Graco 312888D User's Manual
Contents
1. 15 SAG 16 Pattern Control Tip 16 Screen Screw and Port Closure Plugs 16 Valving Rod and Resilient Sleeve 17 Coupling Block and Check Valves 18 Impirigers ori im bn x bp ote a 19 Gut BICK 4 Eu ate 20 Pressure Check Valving Rod Resilient Sleeve 21 PariS slo ea 23 AR Pour Gun 255828 23 AR D Conversion Kit 24A023 29 Electrical Diagram 30 Technical Data 31 Performance Charts 31 Graco Standard Warranty 32 Graco Information 32 312888D Warnings Warnings The following warnings are for the setup use grounding maintenance and repair of this equipment The exclama tion point symbol alerts you to a general warning and the hazard symbol refers to procedure specific risk Refer back to these warnings Additional product specific warnings may be found throughout the body of this manual where applicable aD TOXIC FLUID OR FUMES HAZARD AA Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin inhaled or swallowed e Read MSDS s to know the specific hazards of the fluids you are using e Store hazardous fluid in approved containers and dispose of it according to applicable guidelines e Always wear impervious gloves when spray2. Check your local electrical code and your proportioner manual for detailed grounding instructions Ground the spray gun through connection to a Graco approved grounded fluid supply hose 312888D Operation Basics Safety Stop The gun has a two position safety stop The SERVICE CLOSED position permits both material inlet ports to remain closed when gun is triggered Safety Stop Engage Safety Stop To engage safety stop push in and turn clockwise to CLOSED rear detent position then release Disengage Safety Stop To disengage safety stop push in and turn counterclock wise to place in OPEN forward detent position then release Operation Basics Air Hose Connection Connect Air Hoses Pull back sleeve of female fitting insert male fitting and slide sleeve forward to secure connection Disconnect Air Hoses Pull back sleeve of female fitting and pull out male fitting Pull Sleeve Coupling Block Chemical hoses are joined to gun block by coupling block to ease installation and removal of gun Manual Valves Triggering gun with manual valves closed may cause crossover if gun ports contain residual chem ical To prevent release of pressurized chemicals never open manual valves unless coupling block is secured to gun or exit port is directed into flush pail 1 Open manual valves using 5 16 in nut driver turn manual valves counterclockwise approximately three full turns D
3. Screen Screw Mounting Screw 4 Flush assembly and place it in gun cleaner 5 Remove port closure plugs with nut driver These are installed using high strength sealant apply heat to help break free when removing 6 Clean port closure plugs with gun cleaner and inspect for damage Replace if necessary Apply sealant 49 to plugs before reinstalling 7 Remove screen from screen screw Soak in gun cleaner or replace if clogged or dirty 8 Clean screen screw cavity Clean with clean out drills and flush with gun cleaner If more than 20 of screen is blocked replace screen 9 Inspect screen screw seal and closure screw gasket for damage Replace if necessary 10 Reinstall screen screw assembly and tighten mount ing screw 11 Insert port closure plugs Valving Rod and Resilient Sleeve Disassembly and Cleaning MPa bar PSI Inadvertent actuation of trigger with spring retainer case removed could cause serious injury 1 Follow Pressure Relief Procedure page 12 312888D Repair 2 Remove spring retainer case by grasping handle firmly and pushing in on retainer case with palm of hand Simultaneously rotate case a quarter turn counterclockwise to remove case from locking col lar 3 Cover open end of air cylinder with hand protected by a cloth and depress gun trigger The following two steps must be accomplished next to prevent accidental operation of gun
4. 4 Disconnect airline to gun Pull back on outer ring of quick disconnect coupling to disconnect air from gun 5 Disconnect electrical harness from gun 6 Examine resilient sleeve assembly for damage Structural damage or wear will show as e scratches or chaffing of outside wall of sleeve e movement or extrusion of sleeve in either threaded mandrils e reduction in sleeve diameter A uniform depression of equal depth around diame ter of sealing point of throat is normal 7 If any damage or wear exists replace both valving rod resilient sleeve and front packing 8 Remove valving rod resilient sleeve assembly if it needs to be replaced a UseaGin adjustable wrench to unthread cou pler toward resilient sleeve If necessary use a 5 16 in nut driver to hold valving rod b Once coupler is loose unthread resilient sleeve assembly 17 Repair Reassembly 1 If valving rod resilient sleeve assembly was removed or is being replaced use the following steps a Thread coupler onto resilient sleeve assembly by hand as far as it will go toward sleeve There should be approximately 1 16 in 1 5 mm clearance between coupler and valving rod b Use a 6in adjustable wrench and a 5 16 in nut driver to securely tighten coupler Coupler N 1 16 in 2 Align slot on valving rod with pin in cylinder and push valving rod assembly all the way forward then rotate 180 degrees There should be some
5. determine if weepage occurs in this position Weepage 7 If weepage is observed in either step replace valv ing rod and or throat See Valving Rod and Resil ient Sleeve page 17 to replace valving rod See Impingers page 19 to replace throat If throat is not properly seated in gun block mate rial leakage will occur around outer area of throat If this occurs insert throat wrench over resilient sleeve and tighten throat 8 Close resin manual valve 21 Repair 22 312888D Parts AR Pour Gun 255828 BC Ref Part BA 255827 BB 253728 BC 285771 312888D BA EY lt gt PR 3j 7 Description GUN auto AR C KIT AR gun tool not shown BLOCK AR coupling Qty Impinger Options Parts Impinger C Size Front Rear Orifice Area Part Style Part Style Factor 299974 23 B 1 299990 23 B 1 900 299975 33 B 1 None 33 B 1 1200 299976 33 C 1 299991 33 C 1 1800 299977 34 C 1 299992 34 C 1 2400 299980 46 B 1 299995 46 B 1 3000 299978 36 C 1 299993 36 C 1 3600 None 46 C 1 299996 46 C 1 4500 299982 48 C 1 299997 48 C 1 6000 299983 58 C 1 299999 58 C 1 7200 Table 1 Impinger Options C Size Impinger D Size Front Rear Orifice Area Part Style Part Style Factor 2999
6. resistance when pushing valving rod assembly through throat Valving Rod Closure Spring 3 Insert valving rod closure spring into cylinder and over end of valving rod 4 Push valving rod retainer case over spring into cylin der and rotate clockwise approximately a quarter rotation until retainer case snaps into position 18 Coupling Block and Check Valves Disassembly 1 Follow Pressure Relief Procedure page 12 2 Use 5 16 in nut driver to remove coupling block mounting screw and separate gun from coupling block 3 Flush both material ports on face of coupling block to prevent material buildup 4 Remove check valve gasket Place end of coupling block gasket removal tool into notches next to gas kets and pry them out Coupling Block Gaskets 5 Flush open ports and check valves with gun cleaner 6 Remove check valves by pressing them inward and popping them out or by using the magnet Iso check valve is notched for identification pur poses 312888D 7 If material buildup prevents easy removal use three pronged end of check valve removal tool to grasp check valve and turn free Opposite end of check valve removal tool is designed to clean check valve cavity 8 Place all parts in gun cleaner and flush exposed ports Reassembly 1 Inspectseats on gaskets for nicks Replace seats if damaged 2 Insert check valves notched valve on left side and gaskets into gun bl
7. 79 33 C 1 None 33 C 1 1800 None 36 C 1 299994 36 C 1 3600 None 48 C 1 299998 48 C 1 6000 None 58 C 1 261789 58 C 1 7200 299984 59 D 1 None 59 D 1 10800 299985 66 D 1 285750 66 D 1 8400 None 78 D 1 285751 78 D 1 12800 261790 79 D 1 None 79 D 1 14400 299987 90 D 1 285752 90 D 1 18000 299988 94 D 1 None 94 D 1 25200 Table 2 Impinger Options D Size 23 Parts Auto AR C Gun 255827 312888D 24 Parts 18 298354 PIN mounting 19 299475 RETAINER 20 299960 CYLINDER air assy 21 299962 ROD valving 22 297312 COLLAR lock 23 296136 SLEEVE 24 299966 RETAINER spring case assy 25 297313 SPRING die heavy duty Impinger Options on page 23 for part numbers 43 IMPINGER rear see 1 Impinger Options on page 23 for part numbers 49 102969 ADHESIVE anaerobic 1 I Ref Part Description Qty Ret PAN Description Qty 56 299969 COUPLING connecting 1 it 296621 SEAL screw screen 1 27 297314 O RING fluoroelastomer 2 Si CE 1 28 299970 STOP notched 1 retaining P 4t 295175 SCREW screen gun block 1 zm PA fom S chee 1 33 103648 PACKING o ring 1 di oo 1 34 298355 SEAL retainer 250 1 8 297307 SCREW mounting 1 in 1 35 296140 PACKING R 1 dc 1 86 298356 SEAL screw 250 1 ME S c E UO Coupler 1 37 298117 SCREW 1 4 28x1bhcs nyloc 2 TV 27208936 COUPLER Ine air 1 38 299908 SCREW 1 4 28 x 1 1 4 1 12 297308 SCREW closure
8. A port 1 shcs nyloc 13 296129 SCREW closure R port 1 39 256213 HANDLE auto ar gun 1 14 299923 BLOCK gun spacer w stud 3 40 285795 BLOCK gun assy 1 15 297150 SCREW cap socket head 3 41 299973 TIP 250 pattern control also 1 16 299925 HANDLE gun mounting plate 1 shown on page 24 17 299951 TRIGGER lever i 42 IMPINGER front see 1 1 1 1 1 1 1 1 t Parts included in Kit 296624 available separately Parts included in Kit 298357 available separately 312888D 25 Parts Gun Handle Assembly 256213 26 312888D Ref 201 202 203 204 205 206 207 208 209 210 211 213 214 215 216 217 Part 298116 108195 C19950 296066 106555 106560 C20988 112085 299917 295685 299926 299927 299928 299929 299930 299931 299932 Description SCREW 4 40 x 3 4 shcs PACKING o ring SCREW cap sch O RING piston pump PACKING o ring PACKING o ring PACKING o ring PACKING o ring SCREW 5 40 x 3 8 button hd cap O RING TRIGGER bushing SPRING TRIGGER actuator pin SPOOL RING seal ROD piston VALVE exhaust cap Air Cylinder Assembly 299960 Ref 401 402 403 404 405 406 407 Part 299954 297309 299956 299957 299959 297310 297311 312888D 406 Description COVER dust SEAL u cup fluoroelastomer CYLINDER air PISTON assy CYLINDER flange assy O RING fluoroelastomer SEAL u cup fluoroelastomer 9 lt A k
9. LO WD A W m m m m ll Ref 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 407 Part 299933 256214 299936 299937 299938 299939 299940 15M966 299135 299020 102279 299948 299475 299971 285776 295439 114375 404 Description INSULATOR circuit board WIRE gun harness assy MANIFOLD air SCREW 2 56 x 7 16 phms COVER PLATE rear cover GASKET pilot valve BOARD assy SWITCH arm lever SCREW shoulder SCREW set socket VALVE solenoid valve assy RETAINER HOSE 1 4 x 2 in mxf air WASHER packing washer LINER valve spool PACKING o ring HANDLE Parts 9 lt k k M k k k k k k k k I A m m 27 Parts Coupling Block Assembly 285771 28 607 Ref 501 502 503 504 505 506 Ref 601 602 603 604 605 606 607 608 609 610 611 612 Part 295619 295693 117506 117595 Part 117642 117661 118665 285763 285765 285767 295898 295935 296187 296191 297973 Description SCREW mounting PLUG pipe 285771 only VALVE manual BLOCK coupling FITTING swivel 1 4 npt x 6 JIC FITTING swivel 1 4 npt x 5 JIC Description TOOL nut driver PIN vise TUBE grease 4 oz TOOL throat wrench KIT cleanout drills Qty TOOL 250 rear impinger wrench TOOL 250 pct imp cleanout BRUSH cleanout impinger KIT spade cleanout BRUSH bore cleanout gun block TOOL r
10. Operation Parts G 7 GRACO AR Pour Gun 312888D For use with non flammable polyurethane foams Not for use in explosive atmospheres Part No 255828 2000 psi 13 8 MPa 138 bar Maximum Working Pressure Important Safety Instructions e Read all warnings and instructions in this manual Save these instructions CE PROVEN QUALITY LEADING TECHNOLOGY Contents Warnings i n Rr eee 3 Isocyanate Hazard 5 Material Self ignition 5 Moisture Sensitivity of Isocyanates 5 Keep Components A and B Separate 5 Foam Resins with 245 fa Blowing Agents 5 Changing Materials 5 Components 6 Operation Basics 7 Grounding 7 Safety Stop a areto 7 Air Hose Connection 8 Coupling Block 8 Initial Set Upi 10 Daily Start Up 11 Daily Shutdown 11 Pressure Relief Procedure 12 Maintenance 13 Gun Service Kits 13 Daily Cleaning Procedure with Gun Service Kit 13 Daily Cleaning Procedure without Gun Service Kit 14 Flush QUI ze 14 Trigger Gun While Disconnected 14 Troubleshooting
11. RACO MAKES NO WARRANTY AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FORA PARTICULAR PURPOSE IN CONNECTION WITH ACCESSORIES EQUIPMENT MATERIALS OR COMPONENTS SOLD BUT NOT MANUFACTURED BY GRACO These items sold but not manufactured by Graco such as electric motors switches hose etc are subject to the warranty if any of their manufacturer Graco will provide purchaser with reasonable assistance in making any claim for breach of these warranties In no event will Graco be liable for indirect incidental special or consequential damages resulting from Graco supplying equipment hereunder or the furnishing performance or use of any products or other goods sold hereto whether due to a breach of contract breach of warranty the negligence of Graco or otherwise FOR GRACO CANADA CUSTOMERS The Parties acknowledge that they have required that the present document as well as all documents notices and legal proceedings entered into given or instituted pursuant hereto or relating directly or indirectly hereto be drawn up in English Les parties reconnaissent avoir convenu que la r daction du pr sente document sera en Anglais ainsi que tous documents avis et proc dures judiciaires ex cut s donn s ou intent s la suite de ou en rapport directement ou indirectement avec les proc dures concern es Graco Information TO PLACE AN ORDER contact your Graco distributor or call to identify the nearest distribu
12. d Do not exceed 2000 psi 13 8 MPa 138 bar maxi mum fluid working pressure even in static de trig gered conditions or check valve damage may result 312888D Daily Start Up Daily Shutdown 2 4 M Follow daily shutdown when gun is out of service for any length of time Daily disassembly of gun for cleaning is not recommended if it has been operat ing properly However if you remove the gun from the coupling block flush and clean thoroughly 1 Set safety stop to OPEN 2 Close both manual valves 3 Disconnect air supply from gun 4 Shutdown proportioning unit as required See Pro portioner manual 5 Cleanasrequired Do not disassemble gun daily for cleaning if it is operating properly However if gun is removed from coupling block it must be flushed and cleaned thor oughly 11 Pressure Relief Procedure Pressure Relief Procedure SA Relieve pressure before cleaning or repairing gun 1 Close both manual valves 2 Set safety stop to OPEN 3 Trigger gun onto cardboard or into waste container to relieve pressure 4 Release gun trigger set safety stop to SERVICE CLOSED and close manual valves A 2 Ne A If fluid in hose and proportioner is still under pressure follow Pressure Relief Procedure in your Proportioner manual To relieve pressure in hose after gun is removed place fluid manifold ov
13. e trigger and close manual valve on service block 12 Repeat steps 7 11 for other side of gun 13 Remove service block of gun service kit from spray gun 14 Set safety to SERVICE CLOSED 15 Disconnect air supply 16 Clean removed component parts Do not use metal cleaning devices to clean plastic components 13 Maintenance Daily Cleaning Procedure without Gun Service Kit If the Gun Service Kit is not available the iso side com ponents must be cleaned daily b 5 AR Gun Tool Kit 253728 on page 28 1 Place safety stop in SERVICE CLOSED position 2 Remove pattern control tip 3 Remove front impinger packing and o ring from pattern control tip 4 Using pattern control tip impinger cleanout tool 607 clean the inside bore of the pattern control tip by inserting and spinning 5 Using cleanout spade 609 clean the front impinger by sliding through slots Clean inside bore of the impinger as necessary 6 Inspect packing for built up iso and deformities and replace as necessary 7 Inspecto ring for flat areas and replace as neces sary 8 Remove screen screw then remove screen from screen screw Inspect gasket and replace as neces sary 9 Clean screen screw and screen with solvent If iso build up exists on screen screw clean with brass wire brush as necessary 10 Clean gun block with solvent 11 Remove iso check valve gasket using gasket removal tool 611 12 Using check
14. eck for leaks See Proportioning Unit manual 8 Bleed air from chemical hoses a Hold coupling block with exit ports pointed into disposable container b Open each manual valve to allow trapped air to escape Bleed each side until chemical is free of air c Close both manual valves 9 Use clean cloth soaked in gun cleaner to wipe clean coupling block and its mating surfaces CAUTION do not apply grease to mating surfaces of coupling block To avoid accumulation of dirt and other contaminants 10 Install coupling block to gun block 11 Proceed with Daily Start up procedure or Shutdown procedure as required 10 312888D Daily Start Up an Ensure gun is attached to coupling block and air hose and the proportioning unit is at desired temperature and pressure 1 Ensure gun is mounted onto gun block 2 Connect air supply to gun see Air Hose Connec tion page 8 3 Connect electrical harness to gun 4 Trigger gun multiple times to ensure valving rod moves through its full travel quickly and freely CAUTION Sluggish valving rod action may result in valving rod sticking in open position when fluid pressure is applied Always have a 5 16 in nut driver available to quickly close manual valves on coupling block 5 Open both manual valves see Manual Valves page 8 6 Test spray on disposable surface and adjust spray pattern as neede
15. emoval gasket TOOL removal valve 312888D E lA l ss l la l la A Parts AR D Conversion Kit 24A023 See Repair section on page 16 for conversion kit parts installation Ref Part Description Qty 701 299961 CYLINDER air assy AR D 702 297141 SLEEVE AR D 375 703 299968 SPRING die heavy duty medium 704 285755 SEAL 375 resin retainer 705 285756 SEAL 375 resin screw 706 297143 PACKING 707 299989 NOZZLE 375 throat 708 297142 PACKING front 709 299972 TIP 375 pattern control m m m m m ool oc 312888D 29 Electrical Diagram Electrical Diagram Qqavosa LINDHID NND ti12351a 312888D 30 Technical Data Technical Data Category Data Maximum Fluid Working Pressure Minimum Air Inlet Pressure 2000 psi 13 8 MPa 138 bar 90 psi 0 62 MPa 6 2 bar Maximum Air Inlet Pressure 120 psi 0 84 MPa 8 4 bar Maximum Output flow rate 40 Ib min 18 1 kg min Air Inlet Size 1 4 npt quick disconnect nipple A Component ISO Inlet Size 5 JIC R Component Resin Inlet Size 6 JIC Length 12 5 in 318 mm Height 9 5 in 241 mm Width 2 8 in 71 mm Weight 6 7 Ibs 3 0 kg Wetted Parts Stainless Steel Zinc Plated Carbon Steel Black Oxide Coated Carbon Steel Tool Steel 6 6 Nylon Acetal T Flow rate depends on pump sizes hose diameter hose length and impingers Performance Charts Imping
16. er containers facing away from you Very carefully open fluid valves Under high pressure fluid will spray sideways from fluid ports 12 312888D Maintenance Gun Service Kits Use either the 1 Quart Gun Service Kit 296980 or 3 Gallon Gun Service Kit 296981 to perform daily flushing of spray gun without disassembly 1 Quart Kit For more information about the 1 Quart Gun Service Kit see Manual 311340 3 Gallon Kit For more information about the 3 Gallon Gun Service Kit see Manual 311340 312888D Maintenance Daily Cleaning Procedure with Gun Service Kit ar 69 M To avoid static sparking that may result in fire or explo sion ensure all equipment in cleaning procedure is grounded Do not clean on or near foamed or coated surfaces or any other flammable surfaces or objects 1 Set safety stop to SERVICE CLOSED 2 Close both manual valves 3 Remove gun from coupling block 4 Disconnect air and electric 5 Attach service block of gun service kit to gun and then tighten using 5 16 in nut driver 6 Pressurize Service Kit container up to 100 psi Do not exceed 100 psi 0 7 MPa 7 bar 7 Open one manual valve on service block 8 Connectairto gun Set safety stop to OPEN 9 Hold gun against grounded waste container 10 Trigger gun and 1 Quart Gun Service Kit Spray into waste container until there is a fine unobstructed mist of gun cleaner 11 Releas
17. ers Performance Chart KEY A AR C 23 B 1 impingers B AR C 36 C 1 Impingers C AR C 58 C 1 impingers D AR D 59 D 1 front impinger and AR D 58 C 1 rear impinger 2000 13 8 138 L a E 1500 A 10 3 103 C a 1000 o 6 9 69 3 o o 2 n 500 8 4 34 0 5 15 25 35 45 55 2 3 6 8 11 4 159 205 25 0 Flow Rate in Ib min kg min Impingers tested with 100 150 centipoise Mesamoll with a specific gravity of 1 055 312888D 31 Graco Standard Warranty Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale to the original purchaser for use With the exception of any special extended or limited warranty published by Graco Graco will for a period of twelve months from the date of sale repair or replace any part of the equipment determined by Graco to be defective This warranty applies only when the equipment is installed operated and maintained in accordance with Graco s written recommendations This warranty does not cover and Graco shall not be liable for general wear and tear or any malfunction damage or wear caused by faulty installation misapplication abrasion corrosion inadequate or improper maintenance negligence accident tampering or substitution of non Graco component parts Nor shall Graco be liable for malfunc
18. ger wrench to tighten impinger into throat 19 Repair 2 3 20 Thread throat assembly by hand into gun block Use throat wrench to tighten Front impinger should contact throat surface about 1 2 to 3 4 turns from actual seating of throat to gun block surface This compression creates the inter nal seal within front portion of chamber Assemble front impinger and pattern control tip Insert front packing into pattern control tip Place front impinger over end of front packing Place pat tern control tip o ring into groove on pattern control tip Engage safety stop see Safety Stop on page 7 Press and hold trigger then hand tighten pattern control tip into gun block Release trigger to align components then press and hold trigger Use 10 in adjustable wrench to tighten pattern control tip about 1 8 turn Release trigger Repeat until the pattern control tip is snug on the gun block If after finishing step 5 the valving rod is not pro truding at least 1 64 in from the end of the pattern control tip the pattern control tip will need to be removed then steps 4 and 5 repeated The pattern control tip will need to be tightened in 1 16 or 1 32 turn increments Pattern Control Tip Gun Block In severe cases of material buildup it may be necessary to remove the gun block and soak it in gun cleaner 1 Follow Pressure Relief Procedure page 12 2 Remove the pattern control tip and front impinger see Pat
19. ing or cleaning equipment PERSONAL PROTECTIVE EQUIPMENT You must wear appropriate protective equipment when operating servicing or when in the operating area of the equipment to help protect you from serious injury including eye injury inhalation of toxic fumes burns and hearing loss This equipment includes but is not limited to e Protective eyewear e Clothing and respirator as recommended by the fluid and solvent manufacturer e Gloves e Hearing protection e SKIN INJECTION HAZARD High pressure fluid from dispense valve hose leaks or ruptured components will pierce skin This may look like just a cut but it is a serious injury that can result in amputation Get immediate surgical treatment e Do not point dispense valve at anyone or at any part of the body e Do not put your hand over the end of the dispense nozzle A Do not stop or deflect leaks with your hand body glove or rag e Follow Pressure Relief Procedure in this manual when you stop spraying and before cleaning checking or servicing equipment Tighten all fluid connections before operating the equipment e Check hoses tubes and couplings daily Replace worn or damaged parts immediately gt OR 312888D 3 Warnings FIRE AND EXPLOSION HAZARD M Flammable fumes such as solvent and paint fumes in work area can ignite or explode To help prevent fire and explosion Aa e Use and clean equipment only in well ventilated area e E
20. liminate all ignition sources such as pilot lights cigarettes portable electric lamps and plastic drop cloths potential static arc e Keep work area free of debris including solvent rags and gasoline e Do not plug or unplug power cords or turn lights on or off when flammable fumes are present e Ground equipment personnel object being sprayed and conductive objects in work area See Grounding instructions e Use only Graco grounded hoses e Check gun resistance daily e If there is static sparking or you feel a shock stop operation immediately Do not use equipment until you identify and correct the problem e Do not flush with gun electrostatics on Do not turn on electrostatics until all solvent is removed from system e Keep a working fire extinguisher in the work area 9 EQUIPMENT MISUSE HAZARD Misuse can cause death or serious injury e Do not operate the unit when fatigued or under the influence of drugs or alcohol e Do not exceed the maximum working pressure or temperature rating of the lowest rated system component See Technical Data in all equipment manuals e Use fluids and solvents that are compatible with equipment wetted parts See Technical Data in all equipment manuals Read fluid and solvent manufacturer s warnings For com plete information about your material request MSDS forms from distributor or retailer e Check equipment daily Repair or replace worn or damaged parts immediately with genuine man
21. o not open until it bottoms out 2 Close manual valves by turning fully clockwise To prevent release of pressurized chemicals close both manual valves before removing coupling block Remove Coupling Block 1 Setsafety stop to SERVICE CLOSED 2 Disconnectair hose 3 Close both manual valves 4 Remove coupling block mounting screw 5 Separate coupling block from gun 6 Wipe mating surfaces of gun block and coupling block to remove residual chemical 312888D Operation Basics 7 Cover exposed openings with grease Coupling Block Install Coupling Block Replace nicked damaged or worn coupling block gas kets 1 With gaskets in place fit coupling block to gun block 2 Insert coupling block mounting screw and use 5 16 in nut driver to tighten to gun block 312888D 9 Initial Set Up Initial Set Up Ne 4 1 Remove coupling block from gun ee 2 Check valving rod clearance in closed position Rod should extend approximately 1 32 in 1 mm beyond tip of mixing chamber 3 Adjust valving rod travel to initial setting See Valv ing Rod and Resilient Sleeve page 17 4 Connect air supply hose to gun 5 Connect A isocyanate hose red taped to notched fitting on coupling block Then connect R resin hose blue taped to fitting without notches on coupling block 6 Close both manual valves 7 Pressurize the A and R chemical hoses and ch
22. oam Resins with 245 fa Blowing Agents New foam blowing agents will froth at temperatures above 90 F 33 C when not under pressure especially if agitated To reduce frothing minimize preheating in a circulation system Changing Materials e When changing materials flush the equipment mul tiple times to ensure it is thoroughly clean e Always clean the fluid inlet strainers after flushing e Check with your material manufacturer for chemical compatibility Most materials use ISO on the A side but some use ISO on the B side e Epoxies often have amines on the B hardener side Polyureas often have amines on the B resin side Components Components A OD ZS FPX K T GOT m DOD E Overall View Gun Block ey Manual Valves Gun Block Coupling Block Trigger Valving Rod Piston Rod Safety Stop Pattern Control Tip Front Packing O ring Front Impinger Throat Rear Impinger Screen Screw Mounting Screw R Port Closure Screw Z H Gun Block S Resin Seal Retainer T Spacer U Resin Seal Screw V O ring W Resin Packing X A Port Closure Screw Y Gun Block Screen Z Gun Block Screen Screw AA Screen Screw Seal AB Snap Ring AC A Check Valve AD Coupling Block Gaskets AE R Check Valve 312888D Operation Basics To prevent accidental gun operation always discon nect air supply before servicing gun or anytime gun is not in use Grounding IN we
23. ock pressing gaskets in place Gaskets are designed for use on either side Care fully check angular seat to ensure sealing point of check valve 3 Place coupling block to gun and use 5 16 in nut driver to install coupling block mounting screw 312888D Repair Impingers Disassembly and Cleaning 1 Follow Pressure Relief Procedure page 12 2 Perform Pattern Control Tip steps see page 16 3 Remove rear impinger from throat Hold throat in place with throat wrench 604 and use rear impinger wrench 28576 to loosen impinger from throat Continue un threading by hand Rear Impinger Throat 4 Flush gun block with gun cleaner 5 Inspect seating surface area around center hole within throat for damage Use a soft object such as a wooden stick or soft brush to clean surface CAUTION Never use a sharp or hard metal object for cleaning impingers or throat Seating surface of throat is highly polished to ensure sealing of resilient sleeve 6 Use impinger cleaning brush 608 to clean both external and internal threads of throat 7 Use impinger cleaning brush to clean rear and front impingers Use cleanout spade to clean each injec tion slot of both impingers Injection Slots Rear Impinger Front Impinger Reassembly 1 Assemble rear impinger into throat Thread slotted end of rear impinger into female thread of throat Hold throat in place with throat wrench and use rear impin
24. sil ient sleeve of the valving rod may be damaged Ensure safety stop is set to SERVICE CLOSED 2 Loosen pattern control tip with a 10 in adjustable wrench Once loosened unthread tip by hand If front packing and or front impinger remain on valving rod when pattern control tip is removed release trigger and carefully slide these parts off valving rod 16 3 Remove front impinger from front packing It is not necessary to remove front packing if no damage to packing is evident or suspected Front Impinger Front Packing Pattern Control Tip 4 Remove pattern control tip o ring and front packing from pattern control tip If packing cannot be removed by hand use pliers However this will require replacement of packings D e 2 Pattern Control Tip Front Impinger Front Packing 5 Use pattern control tip cleanout tool to clean inside walls of tip Flush tip and clean surrounding external surface 6 Set pattern control tip and front impinger and pack ing aside Reassembly instructions are included in Impingers page 19 Screen Screw and Port Closure Plugs 1 Perform Pattern Control Tip steps see page 16 Use a 5 16 in nut driver to remove screen screw mounting screw while holding large hex head of screen screw with finger or against solid surface 312888D 3 Slide screen screw assembly out of gun block Allow excess lIsocyanate material to drain Port Closure Plug
25. tern Control Tip page 16 3 Remove coupling block and check valves see Cou pling Block and Check Valves page 18 4 Remove rear impinger and throat Impingers page 19 5 Remove gun block mounting screws 6 Remove resin rear seal screw and resin seal o rings 312888D 7 Soak gun block in gun cleaner CAUTION Do not allow gun block or component parts to soak in gun cleaner for extended periods of time such as overnight as certain solvents may cause corrosion or pitting Do not soak gun block o rings in gun cleaner To clean o rings dip in gun cleaner and immediately wipe dry 8 Reassemble resin rear seal screw and resin seal o rings into gun block 9 Reinstall gun block using gun block mounting screws Pressure Check Valving Rod Resilient Sleeve Perform this test to check seal created by interference fit between resilient sleeve and opening in throat 1 Follow Pressure Relief Procedure page 12 2 Remove the pattern control tip and front impinger see Pattern Control Tip page 16 3 Remove coupling block and check valves see Cou pling Block and Check Valves page 18 4 Remove rear impinger and throat Impingers page 19 5 Turn on proportioner and with only the resin manual valve open determine if there are resin leaks at front Iso surface of throat Should be protruding 312888D Repair 6 Set safety stop to SERVICE CLOSED and then pull trigger to
26. that should be maintained to control vis cosity Only one component coming out of gun Filter screens are clogged Flush gun See Flush Gun page 14 Poor spray pattern Materials in proportioner are too vis COUS Check with material supplier for rec ommended temperature range that should be maintained to control vis cosity Impinger slots are clogged See Impingers page 19 for service instructions Minor weepage around throat in gun block 312888D Valving rod is worn Perform Pressure Check Valving Rod Resilient Sleeve procedure see page 21 Valving rod or throat is damaged Perform Pressure Check Valving Rod Resilient Sleeve procedure see page 21 15 Repair Repair 2 A M CAUTION before servicing gun Clean A and R components in separate containers to avoid cross contamination Shutdown proportioner and allow chemicals to cool Tools Required flush can impinger cleanout brush 5 16 in nut driver utility knife pin vise without cleanout spade gun block component hole cleanout brush check valve removal tool throat wrench pattern control tip front impinger packing seal cleanout tool gasket removal tool wooden stick pry tool rear impinger wrench pressure flush kit optional Pattern Control Tip 1 Setsafety stop to SERVICE CLOSED CAUTION while removing pattern control tip If it is not the re
27. those supplied with your system e Never use reclaimed solvents which may contain moisture Always keep solvent containers closed when not in use e Never use solvent on one side if it has been contam inated from the other side e Always lubricate threaded parts with ISO pump oil or grease when reassembling Keep Components A and B Separate Material Self ignition CAUTION To prevent cross contamination of the equipment s wetted parts never interchange component A isocy anate and component B resin parts Some materials may become self igniting if applied too thickly Read material manufacturer s warnings and material MSDS Moisture Sensitivity of Isocyanates Isocyanates ISO are catalysts used in two component foam and polyurea coatings ISO will react with moisture such as humidity to form small hard abrasive crystals which become suspended in the fluid Eventually a film will form on the surface and the ISO will begin to gel increasing in viscosity If used this partially cured ISO will reduce performance and the life of all wetted parts The amount of film formation and rate of crystalli zation varies depending on the blend of ISO the humidity and the temperature To prevent exposing ISO to moisture e Always use a sealed container with a desiccant dryer in the vent or a nitrogen atmosphere Never store ISO in an open container 312888D F
28. tion damage or wear caused by the incompatibility of Graco equipment with structures accessories equipment or materials not supplied by Graco or the improper design manufacture installation operation or maintenance of structures accessories equipment or materials not supplied by Graco This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification of the claimed defect If the claimed defect is verified Graco will repair or replace free of charge any defective parts The equipment will be returned to the original purchaser transportation prepaid If inspection of the equipment does not disclose any defect in material or workmanship repairs will be made at a reasonable charge which charges may include the costs of parts labor and transportation THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE Graco s sole obligation and buyer s sole remedy for any breach of warranty shall be as set forth above The buyer agrees that no other remedy including but not limited to incidental or consequential damages for lost profits lost sales injury to person or property or any other incidental or consequential loss shall be available Any action for breach of warranty must be brought within two 2 years of the date of sale G
29. tor Phone 612 623 6921 or Toll Free 1 800 328 0211 Fax 612 378 3505 All written and visual data contained in this document reflects the latest product information available at the time of publication Graco reserves the right to make changes at any time without notice This manual contains English MM 312888 Graco Headquarters Minneapolis International Offices Belgium China Japan Korea GRACO INC P O BOX 1441 MINNEAPOLIS MN 55440 1441 Copyright 2008 Graco Inc is registered to I S EN ISO 9001 WWW graco com Revised 11 2008
30. ufacturer s replacement parts only e Donotalter or modify equipment e Use equipment only for its intended purpose Call your distributor for information e Route hoses and cables away from traffic areas sharp edges moving parts and hot sur faces e Do not kink or over bend hoses or use hoses to pull equipment e Keep children and animals away from work area e Comply with all applicable safety regulations 4 312888D Isocyanate Hazard m Mw aes Spraying materials containing isocyanates creates potentially harmful mists vapors and atomized par ticulates Read material manufacturer s warnings and material MSDS to know specific hazards and precautions related to isocyanates Prevent inhalation of isocyanate mists vapors and atomized particulates by providing sufficient ventila tion in the work area If sufficient ventilation is not available a supplied air respirator is required for everyone in the work area To prevent contact with isocyanates appropriate per sonal protective equipment including chemically impermeable gloves boots aprons and goggles is also required for everyone in the work area Isocyanate Hazard e Keep the ISO lube pump reservoir if installed filled with Graco Throat Seal Liquid TSL Part 206995 The lubricant creates a barrier between the ISO and the atmosphere e Use moisture proof hoses specifically designed for ISO such as
31. valve removal tool 612 remove iso check valve 13 Clean all parts with solvent then blow dry with com pressed air and reassemble 14 Flush Gun 2 To avoid static sparking that may result in fire or explo sion ensure all equipment in flushing procedure is grounded Do not flush on or near foamed or coated surfaces 1 Set safety stop to SERVICE CLOSED 2 Close both manual valves 3 Loosen screen screw and then remove by hand 4 Use flush can to thoroughly flush screen screw and screen screw Cavity 5 Service gun by following Troubleshooting proce dures page 15 Trigger Gun While Disconnected During gun maintenance it may be helpful to trigger the gun while the electrical harness is disconnected To do so perform the following steps 1 Connect gun to air supply 2 Using a small allen key insert the small end into the center hole of the exhaust valve cap 217 located behind the trigger 3 Pull trigger to depress allen key into muffler and activate the valving mechanism The gun should trigger and the valving rod should pull back 312888D Troubleshooting Troubleshooting Problem Cause Solution Interruption of flow of one material Running out of material Supply more material to proportioner Change of color in mixed product Materials in proportioner are too vis COUS Check with material supplier for rec ommended temperature range
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