outside of an extrusion is damaged such as the main keel during gear up landings on pavement Capping also is done when the original skin is still bonded to the inside of the extrusion Sections of extrusion for splicing or capping may be purchased from Wipaire in any length needed Stub skins can also be bonded on extrusion sections if desired to simplify the repair There are many ways to repair Wipline floats and each method depends on the degree and location of the damage The following figures are examples of some repairs For additional help contact the Wipline float factory at 651 451 1205 1002554 54 Hev E SERVICE MANUAL FOR 8000 FLOATS EXISTING KEEL WITH DAMAGED AREA REMOVED MOSES ELIT ATA 3 Min USE AN426AD5 C SUNK RIVETS 2 159 DIA 1000 C SUN REMOVE OUTSIDE OF KEEL APPROXIMATELY 3 AS SHOWN TO RECEIVE REPAIR KEEL REPAIR KEEL PRECUT AND MACHINED FROM FACTORY FIGURE 8 1 TYPICAL REPAIR SPLICE OF KEEL Hev E 55 1002554 SERVICE MANUAL FOR 8000 FLOATS KWOLJVA NID ONY 105380 INIHI NIKO BI 313038 OL NAOHS SH a NIB 30 301SLN0 24030 152 0001 10 651 H 305 2 809920 ISN NIM t 340420 VANY 030 ONTISTAS FIGURE 8 2 TYPICAL REPAIR SPLICE OF CHINE Hev E 56 1002554 SERVICE MANUAL
36. ter for each float is 8108 pounds buoyancy for the seaplane and 7922 pounds buoyancy for the amphibian The amphibian float is geometrically the same as the seaplane except for the addition of landing gear and internal structure for the gear The water rudder system is cable operated with ball bearing pulleys Water rudder cables tie into the existing aircraft rudder system The main landing gear has dual 600 x 6 8 ply tires and the nose landing gear has one 500 x 5 10 ply tire The gear system is hydraulically actuated and driven by two hydraulic pumps Brakes are hydraulic and have a caliper on each main wheel for a total of four brakes Steering on land is accomplished by differential braking The nose wheels are full castering Access to the float interior is accomplished by removing covers on the top deck and six covers inside the wheel well When necessary water inside the float hulls may be removed through pump out cups located on the outboard edge of each float top skin 2 FLOAT HULL MAINTENANCE General The float structure is manufactured entirely of 6061 16 corrosion resistant aluminum sheet and extrusions Skins on the inside are primed with a 3M SCOTCHWELD primer after being cleaned and acid etched Exterior surfaces are cleaned and alodined Surfaces are then primed with an epoxy based primer and finished with enamel color paint Cleanin 1002554 9 RevE SERVICE MANUAL FOR 8000 FLOATS Hard Landing and Damage Investi
37. the old style O rings are used Tighten the associated jam nut at that end and stake it for added security d Set this metering tube assembly aside and move on to next steps 4 On the other end install the metering pin with Lock Tite onto the end cap and tighten to approx 30 ft lbs 5 Install outer T seal to end cap with Vaseline Also lube the inside of the outer cylinder where the end cap seats for ease of assembly NOTE Use Vaseline or equivalent as it dissolved in hyd fluid e E Aa E EN n di EM AS LS xr i r 6 Install the end cap bolts with gasket sealer on the threads for added security to 1002554 19 Hev E 25 30 in Ibs making sure not to over tighten there by damaging the T seal Set this part of the unit aside and move on to next steps 4 gt E wo Ta 7 To assemble the gland assembly insert the inside T seal and wiper again using Vaseline on the T seal a he gland much be installed from the end cap side this is the side without the holes b Lube the outside of the inner cylinder with hyd fluid for ease of assembly c Install the T seal into the end cap again using Vaseline for lube d Install the inner cylinder into the end cap the end of the tube without holes 1002554 20 Hev E SERVICE MANUAL FOR 8000 FLOATS 8 For piston install place the piston onto the metering tube using hyd fluid to prevent damage
38. to the threads a Using a spanner wrench tighten the piston to the inner cylinder b Install the jam nut onto the piston end of the metering tube and stake for security c Install the 2 T seals onto the exterior of the piston and gland and lube with Vaseline 9 Gently clamp the outer tube end in a vise and add 1900 ml of hyd fluid 5606 or equivalent 10 Lube the inside of the outer cylinder where the gland and the piston will rest 11 Install the inner cylinder into the outer assembly making sure that the gland is seated against the piston 1002554 21 Hev E SERVICE MANUAL FOR 8000 FLOATS 12 Re install the units center bolts using gasket sealer 13 Install the O ring onto the fill drain plug before installing the plug onto the end cap and tighten 1002554 23 Hev E SERVICE MANUAL FOR 8000 FLOATS Y T 14 Install the O ring onto the Schraider valve and install onto the outside of the end cap NOTE Align Schraider valve 180 degrees from the Placard NOTE Double check the plugs and bolts for proper Installation and security before adding gas charge 15 Fill the strut with nitrogen to 250 psi _ 10 psi and close the valve and cap 4 w n 1002554 23 Hev E REMOVAL OF MAIN GEAR RETRACTION CYLINDER Relieve pressure in system place gear selector handle in neutral position lever between up and down and r
39. wer the jack Raise only one float at a time with the opposite float landing wheels chocked Position a sawhorse under main and after body keel to keep aircraft from tipping fore and aft When towing the amphibian aircraft tow lugs are provided on the lower forward side of the nose spring A rigid V frame can be fabricated to attach to these lugs and aircraft towed with a tractor Wipaire Parts has this tow bar available A lifting apparatus that will pick the aircraft up by the lifting rings at wing attach points from a ceiling hoist to be fabricated Contact factory for details if necessary 4 AMPHIBIAN LANDING GEAR SYSTEM OPERATION amp MAINTENANCE The landing gear incorporated within the amphibious floats on this airplane is retractable quadricycle type with two swiveling nose or bow wheels and four 4 two 2 sets of dual main wheels Air oil shock struts on the two main landing gear assemblies provide shock absorption The main landing gear has dual 6 00 x 6 8 ply type lll tires and the nose landing gear has one 5 00 x 5 10 ply tire The gear system is hydraulically actuated and 1002554 11 Hev E SERVICE MANUAL FOR 8000 FLOATS driven by two hydraulic pumps Brakes are hydraulic and have a caliper on each main wheel oteering on land is accomplished by differential braking The nose wheels are full castering Landing gear extension and retraction is accomplished by two 2 electrically driven hydraulic pumps
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