OPERATION MAINTENANCE SERVICE MANUAL
Contents
1. 18 16 x 7 1274 x 71 2 P Style 1214 Xx TA PA reri treni c Brake component Lubrication Brake Component Lubrication Lubrication Guidelines Frequency of Service S Maintenance Suggested Preventative 25 Every 1 000 Miles Every 12 000 Miles Every 25 000 to 30 000 Miles ess Every 100 000 Miles Once a Year or at Brake Reline 25 Specifications Fastener Specifications Chart 26 Replacement Parts Kits Replacement PartS K tS c1 1S1 11T vS 27 Brake Shoe Hardware Kits 27 Brake Block Kits 27 Camshaft Repair Kits 27 Shoe amp Block Assemblies G1 21112 1S SH HH HH key 27 Warranty Dexter Axle Limited Warranty n HH HH k t 28 Axle Identification Axle IdentifiCatiOn 1160440104081 006010311024 ei eid 31 Important Safety Notice Appropriate service methods and repair procedures are essential for the safe reliable operation of all running gear as well as the personal safety of the individual doing the work This manual provides general directions2. extreme care must be exercised to obtain correct location and ensure the spring seat load bearing surfaces are parallel to each other Axle Beam Repair Welding In the interest of safety and preserving the service life of trailer axle assemblies Dexter recommends that trailer axle beams NOT be repair welded Repair welding can detract from the structural integrity of an engineered component particularly on heat treated parts where the benefit of the processing may be nullified by the welding Therefore a new replacement beam should be installed as soon as possible Preheating Requirements Absolutely no welding should be done on axles that are below 50 F Before welding on suspension components or any other part onto the axle the area within 3 of the attachment point should be warmed slowly to between 500 600 F Immediately after checking the temperature with an appropriate temperature sensitive crayon the part s should be tack welded in place Recheck the temperature and if below 475 F reheat to 500 600 F and complete welding per welding instructions How Welding Affects Axle Beam Material All welds made on the beam create in effect an extremely localized heat treatment of the metal The heat generated Nad Welding during the welding process can cause the material in the HAZ heat affected zone to become hardened or brittle This effect can impart an undesirable characteristic to the normally ductile str
3. Mfg Company Royal 98 Multi Lube EP 2 Lithium Complex Chevron Texaco Chevron Ulti Plex Grease EP NLGI 2 Texaco Starplex Moly MPGM 2 Chem Arrow Corp Arrow 78981 1 Valvoline Valvoline Multi Purpose GM Div of Ashland Inc Great Plains Lubricants Lithium Complex EP Grease NLGI 2 Oil SAE 90 SAE 80W 90 SAE 75W 90 Approved Oil Sources Ashland Oil Valvoline Dura Blend Valvoline Power Lube CITGO Petroleum Co Premium Gear Oil MP Mystik JT 7 Mystik Power Lube Exxon Company USA Gear Cil GX 80W 90 Industrial Oils Unlimited Super MP Gear Oil 80W 90 Kendall Refining Co Kendall NS MP Hypoid Gear Lube Lubriplate Division Lubriplate APG 90 Fiske Brothers Refining Mobil Oil Corporation Mobilube SHC Mobil 1 Synthetic Gear Lube Phillips 66 Petroleum Superior Multi Purpose Gear Oil Philguard Gear Oil Philsyn Gear Oil Pennzoil Products Co Gear Plus 80W 90 GL 5 Gear Plus Super 75W 90 Gear Plus Super EW 80W 90 Multi Purpose 4092 Gear Lube Oil Center Research Liquid O Ring 750 GX Sun Refining and Sonoco Ultra Marketing Company Sonoco Dura Gear Wheel Bearings Shell Oil Company Spirax A Spirax G Spirax HD Spirax S Oil Company Multigear EP Multigear SS 984M Division Multigear Select Gear Royal Manufacturing Union Oil Company Unocal MP Gear Lube 76 Triton Syn Lube EP S uI1e8 Recommended Adjustment Procedure 1 Grease bracket an
4. brake components servicing as necessary 21 Mad Reassembly Brake Assembly Disassembly 1 Install new camshaft bushing Ream bushing to 1 505 1 515 if required Install camshaft seals into the spider Lubricate roller bore with anti seize and install new cam roller assemblies onto the brake shoes Note The head of roller pin should face the camshaft D washer once shoes are installed on spider 3 Install shaped camshaft washer onto the camshaft 13 14 15 Install the camshaft into the spider Install 005 075 00 washer and lock ring retainer on the camshaft before sliding the camshaft through the camshaft support bracket Install the slack adjuster and 005 134 00 washer and 069 078 00 lock ring retainer for 28 spline camshafts or 005 075 00 washer and 069 020 00 lock ring retainer for 10 spline camshafts Lubricate anchor pin notches with anti seize lubricant Install W shaped retractor spring retainer pin into the 0 50 diameter shoe web holes near the camshaft roller end of the shoe Install retractor spring between shoes Place top shoe onto spider as in service Pivot bottom shoe on the camshaft head and twist the shoe 90 under the spindle properly placing shoe on the spider as in service Install two 2 keeper springs on the anchor end of the shoes Lubricate anchor pin bores and shoe anchor pins with anti seize lubricant Repea
5. diminish as the horizontal center line of the beam is approached In addition the torsional stress imparted by braking action of the wheels is taken into consideration in rating the axle capacity An allowance of both stresses bending beam load and torsional are factored into the calculations to provide an acceptable design factor The stresses are reapplied and reversed many times during normal axle beam life For this reason the beam material must have certain properties such as impact strength that permit it to absorb shock to flex and then to resume its original and normal as manufactured condition Hulpiam When welding it is necessary to avoid the high stress areas on the tube top side compression zone and tube bottom side tension zone All welds should be made as close to the horizontal center line as possible When the axle tube is subjected to the heat from welding and then rapid cooling the material adjacent to the weld loses it s desirable ductile properties and becomes brittle If this condition exists in the high stress areas under maximum load conditions the life of the axle will be greatly reduced and premature fatigue failure can occur Recommended locations for the welds are shown below Spring Seat Placement and Location One of the most critical and important phases of vehicle fabrication is the placement location and attachment of spring seats on the axle Overhang is defined as axle trac
6. for performing service and repair work with tested effective techniques Following these guidelines will help assure reliability There are numerous variations in procedures techniques tools parts for servicing axles as well as in the skill of the individual doing the work This manual cannot possibly anticipate all such variations and provide advice or cautions as to each Anyone who departs from the instructions provided in this manual must first establish that they neither compromise their personal safety nor the vehicle integrity by their choice of methods tools or parts Refer to your vehicle manufacturer s owners manual for additional procedures techniques and warnings prior to performing any maintenance or repairs This is the safety alert symbol It is used to alert you to potential injury hazards Obey all safety messages that follow this symbol to avoid possible injury or death 011210011 Installation Installation assure safe operation and maximum durability of parts such as brake linings and tires it is necessary to position and install the axle properly It is recommended that the axle assembly be installed so that camshafts rotate in the same direction as the wheels Installation in which the camshaft rotation is opposite that of wheel rotation could cause noisy brakes chatter and wheel hop With this thought in mind the axle should be ordered with placement of air chamber and slack adjust
7. severity of service For off highway use service every 4 months depending on severity of service Note Reline shoes or replace with new shoe and lining assemblies when the linings are grease saturated 24 Suggested Preventative Maintenance Every 1 000 Miles Check oil level in wheel hub and inspect wheel for leaks 892UEU81UIBII Every 12 000 Miles Check brake adjustment Repack wheel bearings grease application Every 25 000 to 30 000 Miles Check lining wear and estimate reline time Inspect camshaft camshaft spider bushing and camshaft support bracket bushing for any signs of wear Lubricate brake actuating components Every 100 000 Miles Once a Year or at Brake Reline Replace wheel bearing lubricating oil if applicable Check brake air chambers and slack adjusters Inspect brake rollers roller shafts anchor pins and bushings and replace if necessary 25 Fastener Specifications Size amp Part Name Thread Torque Spindle Nut Inner Ig ER 2 16 Refer to Bearing Adj Section Outer sm 254 16 250 300 Ft Lbs Grease Zerk Cam Bushing 7 28 UNF 5 15 In Lbs Spider 1 27 NPT 5 8 Ft Lbs Hex Nut Air Chamber 5 85 95 Ft Lbs Mounting Nuts AI Models eH Locknut 120 140 Ft Lbs Anchor Pin 1214 Dia gt Clamp Bolt A Brakes s m 2 1672 Dia Dust Shield Air Brakes 5 Mounting w Tapped 16 18 5 10 15 Ft Lbs Spiders Hub Cap All Models 10 15 Ft Lbs Dr
8. OPERATION MAINTENANCE SERVICE MANUAL Heavy Duty Axles amp Related Components For Models 0 2112 D 2L16 D 2M12 D 2M16 D 2H12 D 2H16 ll DEXTER AXLE www dexteraxle com Introduction This manual is designed to provide information for you to understand use maintain and service your trailer running gear system Your axles are manufactured by Dexter Axle The Dexter product line the most complete in the industry is the result of over 40 years of experience in the design testing and manufacturing of trailer axles The Dexter running gear system consists of spindles hubs drums and brakes which are engineered to provide you the finest towing and stopping performance currently available in the industry today Two Dexter philosophies are at work to provide you the best product available and have enabled us to maintain our position of leadership First we operate on the theory that there is always a better way for a product to operate to be manufactured and or to be serviced We are constantly striving to find that better way Secondly we maintain wall to wall production control so that all the major components of your running gear system are manufactured in Dexter facilities under our strict quality control standards These manufactured components include the axle beam hubs drums spindles brakes magnets and most of the steel stampings used in the attachment of your axle to your trailer Dexter has the most com
9. ack bearing cones is as follows 1 Place a quantity of grease onto the palm of your hand 2 Press a section of the widest end of bearing into the outer edge of the grease pile closest to the thumb forcing grease into the interior of the bearing between two adjacent rollers 3 Repeat this while rotating the bearing from roller to roller 4 Continue this process until you have the entire bearing completely filled with grease 5 Before reinstalling apply a light coat of grease onto the bearing cup mating surface 984M S uI1e8 Oil Lubrication Oil should be changed at least once year or 100 000 miles or whenever the seals or brakes are replaced Oil level should be inspected every 1 000 miles Always allow a few minutes after adding oil or after vehicle operation for the oil to settle when establishing the required oil level Adjustment 1 After properly installing the bearings and seals according to the manufacturer s recommendations tighten the inner spindle nut to 100 Ft Lbs while rotating the hub to insure proper seating of the bearings cups and seal in the wheel hub You must follow the maintenance procedures to prevent damage to important structural components Damage to certain structural components such as wheel bearings can cause the wheel end to come off of the axle Loss of a wheel end while the trailer is moving can cause you to lose control and lead to an accident which can
10. all brakes release to the normal relaxed position Note green brake is an unground unburnished brake Normal manufacturing tolerances dictate that there is a break in period required after which the lining will seat into a perfect concentric situation During this break in period the user must be aware that additional brake adjustments will be mandatory to achieve optimum braking performance Juawsn py ayeig Brake Assembly Disassembly Recommended Brake Assembly Disassembly Procedure Although Dexter Axle supplies non asbestos brake linings as standard equipment asbestos linings may still be found on axles in service POTENTIAL ASBESTOS DUST HAZARD Some older brake linings may contain asbestos dust which has been linked to serious or fatal illnesses Certain precautions need to be taken when servicing brakes 1 Avoid creating or breathing dust 2 Avoid machining filing or grinding the brake linings 3 Do not use compressed air or dry brushing for cleaning dust can be removed with a damp brush Assembly Disassembly Procedure 1672 x 7 Brakes Disassembly 1 Block and secure trailer on adequate capacity jack stands Follow trailer manufacturers recommendations for lifting and supporting the unit Check that the wheel and drum rotate freely Release brake and back off slack adjuster Remove wheel equipment Remove slack adjuster lock ring and slack adjuster a Remove brake dr
11. aser that its Nev H LubeTM bearings and the suspension components only of its Torflex axles shall be free from defects in material and workmanship for a period of five 5 years from the date of first sale of the trailer incorporating such components LIMITED 7 YEAR WARRANTY Dexter Axle warrants to the original purchaser that its Predator Series electric brake controllers shall be free from defects in material and workmanship for a period of seven 7 years from the date of purchase EXCLUSIVE REMEDY Dexter Axle will at its option repair or replace the affected components of any defective axle repair or replace the entire defective axle or refund the then current list price of the axle In all cases a reasonable time period must be allowed for warranty repairs to be completed Allowance will only be made for installation costs specifically approved by Dexter Axle WHAT YOU MUST DO In order to make a claim under these warranties 1 You must be the original purchaser of the vehicle in which the Spring Suspension Axles or Torflex Axles were originally installed 2 You must promptly notify us within the warranty period of any defect and provide us with the axle serial number and any substantiation which may include but is not limited to the return of part s that we may reasonably request 28 AugeueMw 3 The axles or suspensions must have been installed and maintained in accordance
12. d spider fittings Care must be exercised to prevent grease from coming in contact with brake linings which could result in reduced braking performance 2 Adjust the slack adjuster until the brake lining comes into contact with the brake drum A For green brakes there should be a slight amount of wheel drag at initial adjustment to compensate for any lining irregularities high spot etc B For burnished or broken in brakes back off the slack adjuster to achieve 030 clearance between drum and shoes 3 Apply brakes using normal truck operating pressure average line pressure should be 90 psi USE OF AIR PRESSURE IN EXCESS OF 130 PSI COULD RESULT IN FAILURE OF THE AIR CHAMBER OR SPRING Brake Adjustment BRAKE CHAMBER AND RESULT IN INJURY A Check the amount of push rod travel Maximum should not exceed 2 for Type 30 chambers and 134 for Type 24 chambers 1 Optimum push rod travel on a green brake should be under 2 2 Optimum push rod travel on a burnished or broken in brake should be under 134 B With air pressure applied to brakes check for lining to drum contact The contact should approach 100 Use 010 feeler gauge if in doubt It should not fit between the lining and drum during brake application C Check to ensure the lining is inside the drum during application More than 06 hanging out of the drum is not recommended Release air pressure from the brakes and confirm that
13. er assemblies that will insure the correct directional rotation of the camshafts when the axle is installed see page 8 It is the responsibility of the axle installer to adjust the brakes properly The recommended adjustment procedure is covered in the section pertaining to brakes Responsibility for proper axle alignment lies with the axle installer The axle must be installed so that it will be parallel to the drive axle s of the tractor This will allow good vehicle control when cornering longer tire wear and it will eliminate dog tracking Alignment can be determined by measuring from the center of the trailer king pin to the center of each end of the axles The difference should not vary by more than 1 6 In the case of multiple axles the axles must also be in line with each other The difference between the centers of one axle and the centers of the other axle must not vary more than 1 4 General Welding Recommendations Dexter tubular axles are made of high strength steel for better fatigue life and superior welding qualities The round tubular axles provide a uniform section modulus no matter how the beam is rotated uIPI2jM Brake spiders are positioned and welded to exacting specification requirements at our factory Ring welding the spider directly to the axle beam provides a higher strength and more reliable brake attachment over bolt on versions In welding suspension component parts to Dexter trailer
14. k minus spring center dimension divided by two T S C 2 The maximum spring center is calculated such that recommended inside of tire or drum clearance to vehicle frame is achieved Permanent deformation and or premature failure of the axle may result if the spring centers are too narrow aD SNOIIVH3dO AVMH IH 3HI M3AO WONWOO 1507 S419 U9 2 NOILVLOY 133HM ED ML DADMAO SIXD 0 9 dn 9 SI uOnisod 1 DuSUID2 UOID1O1 sjupuponb euoz SIXD DJjnou 91D 550 uIPI9M Weld Placement Recommendation for Welding Spring Seats to Round Axles Note If spring seat and related U bolt clamp parts are different than shown refer or consult with suspension manufacturer for weld recommendations Do not weld in this area 3 00 TOP r 2 00 MAX Fog 1 50 MAX 400 BOTTOM Do not weld in this area The welding rods should conform to AWS American Welding Society grade E 7018 Oven Dried or comparable Recommended rod size is 952 at voltage and amperage recommended by the electrode manufacturer For maximum strength a three pass weld should be used The arc should not be broken at the end of each pa
15. mber of the axle available when you call On all axles produced after April 2001 this nine digit number can be found on the rear side of the axle beam approximately 18 from the curb side of the vehicle Look for the words DEXTER AXLE and the lot number will be located directly under the name Recreational Vehicle axles that have been certified for use in Canada will also bear the letters CSA 9 XV 31 Dexter Online Parts Store From magnet and seal kits to complete brake and hub kits Dexter offers a complete line of genuine replacement parts for your trailer Most products are available in stock and ready to ship within 24 hours direct to you from the factory With dedicated customer support quick turnaround and a 30 day money back guarantee the Dexter Online Parts Store helps keep your trailer going Hub Components Brake Components Suspension Components Complete Hub Kits Brake Assemblies amp Kits Brake Controllers amp Actuators Ready for Immediate Shipment Direct to Your Door Visit us online at www dexteraxle com Service Record Date Service Performed Mileage Service Record Date Service Performed Mileage Notes Notes Genuine Dexter axles and components available nationwide from our plant locations listed below or through our network of distributors Check our web site for the distributor nearest you 2900 Industrial Parkway East Visit
16. or product in the event an axle or any componert of the is discontinued is otherwise unavailable 3 These warranties are nontransferable GENERAL THE FOREGOING WARRANTIES ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES EXCEPT THAT OF TITLE WHETHER WRITTEN ORAL OR IMPLIED IN FACT OR IN LAW INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE These warranties give you specific legal rights and you may also have other rights which vary from state to state THE DURATION OF ANY IMPLIED WARRANTIES INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED TO THE DURATION OF THE EXPRESS WARRANTIES HEREIN DEXTER AXLE HEREBY EXCLUDES INCIDENTAL AND CONSEQUENTIAL DAMAGES INCLUDING LOSS OF TIME INCONVENIENCE LOSS OF USE TOWING FEES TELEPHONE CALLS OR COST OF MEALS FOR ANY BREACH OF ANY EXPRESS OR IMPLIED WARRANTY INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of incidental or consequential damages so the above exclusion or limitation may not apply to you Inquiries regarding these warranties should be sent to Dexter Axle P O Box 250 Elkhart Indiana 46515 30 Axle Identification In the unlikely event that you should require service assistance from Dexter Axle please have the lot nu
17. plete state of the art manufacturing facilities which enable us to provide you the trailer owner with the finest product possible For all your running gear needs Look finettoDenter Visit us online at www dexteraxle com Table of Contents Introduction Important Safety NotiGe HH HH HH HH HH ng 3 Installation INStallatiONN REK NEN GR 4 Welding General Welding Recommendations eee 5 Axle Beam Repair Welding lt lt 1 1S r y 5 Preheating Requiremens HH nong kh 5 How Welding Affects Axle Beam 5 Welding Guide seen 6 Stress of Axle Be ms eere eee eren 6 Spring Seat Placement and Location 7 Weld Placement Recommendation esee 9 Wheel Bearings Wheel Bearings oie rer entere eerte ta mr Ere 11 Grease Lubrication id Oil Lubrication 12 Adjustment eror teer reor wud 2 Recommended Wheel Bearing Lubrication Specs 13 Brake Adjustment Recommended Brake Adjustment Procedure 16 Brake Assembly Disassembly Recommended Brake
18. rea by slowing the rate of cooling thus reducing the formation of an untempered martensitic grain structure adjacent to the weld Martensite a brittle grain structure is formed by the rapid cooling of the metal surrounding the weld area Preheat the suspension seat weld area to 500 600 F prior to welding Preheated temperature should be verified with a temperature sensitive crayon or appropriate means The above welding recommendation pertains to all Dexter Axle Company axle beams Unapproved variation from the procedures listed will void the axle warranty and could result in an unsafe weld Wheel Bearings Periodic inspection and regular replacement of lubricant is important to obtain maximum bearing life Always inspect bearings for damage prior to installation When installing wheel bearings it is important to ensure both the inside of the wheel hub cavity bearings and grease cap are clean It is also recommended that seals be replaced when wheel hubs have been removed for service EXTREME CARE SHOULD BE TAKEN WHEN REINSTALLING WHEEL HUBS TO PREVENT DAMAGE TO THE SEALS DO NOT CONTACT RUBBER SEALING LIP WITH THE SPINDLE THREADS Grease Lubrication Grease should be replaced every 12 000 miles or 12 months Prior to repacking bearings all old grease should be removed from the wheel hub cavity and bearings Bearings should be packed by machine If machine is unavailable packing by hand method is acceptable The method to p
19. result in serious injury or death 2 Loosen the inner spindle nut to remove pre load torque 3 Hand tighten the inner adjustment nut then back off 1 4 turn 36 turn maximum 4 Install lock ring lock ring must engage pin on inner spindle nut Nut to engage nearest pin hole 5 Install tab washer and outer locknut Torque outer spindle nut to 250 300 Ft Lbs Bend 3 tabs over outer nut flats to secure 6 This procedure should assure an end play of 001 to 010 which must be present in the adjusted wheel bearing assembly Wheel Bearings Recommended Wheel Bearing Lubrication Specifications Grease Thickener Type Lithium Complex Dropping Point 215 C 4192 Minimum NLGI No 2 1894 M EP Corrosion amp Oxidation Inhibitors Viscosity Index Approved Grease Sources 76 Lubricants Company 76 Multiplex EP 76 Multiplex RED Citgo Petroleum Corp Lithoplex MP 2 Lithoplex CM 2 Exxon Company USA Kendall Motor Oil Kendall Super Blu L427 Grease Div of Witco Corp Mobil Oil Company Mobil Grease HP Mobilith AW 2 Mobil Synthetic Grease Mystik Oil Company Inc Mystik JT 6 Hi Temp Grease Red Lithium Complex EP No 2 Mystik SX 6 Synthetic Blend Extreme Range Low Temp Blue Lithium Complex Oil Center Research Liquid O Ring No 167L of Oklahoma Pennzoil Quaker State Synthetic Red Grease Company ALBIDA LC 2 ALBIDA Grease SLC 220 ALBIDA Grease SLC 460 Royal
20. ring retainer on camshaft before sliding the camshaft through the camshaft support bracket Install the slack adjuster washer and lock ring retainer 20 Install shoes anchor pins and spacers onto spider Install anchor lock rings Install retractor spring Tighten anchor pin anti rotation screw if applicable Connect slack adjuster to brake chamber pushrod Reinstall wheel equipment per manufacturers instructions Adjust brakes as outlined in brake adjustment procedures Note Always use new springs when servicing brakes Always use Dexter shoes when replacing shoes Assembly Disassembly Procedure 12 x 71 2 Brakes PQ Style Disassembly 1 Block and secure trailer on adequate capacity jack stands Follow trailer manufacturers recommendations for lifting and supporting the unit Check that the wheel and drum rotate freely Release brake and back off slack adjuster Remove wheel equipment Lift top shoe upward to disengage the shoe webs from the anchor pin Remove anchor pin Repeat procedure 4 for the bottom shoe Remove brake keeper springs Unwrap bottom shoe by pivoting the shoe on the camshaft head and twisting the shoe 90 under the spindle Remove shoe assemblies from spider Remove slack adjuster lock ring disconnect slack clevis and then remove slack adjuster Ajquassesig Ajquassy ayeig Remove camshaft lock ring spacer washer s and camshaft Completely inspect all
21. ss and the corners should be wrapped The electrode should be backed up to fill in the crater at the end of each pass If the arc is broken between passes thoroughly clean the weld between each pass Process _ Shielded metal arc welding of carbon A W S E70XX and low alloy steels Gas metal arc welding of carbon and A W S ER70S X low alloy steels Submerged arc welding of mild and A W S F 72 XXXXX low alloy steels American Welding Society Welding Do not bring axles in from non heated storage and weld while cold Do not test the arc on the axle beam Fillets up to 1 2 can be used Maximum gap 030 inch The attachments should fit up as close to the beam as possible to avoid excessive welding Electrical grounding to the axle for welding purposes should be done on one of the attachments such as the air chamber bracket cam support or brake spider Connections should be clean and tight Loose or dirty connections will cause arcing at that point during welding These small arced areas can create the potential for failure in highly stressed structures Therefore grounding should never be done directly on the axle tube Never attach the ground to an area that would allow the ground path to pass through the spindles bearings hub or wheel components To provide optimum suspension to tube welds preheating is recommended Preheating will minimize loss of the ductile properties in the weld a
22. t procedure 10 for the bottom shoe Lift top shoe upwards to clear anchor pin hole Install anchor pin Connect slack adjuster to brake chamber pushrod Lubricate cam bushings and slack adjuster Reinstall wheel equipment per manufacturers instructions 22 16 Adjust brakes as outlined in brake adjustment procedures Note Always use new springs when servicing brakes Always use Dexter shoes when replacing shoes 23 Ajquassesig Ajquassy 93618 Brake Component Lubrication Brake Component Lubrication A schedule for the periodic lubrication of brake components should be established by the operator on the basis of past experience and severity of operation Lubrication Guidelines For camshaft roller journals Lubricate with high temperature anti seize grease For anchor pins Lubricate with high temperature anti seize grease For manual slack adjusters Lubricate with NLGI Grade 2 For automatic slack adjusters Lubricate with ASA manufacturers recommended lubricant FOR MANUAL SLACK ADJUSTERS Lubricate with NLGI Grade 2 FOR AUTOMATIC SLACK ADJUSTERS Lubricate with ASA manufacturers recommended lubricant Anchor Pins and Roller Journals Lubricate with high temperature anti seize grease Spider and Support Bushings Lubricate with NLGI Grade 2 Frequency of Service Camshaft roller journals anchor pins slack adjusters every 25 000 to 30 000 miles or every six months depending on
23. ucture This small hardened area becomes the weakest part of the beam and therefore is the area most susceptible to failure The axle beam is no stronger than its weakest section As evident from the sketch on page 9 the welds should be horizontal and as near as possible to the front and rear horizontal center line of the axle beam Always avoid welds that are circumferential in nature below the horizontal center line Welding Guide Dexter supplies axles to customers in all stages of assembly from the beam with spindles only to the complete axle assemblies In the final analysis and with few exceptions we have little or no control over later assembly of incomplete units by the trailer fabricator and therefore we can not be responsible for warranty on improperly processed components Stress of Axle Beams The main loaded stresses on a beam are expressed as three primary stress zones The compression stress zone top side the tension stress zone bottom side and the neutral stress zone front and rear horizontal center line commonly referred to as the neutral axis COMPRESSION SIDE Vertical Centerline Neutral Axis Horizontal Centerline TENSION SIDE The above is a graphic representation of the degrees of stress in the wall of the tube when the beam is under load The length of the arrows X represents the amount of stress at a given point From this illustration it is evident that the two opposite stresses
24. um if outboard mount Remove hub and drum assembly if inboard mount Disengage the roller retainers from the rollers 7 Press down on the bottom brake shoe and remove the lower cam roller Lift the top shoe and take out the top cam roller 10 11 Lift out the shoe retractor spring which is now free of tension Swing the lower shoe back approximately 180 to relieve the tension on the shoe keeper springs Remove the springs and slip the shoes off the anchor pins Remove camshaft lock ring spacer washer s and camshaft After removing the shoes completely inspect all brake components servicing as necessary Reassembly 1 Install new anchor pin bushings camshaft bushing and camshaft seals into the spider Install cam roller retainer clip and retractor spring retainers onto the brake shoes Install thick camshaft washer onto the camshaft 4 Install the cam shaft into the spider Install spacer washer and lock retainer camshaft before sliding the camshaft through the camshaft support bracket Install the slack adjuster washer and lock ring retainer Install the brake keeper springs onto the shoes Install shoes onto the spider by placing shoes in place on the anchor pins then wrap the two shoes into place about the spider Install the shoe retractor spring onto the shoes Connect slack adjuster to brake chamber pushrod Reinstall wheel equipment per manufact
25. um Mounting Screw 1214 Dia 5 160 180 Ft Lbs Backnut 16 Dia 5 175 200 Ft Lbs Wheel Nut Inner 10 on 11 5 or 8 steel or 8 450 500 Ft Lbs Outer 10 on 8 450 500 Ft Lbs 10 on 285 75 22mm x 1 5 10 9 450 500 Ft Lbs Flange Nuts or 8 on 275mm Demountable Refer Manf Specifications 26 Replacement Parts Kits Brake Shoe Hardware Kits one brake 12 x 712 P Style K71 098 00 124 x 7 PQ Style K71 460 00 16 x 7 Style K71 136 00 Brake Block Kits AT one Brake 12 x 71 2 P and PQ Style K71 133 00 16 x 7 Q Style K71 138 00 Camshaft Repair Kits Ar one brake 12 x 71 2 P and PQ Style K71 101 00 16 x 7 Q Style K71 135 00 Shoe amp Block Assemblies 12 x 7 P Style 040 175 01 12 x 7 PQ Style 040 320 01 16 x 7 Style 040 180 00 27 1u8u182E 09H Warranty Dexter Axle Limited Warranty WHAT PRODUCTS ARE COVERED All Dexter trailer axles suspensions and brake control systems excluding Dexter 6000 series Manufactured Housing Axles LIMITED 2 YEAR WARRANTY Dexter Axle warrants to the original purchaser that its axles suspension systems and E H hydraulic brake actuators shall be free from defects in material and workmanship for a period of two 2 years from the date of first sale of the trailer incorporating such components LIMITED 5 YEAR WARRANTY Dexter Axle warrants to the original purch
26. urers instructions Adjust brakes as outlined in brake adjustment procedures Note Always use new springs when servicing brakes Always use Dexter shoes when replacing shoes Ajquassesig Ajquassy ayeig Assembly Disassembly Procedure 1214 x 712 Brakes P Style Disassembly Brake Assembly Disassembly 1 s _ MON OO Block and secure trailer on adequate capacity jack stands Follow trailer manufacturers recommendations for lifting and supporting the unit Check that the wheel and drum rotate freely Release brake and back off slack adjuster Remove wheel equipment Remove slack adjuster lock ring and slack adjuster Remove hub and drum assembly Remove anchor pin anti rotation bolt if applicable Remove anchor pin retainers and washers Remove anchor pins and brake shoes Remove brake return springs Remove camshaft lock ring spacer washers s and cam shaft Remove roller pin retainers 12 13 14 roller pins rollers from shoes Remove camshaft bushings and seals from spider After removing the shoes completely inspect all brake components servicing as necessary Reassembly 1 Install new camshaft bushing and camshaft seals into the spider Install cam roller assemblies onto the brake shoes 3 Install shaped camshaft washer onto the camshaft Install the camshaft into the spider Install spacer washer and lock
27. us online at www dexteraxle com Dexter Axle 11870 650 East Dexter Axle 222 Collins Rd Fax 260 982 7511 Elkhart IN 46516 Ph 260 982 4047 Fax 574 295 8094 Ph 574 295 1900 Dexter Axle 1 Municipal Dr Dexter Axle 1400 Victoria Ave Carrollton MO 64633 e San Bernardino CA 92408 Fax 660 542 1133 Fax 909 799 6258 Ph 660 542 2232 Ph 909 796 2908 Dexter Axle 500 S E 27th St El Reno 73036 405 262 9089 Ph 405 262 6700 Company Headquarters Elkhart IN 46516 Fax 574 295 8666 Ph 574 295 7888 DEXTER AXLE N Manchester IN 46962 Dexter Axle j West Pearl St Fremont IN 46737 Fax 260 495 1701 Ph 260 495 5100 Dexter Axle Road 75 East Albion IN 46701 Fax 260 636 3030 Ph 260 636 2195 Dexter Axle Perimeter Rd Monticello GA 31064 Fax 706 468 2966 Ph 706 468 6495 NO PART OF THIS CATALOG MAY BE REPRODUCED WITHOUT DEXTER AXLE S PERMISSION ALL PART NUMBERS DIMENSIONS AND SPECIFICATIONS IN THIS CATALOG ARE SUBJECT TO CHANGE WITHOUT NOTICE rcr DEXTER AXLE DEXTER AXLE www dexteraxle com 2900 Industrial Parkway East Elkhart IN 46516 Fax 574 295 8666 Ph 574 295 7888 7 07 Dexter Axle 2007 LIT 002 00
28. with good industry practice and any specific Dexter Axle recommendations including those specified in Dexter Axle s publication Operation Maintenance Service Manual EXCLUSIONS These warranties do not extend to or do not cover defects caused by 1 The connecting of brake wiring to the trailer wiring or trailer wiring to the towing vehicle wiring 2 The attachment of the running gear to the frame 3 Hub imbalance or any damage caused thereby 4 Parts not supplied by Dexter Axle 5 Any damage whatever caused by or related to any alteration of the axle including welding supplemental brackets to the axle 6 Use of an axle on a unit other than the unit to which it was originally mounted 7 Normal wear and tear 8 Alignment 9 Improper installation 10 Unreasonable use including failure to provide reasonable and necessary maintenance as specified in Dexter Axle s publication Operation Maintenance Service Manual including required maintenance after Prolonged Storage 12 Improper wheel nut torque 13 Cosmetic finish or corrosion LIMITATIONS 1 In all cases Dexter Axle reserves the right to fully satisfy its obligations under the Limited Warranties by refunding the then current list price of the defective axle or if the axle has been discontinued of the most nearly comparable current product 29 Warranty 2 Dexter Axle reserves the right to furnish substitute or replacement component
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