ARB® Air Locker™ Locking Differential, Rear Dana 60
Contents
1. Drill through the housing square to the outside surface using an 11 2mm 7 16 drill Fig 7 Tap the hole from the outside using a 4 NPT tapered pipe thread tap Remove any sharp edges from the hole that may chip off and fall into the housing Very carefully remove rags and inspect with a service light inside the housing to insure no metal filings are left behind ARB 4 Installing the Air Locker 4 4 Assembling the Differential Carrier Relieve all tension on the housing spreader Place the bearing cup over the bearing cone Figure 8 O Oo O Ga z TD m 32Vd WIHS WIHS 44LSVW ONISNOH 1V3S Slide the seal housing into place against the bearing cup stepped side out The grooves in the bearing journal under the seal housing will house the O rings in the final assembly but they will not be installed now to avoid damage to the O rings Install the supplied master shim onto the seal housing NOTE The shim pack cannot be installed at this time as the required thickness shown as E in Figure 8 has yet to be determined ARB 4 Installing the Air Locker Hold the bearing cup in place on the ring gear side Holding the master shim and tapered roller bearing cup in place at each end insert and hold the Air Locker into the differential housing with the seal housing tube pointing straight out of the housing Install one bearing cap on the r2. 4 Installing the Air Locker Set a depth indicator on one of the ring gear teeth as in figure 9 While supporting the pinion gear by holding the drive shaft rotate the differential in both directions while observing the maximum variation in depth from the indicator i e the highest value minus the lowest value Make sure backlash is less than 0 5mm NOTE This backlash value is for the tube position only and will not be used for final assembly 4 5 1 Re Shimming the Backlash NOTE This step is only necessary when adjusting for incorrect backlash Reapply the spreader to the differential housing Remove the bearing cap Remove the differential To increase the amount of backlash reduce the shim thickness D Fig 4 and increase the shim thickness E Fig 8 by the same amount Reverse this step to decrease the backlash Remount the differential as before Release spreader tension Re check backlash ARB 4 Installing the Air Locker 4 6 Marking the Bearing Cap for Tube Clearance With the Air Locker in place and less than 0 5mm of backlash an accurate measurement for the seal housing tube clearance can be made NOTE Take time and double check when taking your measurements as bearing caps are custom fitted to the axle housing and cannot be replaced With the seal housing tube pointing straight out measure the distance from a fixed position insid
3. 4 Installing the Air Locker 4 7 Modifying the Bearing Cap 4 7 1 Drilling the Bearing Cap Hold the bearing cap steady for drilling in a soft jawed vise clamp NOTE Do not apply too much clamping pressure with the vise The bearing cap may be damaged Using a pedestal drill drill a 6 35mm 14 hole through the bearing cap where the seal housing tube hole has been marked Fig 12 Figure 12 _ Remove the bearing cap from the vise turn it upside down and re clamp it in the vise The drilled hole must be chamfered approximately 3mm 1 8 to remove any sharp edges that may chip off and fall into the housing Fig 13 Installing the Air Locker Figure 13 4 7 2 Notching the Bearing Cap _ Use a soft jawed vise clamp to hold the bearing cap steady Using a 6 35mm 4 rat tailed file File out a notch in the bearing cap from the closest edge until an adequate notch has been cut around the position of the punch mark Fig 14 File a chamfer around the inside edge of the notch to remove any sharp edges from the notch that may chip off and fall into the housing ARB 4 Installing the Air Locker 4 8 Air Locker Final Assembly Remove the seal housing shim pack and master shim and clean all parts of the differential assembly It is very important to make sure the seal housing grooves are free from any contaminants eg water dirt metal fillings etc
4. LOCKING DIFFERENTIALS INSTALLATION GUIDE DANA 60 32 SPLINE 4 56 amp UP Part No 210295 Hevision Date 11 11 03 Copyright 2001 by ARB Corporation Limited 1 introduction IMPORTANT BEFORE ATTEMPTING TO DISMANTLE YOUR VEHICLE FOR THIS INSTALLATION PLEASE READ THIS INSTALLATION GUIDE IN ITS ENTIRETY AS WELL AS ALL APPLICABLE SECTIONS OF YOUR VEHICLE MANUFACTURER S SERVICE MANUAL 1 1 Pre Installation Preparation This booklet is to be used in conjunction with your vehicle manufacturer s service manual ARB endeavors to account for every possible variation in vehicle model when publishing its installation guides and guides are updated regularly as new model information becomes available however the rapid and globally varied release of some vehicles makes it difficult to insure that your vehicle model has been accurately accounted for In the case of any technical discrepancies between this guide and your service manual we strongly advise that you adhere to the specifications and techniques as documented in your service manual Although your ARB Air Locker comes complete with all the step by step instructions you will need to supplement your vehicle manufacturer s service manual and install your new differential ARB recommends that you have your Air Locker installed by a trained professional Many ARB distributors around the world have been fully instructed in Air Locker installations by ARB and have gained a w
5. dirt or other abrasive particles ARB m JJ 7 Testing amp Final Assembly 7 4 Post Installation Check List Now that the Air Locker installation has been completed ARB recommends that you take the time to complete the following check list just to insure that you haven t missed any of the vital steps The air system has been leak tested Thread locking compound was used on the ring gear bolts _ All torque settings comply with the vehicle manufacturer s specs and were set with an accurate torque wrench Differential fluid complies with ARB recommendations and has been filled to the correct level All air lines and wiring have been securely cable tied to resist snagging Switch es have been securely mounted within operator reach yet well away from danger of accidental engagement Switch es function properly and illuminate to indicate that Air Locker s are engaged All operators who are to use the Air Locker have read and fully understand the ARB Air Locker Operating amp Service Manual The Air Locker Warning Sticker has been located within close proximity of the actuator switch es INSTALLATION PERFORMED BY DATE OF INSTALLATION ODOMETER READING ARB AIR LOCKER SERIAL No ARB 8 Parts List 8 1 Exploded Assembly Diagram See itemized parts list overleaf RD95 DANA 60 32 SPLINE 4 56 amp UP 8 Parts List 8 2 Itemized Parts List See explod
6. is RIGHT which way is UP and which way is DOWN Fig 1 HINT Many installers choose to make one punch mark on the left hand side of the left hand bearing cap and one similar punch mark on the housing at close proximity to the cap mark The right hand side is then designated with two punch marks on the right hand side of the cap and two similar punch marks on the housing 2 Removing the Existing Differential 2 5 Checking the Current Backlash Amount IMPORTANT This step is a precautionary measure recommended by ARB due to the fact that some after market ring and pinion sets have been manufactured to run with different backlash settings than those specified by your vehicle manufacturer Although ARB must recommend you set backlash according to your service manual guidelines we also advise that you compare the backlash measurements taken here to the recommended backlash settings in your vehicle service manual Measurements found to be outside of your service manual recommendations may indicate the need to deviate from those settings in order to achieve quiet running with a good contact mark Refer to your vehicle service manual or your local authorized ARB installer for more information _ Set a depth indicator on one of the ring gear teeth as in figure 2 While supporting the pinion gear by holding the drive shaft rotate the differential in both directions while observing the maxi
7. is not necessary to form a good seal around the tube and may damage the O ring the seal housing tube or the threads of the compression nut ARB 4 Installing the Air Locker NOTE Make sure the seal housing tube is all of the way into the center compression nut while you are tightening it Again check that no part of the seal housing tube comes in contact with the moving differential components Less than 8mm 5 16 should be considered too little clearance Gently bend the tube away from moving parts if necessary 4 42 Reinstalling the Axles Remove the differential housing spreader Insert both axles fully into the housing and gently tap them inward NOTE Be careful not to damage the axle oil seals with the spline of the axle Reassemble the brakes differential and wheels to the vehicle according to your vehicle s service manual ARB gt o Installing the Air System 5 1 Mounting the Solenoid 5 1 1 Connection to an ARB Air Compressor Fig 18 Remove one of the 1 8 BSP plugs from its port in the compressor tank Apply Teflon paste to the nipple 1 8 X 1 8 BSP and insert it into the port and tighten Apply Teflon paste to the free end of the nipple Assemble the inlet port side of the solenoid stamped with a 1 onto the nipple and tighten The solenoid should be rotated into a position that does not obstruct any other ports on the compressor tank T
8. of the gear and result in premature wear or failure Dry the ring gear with compressed air if wet paying particular attention to the threaded holes _ Install the ring gear onto the Air Locker by aligning the holes in the flange with the tapped holes in the ring gear then gently tapping it around in a circle with a plastic or copper hammer NOTE Avoid using the bolts to pull down the ring gear as this puts excess strain on the bolts and the differential flange Apply a thread locking compound to the thread of each ring gear bolt before inserting it NOTE Do not apply threading compound directly into the threaded hole as this could prevent the bolt from reaching its full depth Tighten the ring gear bolts in a star pattern with a torque wrench according to your vehicle manufacturer s specified torque ARB m JJ 4 Installing the Air Locker 4 3 Drilling and Tapping the Bulkhead Port A port must be drilled and tapped through the differential housing to allow the seal housing tube through the housing to connect with the air line from the air compressor Mark a spot for the bulkhead port on the right hand seal housing side toward the top of the differential housing that is in an area that will be well clear of the ring gear the differential and any other obstructions that may snag the seal housing tube Cover the drive pinion and axle tube areas with a rag to protect them from metal filings
9. DE 2102065 Not illustrated in exploded view ARB gt ARB PERFORMANCE CLUTCHES TRANSMISSION AND DRIVETRAIN
10. JJ 7 Testing amp Final Assembly Turn the ignition to the ON position leaving the motor off The large illuminating symbol on the Air Locker switch cover should be OFF Turn the compressor or alternate air source on to charge the air supply up to its maximum pressure Rotate one wheel by hand The wheel should rotate freely and the opposite wheel should be turning in the opposite direction without any resistance or mechanical noise from within the differential Turn the Air Locker switch to the ON position The illuminated symbol on the switch cover should light up Rotate the same wheel again Both wheels should rotate together Turn the switch off again Rotate the same wheel The wheels should again rotate in opposite directions 7 3 Re Sealing amp Filling the Differential NOTE Consult the ARB Air Locker Operating amp Service Manual for recommendations on differential lubricant specifications Replace the differential cover using gasket sealant or a new standard differential cover gasket for your make of vehicle Refill the differential until level with the filler hole Rotate the differential center 2 full turns Check the oil level and add oil if necessary Replace filler plug apply thread sealant to filler plug before inserting if it is a threaded type plug Wipe differential housing clean of any oil or grease which may collect
11. Lubricate the O rings with oil prior to assembly then stretch them over the bearing journal and release them into the grooves NOTE Do not roll the O rings onto the seal housing as this will damage them Place the bearing cups onto their respective bearing cones _ Install the seal housing over the O rings by gently applying a downward twisting motion This will allow the O rings to gently engage Assemble the shim pack and master shim Point the seal housing tube straight out of the housing hold the shims and tapered roller bearing cups in place and insert and hold the Air Locker into the differential housing _ Install the bearing cap on the ring gear side Check to see if the bearing cap on the seal housing side fits over the tube without fouling NOTE Do not forget to check the bearing caps are turned the correct way around Install all bearing cap bolts and torque to manufacturer s specs 4 9 Final Backlash Checking Relieve all tension on the housing spreader Tighten all bearing cap bolts with a torque wrench to the torque specified in your vehicle manufacturer s service manual Seta depth indicator on one of the ring gear teeth as in Figure 15 While supporting the pinion gear by holding the drive shaft rotate the differential in both directions while observing the maximum variation in depth from the indicator i e the highest value minus the lowest value This
12. TRE PF K JA W m 1 EN Au Oka m a RAY Ga as v I wx gt ES L h 7 M433 Ji A Et c Figure ONES DE La aL 5 Eria siio A Qe V 43 aS v ye D ACE D y a rw g 4 1 eke A o NE T Ml I Aa gt 6 2 Wiring the Actuator System 6 2 1 Connection to an ARB Air Compressor When wiring the Air Locker actuator switch es and solenoid s to an ARB Air Compressor all connections can easily be set up directly from the supplied wiring loom Fig 21 NOTE Refer to your ARB Air Compressor Installation Guide for details on configuring your installation 6 Mounting amp Connecting the Electrical System ARB AIR COMPRESSOR WIRING LOOM PRESSURE LIMIT SWITCH SOLENOID 1 SOLENOID 2 ISOLATION SWITCH ILLUMINATION COMPRESSOR MOTOR RED YEL TO IGNITION BLU WHT TO DASH PLUG IN FITTING SF PLUG IN StI PLUG IN 9 s FITTING LI FITTING SWITCH 1 SWITCH 2 SWITCH TERMINAL IDENTIFICATION 6 Mounting amp Connecting the Electrical System 6 2 2 Connection to an Alternate Air Source When connecting the actuation switch to an alternate air source the switch es should be wired according to figures 23 and 24 depending on whether one or two Air Lockers will be installed in the vehicle 6 2 2 1 Single Air Locker System If only one Air Locker is to be installed in the system the switch and solenoid should be wired according to f
13. e the differential housing to the center of the seal housing tube Fig 10 MEN AM m u Record your findings and recheck for accuracy Remove the bearing cap from the ring gear side of the differential Remove the Air Locker from the differential housing Install the seal housing side bearing cap and hand tighten the bearing cap bolts NOTE ltis very important to make sure the punch marks made on the differential housing while removing the differential are matched to the punch marks on the bearing cap The bearing cap must be replaced exactly as it was removed Refer to section 2 4 ARB 4 Installing the Air Locker Measure to the bearing cap from exactly the same position on the differential housing that you took the previous measurements from Fig 11 Mark the tube position with a center punch where the clearance is to be made for the seal housing tube Remove the bearing cap from the differential housing Measure the distance from the center punch mark made on the bearing cap to the closest edge of the bearing cap If the center punch mark is greater than 6 35mm 4 from the closest edge of the bearing cap it is recommended that a small hole be drilled through the bearing cap Section 4 7 1 If less than 6 35mm 4 from the edge it is recommended that a notch is filed into the side of the bearing cap to avoid break through while drilling Section 4 7 2
14. ealth of experience and skill from years of performing similar installations Once you begin this installation your vehicle will be immobile until all steps of the installation are complete Make sure your Air Locker kit is the correct model for your vehicle and that it contains all of the parts listed on back cover of this booklet Also be sure you have appropriately equipped yourself with all the necessary tools parts and materials to complete this installation see section 1 2 Tool Kit Recommendations and that you have allowed for an appropriate amount of vehicle down time HINT Place a V mark inside each of the symbols as you complete each step It is very important NOT to miss any of the steps ARB DD 1 introduction 1 2 Tool Kit Recommendations Below is a list of tools and supplies you may need to complete this installation Requirements for your vehicle may vary Please consult your vehicle service manual for additional recommendations 1 2 1 Tools Standard automotive sizes metric and or imperial of sockets wrenches Alan keys and drills JAdial indicator or other suitable measuring tool for checking ring amp pinion backlash _ A standard automotive feeler gauge _ Automotive brake tubing cutters to cut the steel tubing _ A razor knife to cut the nylon tubing _ A differential housing spreader to facilitate removal of the carrier _ A torque wrench See vehicle service man
15. ed diagram figure 25 AIR LOCKER MODEL No RD95 01 1 FLANGECAP 021500 02 1 CLUTCHGEAR 050400 03 1 DIFFERENTIALCASE 01701 04 4 JPISTONSPRING 150100 05 3 CROSSSHAFTRETAININGPIN 120301 06 1 LONGCROSSSHAFT 060703 07 2 SHORTCROSSSHAFT 060802 08 1 PISTON Polyamide 040500 09 1 BONDDSEAL 160700 10 1 CYLINDERCAP 030803 11 2 SEALHOUSINGO RING 160207 12 8 CYLINDER CAP RETAINING BOLT 200200 13 8 TABWASHER 8mm 150400 14 1 TAPERED ROLLER BEARING 160107 15 1 SEALHOUSING 080700 16 1 SHMKT SHKO 17 1 jSPLINEDSIDEGEAR 130806 18 4 PINIONTHRUSTWASHER 151104 19 4 jJPINONGEAR 140400 20 1 SPIDERBLOCK 070400 21 SIDE GEAR O 130700 22 2 SIDEGEARTHRUSTWASHER 151000 1 BULKHEAD KIT O RING TYPE 3 5 bmm 170105 1 PUSH N FITTING 5mm R15 1 8 170201 1 AIRLINE SmmDIAX6mLONG 170301 1 NIPPLE 1 8 BSP MALE TO MALE 1 SOLENOIDVALVE 180103 1 JACTUATORSWTCH 180209 1 SWITCHCOVER FRON 180210 1 SWITCHCOVER REAR 18021 10 CABLTIE 1803000 1 jWARNNGLABEL 210101 1 jBUMPERSTICKFER 210102 1 OPERATING 8 SERVICE MANUAL 210200 1 INSTALATIONGU
16. f the air line small end first Fig 19 Insert the outer compression nut over the air line _ Insert the 5mm 0 1977 ferrule over the end of the air line Leave approx 5mm of tubing between the ferrule and the end of the tube SUPPORT SPRING OUTER COMPRESSION NUT FERRULE 5 0mm 0 197 SUPPORT TUBE Insert the support tube all the way into the end of the air line ARB 5 Installing the Air System HINT Ifthe support tube is too difficult to insert place the end of the air line into a cup of boiled water to soften the tubing Insert the tube end all the way into the center compression nut Screw on the outer compression nut and tighten The ferrule and support tube are now permanently attached Assemble the support spring over the outside of the outer compression nut Secure any loose sections of tube with a cable tie ARB gt 6 Mounting amp Connecting the Electrical System 631 Mounting the Actuator Switch es Air Locker actuator switch es can be easily panel mounted inside the vehicle in a 21mm x 36 5mm 0 83 x 1 44 rectangular cutout NOTE Only attach the cover plate to the face of the switch once the switch has been mounted and wired correctly as the cover plates are designed to be difficult to remove For reasons of safety and for ease of operation the Air Locker actuator switch es should be mounted in a location pic
17. ff turn the compressor on and wait until the air system is fully charged With the Air Locker s disengaged the air source i e compressor should not have to recharge over time Intermittent recharging without Air Locker use usually indicates a leak at the solenoid fittings or at the compressor tank O ring seal Actuate the Air Lockers The compressor should not come on again for a period of at least 15min Air system recharging within that time period would indicate that a leak is present in the system If an alternate air source e g an air cylinder or a belt driven air pump is used instead of a compressor the air system will have to be leak tested with a pressure gauge and a shut off valve in series before the solenoid input If a leak is found to be present spray a soap and water mixture onto all air fittings in the system while the compressor is fully charged Bubbles should appear at any leak points Check that leaky fittings have been adequately tightened Disassemble clean threads and reapply thread sealant if leaking persists 7 2 Testing the Air Locker Actuation To test that your air system electrical system and your Air Locker differential is functioning correctly Support the vehicle such that the wheels are free to rotate e g on axle stands a chassis hoist etc _ Leave the parking brake off the transmission in neutral and the Air Locker switch OFF ARB m
18. he solenoid exhausts compressed air through the center of the black retaining cap when the Air Locker is disengaged Make sure this orifice cannot be obstructed Apply Teflon paste to the threads of the 5mm push in fitting and assemble it into the solenoid outlet port stamped 2 and tighten AIR LINE TO DIFFERENTIAL 5mm PUSH IN FITTING Air Compressor 7 5 Installing the Air System 5 1 2 Connection to an Alternate Air Source For ease of installation quality of air supply and a high level of dependability from your Air Locker s ARB strongly recommends use of a genuine ARB Air Compressor however the Air Locker air system can be operated on any alternate air source that meets each of the following guidelines Must supply a minimum of 85PSI 586kPa The supply must never exceed 105PSI 724kPa The Air source should have a tank capacity that enables it to actuate the Air Locker s in one charge so that no hesitation is experienced when locking one or two differentials HINT A good way to insure that you have the necessary capacity is to make sure you can engage disengage and then reengage your Air Locker s without the air source having to regenerate e g without the compressor turning on to refill the tank Must supply clean air free of rust dirt water or other foreign matter Must match the 1 8 BSP porting of the Air Locker solenoid Mount solenoid w
19. ial cover plate seal to prevent dirt from entering the differential Position a fluid drain reservoir under the differential and loosen all differential cover plate retaining bolts Gently pry the cover plate away from the differential housing to completely drain all differential fluid Once drained remove differential cover plate HINT This is a good time to check for metal particles in your oil and in the bottom of the housing which may indicate a worn bearing or differential component 2 3 Removing the Axles _ Remove the backing plate nuts from the axle housing Discard the nuts and replace at time of reassembly NOTE The nuts are designed to be tightened only once and must not be reused Remove each axle shaft by pulling outward on the axle It may need to be loosened with pry bars IMPORTANT Collision damage or heavy off road use of your vehicle in the past may have resulted in some degree of bending in the axle Any misalignment of the axle tubes may result in excessive wear and or failure of your differential and axle shafts ARB strongly recommends that you have your axle assembly inspected for concentricity and straightness before installing your Air Locker 2 Removing the Existing Differential 2 4 Marking the Bearing Caps Using a pointed center punch gently mark the bearing caps in a way that will enable you to know which cap is LEFT and which cap
20. igure 23 regardless of whether the Air Locker has been installed in the front or rear axle of the vehicle Attach the appropriate switch cover i e FRONT or REAR to the switch NOTE Refer to Figure 22 for the correct switch terminal identification and switch orientation SINGLE Air Locker SYSTEM SOLENOID 1 ILLUMINATION TO IGNITION OR ISOLATING SWITCH TO DASH GROUND SWITCH 1 6 Mounting 8 Connecting the Electrical System 6 2 2 2 Dual Air Locker System If two Air Lockers are to be installed in the system ARB recommends that the switches and solenoids be wired according to figure 24 For safety reasons this configuration allows SOLENOID 2 to be actuated only if SOLENOID 1 is already on Attach the REAR AIR LOCKER switch cover to SWITCH 1 and the FRONT AIR LOCKER switch cover to SWITCH 2 NOTE Refer to Figure 22 for the correct switch terminal identification and switch orientation _ Configure SOLENOID 1 as the air line leading to the rear axle Air Locker and SOLENOID 2 as the air line leading to the front axle Air Locker DUAL Air Locker SYSTEM ILLUMINATION TO IGNITION OR ISOLATING SWITCH GROUND SOLENOID 1 SOLENOID 2 i TO DASH SWITCH 1 EN PLUG IN 4 PLUG IN FITTING o I FITTING N D 2 L O 9 mM z i 6 A ARE 7 Testing amp Final Assembly 7 4 Leak Testing With the vehicle parked and the engine o
21. ing gear side The bearing cap on the seal housing side will need to be drilled or slotted as clearance for the seal housing tube Install the bearing cap bolts finger tight Push the Air Locker hard across to the ring gear side and measure the gap end float between the master shim and the housing with a feeler gauge Consult your vehicle manufacturer s service manual to determine the carrier bearing pre load amount specified for your vehicle Add the specified pre load amount to the measurement taken with the feeler gauge to determine a shim amount for E in Figure 8 PRE LOAD END FLOAT SHIM PACK Select suitable shims from the supplied shim kit to make up a shim pack of this thickness Remove the Air Locker and assemble the shim pack onto the seal housing spigot behind the master shim Figure 8 Spread the differential housing again Refer to section 2 6 NOTE If the carrier is too difficult to install with the added shim pack then the spreader tension may need to be increased Do not spread the housing more than 0 50mm 0 020 Reinstall the Air Locker as before i e with only one bearing cap Release all spreader tension 4 5 Approximating the Backlash for Tube Position If the backlash is not close enough to the specified amount the tube position cannot be accurately measured to modify the bearing cap for tube clearance This must be checked before hand ARB m JJ
22. ing gear side bearing journal and assemble the newly established shim pack onto the bearing journal Press the tapered roller bearing cone onto the bearing journal of the differential carrier until the bearing seats firmly against the shim pack NOTE Neverre use any bearings which are damaged or Worn Invert the Air Locker and apply a thin film of high pressure grease to the seal housing side bearing journal Press the bearing cone which was supplied with the Air Locker kit onto the bearing journal taking care not to damage the o ring grooves Figure 6 1 aza LEFT ee ae rf eomm NOTE Do not add any shims between the seal housing bearing and the bearing seat 4 Installing the Air Locker 4 2 Mounting the Ring Gear Apply a thin film of high pressure grease to the ring gear shoulder of the Air Locker to prevent seizing Thoroughly clean any thread locking compound or other foreign matter from the holes of the ring gear the threads of the ring gear bolts and the mating surfaces of the ring gear and the Air Locker flange NOTE Rubbing the ring gear mounting face with a flat oil stone before installation will remove any high spots around the threads Heat the ring gear to between 80 and 100 C 175 212 F in an oven or in hot water to slightly expand the gear and facilitate assembly NOTE NEVER HEAT GEARS WITH A FLAME This could damage the hardened surface
23. ithin close proximity of the air supply and secure it from the effects of vibration and shock Connect the air supply to the 1 8 BSP inlet port of the solenoid stamped 1 on the solenoid body using thread sealant IMPORTANT ARB cannot warrant your Air Locker s against damage caused as a result of using an alternate air supply If you have any doubts as to the suitability of your air system to use in an Air Locker system consult your ARB distributor ARB m JJ o Installing the Air System 5 2 Running and Securing the Air Line The path taken by the air line from your air source i e compressor to your Air Locker is unique to your vehicle and the position of your air source Plan ahead carefully when running the air line and always follow these guidelines Account for axle travel when running the line from the axle to a fixed point on the vehicle Leave enough slack in the air line to allow for maximum suspension travel in both directions Avoid leaving large lengths of air line hanging underneath the vehicle where they may get tangled on rocks sticks etc HINT Cable tying the air line to one of your flexible brake lines will account for axle travel and should help keep your line from getting snagged Run the air line all the way from the compressor to the differential before trimming either end of the line to length This will save complications that may arise if the air line has to be
24. ked to best suit the operator Make sure you have taken the following points into consideration Switch es MUST be mounted and should never be allowed to simply dangle from the wiring loom during vehicle use _ Switch es should be within easy reach of the driver Ideally any Air Locker switch should be able to be operated without physical effort or distraction to the driver Switch es should be mounted within the line of sight of the driver so that switch position ON or OFF can be visually determined by the rocker position and the illumination state The position of the switch es should best eliminate any possibility of accidental operation by the driver or one of the passengers Switch cutout position s must be located in an area with a minimum of 50mm 2 of clearance behind the face of the cutout Switch es should not be mounted where they will be exposed to water e g in the lower section of an inner door panel ARB recommends that you apply the Air Locker Warning Sticker ARB part 210101 within close visual proximity of the switch location If no adequate position can be found on existing dashboard panels a surface mounted bracket Fig 20 may be purchased from your ARB Air Locker distributor to suit 1 2 or 3 switches ARB 6 Mounting Connecting the Electrical System REAR COMPRESSOR vosk NE v a wT Axa 3 a a a Wal E s ast u r WX
25. mum variation in depth from the indicator i e the highest value minus the lowest value This value is referred to as the ring and pinion backlash Rotate the differential center 90 and measure again for accuracy Record the average of all measurements ARB 2 Removing the Existing Differential 2 6 Spreading the Differential Housing IMPORTANT Spreading the differential housing with a differential case spreader is a step which is critical to set up bearing pre load when a differential is installed Improper pre load will result in undue bearing wear increased stresses in the differential center increased running noise and ultimately ring and pinion gear damage Unbolt and remove the bearing caps from the differential housing HINT Be sure not to mix up the left and right hand bearing caps Later it will be necessary to know which cup came from which bearing and which shim came from which side Carefully spread the housing Fig 3 enough to remove the differential center Refer to your vehicle s service manual NOTE Do not spread the housing more than 0 50mm 0 0207 Once the housing has been adequately spread the differential may be removed by pulling forward on the differential carrier EFT E Fo r v gt x v l ee I Pe gt a py a c Figure 3 P NOTE Thedifferential center is heavy and quite difficult to handle when c
26. or the cover plate 4 11 Setting up the Bulkhead Fitting Trim the seal housing tube that is extended outside the differential housing to approximately 20 25mm 0 8 1 0 of extension using an automotive brake line tubing cutter NOTE Never use a hacksaw for trimming the steel tube as this will leave metal fillings in the air system _ Apply thread sealant to the threads of the bulkhead body Screw the bulkhead body into the tapped hole and tighten _ R 0 4 Installing the Air Locker Wipe the area clean of any excess thread sealant inside and outside of the housing From the outside of the housing assemble the small O ring over the top of the short length of seal housing tube protruding through the bulkhead fitting While holding the seal housing tube into the bulkhead fitting insert the small drilled end of the center compression nut over the extended tube as shown in the assembly diagram Fig 17 and screw it into the bulkhead body and lightly tighten Be sure to insert the correct end of the center compression nut into the bulkhead body The thread has been partially relieved on the bulkhead side of the center compression nut to visually identify its orientation Fig 17 CENTER 4 E COMPRESSION NUT J a BULKHEAD BODY O RING E B DIFFERENTIAL HOUSING SEAL HOUSING TUBE TO SEAL HOUSING Excessive tightening of the center compression nut
27. overed in oil Take care not to drop it ARB 3 Bench Measurement 3 1 Measurement for Pre Load Shimming When fitting an ARB Air Locker a replacement bearing and variable shim pack supplied are used on the right hand side opposite the ring gear in order to achieve the correct ring and pinion backlash and carrier bearing pre load once the Air Locker has been installed Because of this the original shims and bearing from this side will not be reused The original bearing type and shim type are used on the left hand ring gear side of the Air Locker however in order to reproduce a similar backlash and pre load to that of your existing differential measurements need to be taken so that the correct shim thickness can be determined for this side Secure the differential to a work bench Remove the bolts that hold the ring gear in place Using a plastic or copper hammer tap in a circle around the ring gear to separate it from the differential carrier Remove the original bearings and shims from the differential carrier using a bearing puller NOTE Keep the shims separated so that they can be identified as to which end of the differential they came from Using a caliper or similarly accurate measurement method I e able to take accurate measurements within 0 04mm 0 00 15 measure the distance from the bearing shoulder to the ring gear mounting face shown as A in Figure 4 and
28. record this measurement as A Measure the thickness of the shim pack removed from the ring gear side of the differential carrier shown as B in Figure 4 and record this measurement as B Measure the distance from the Air Locker bearing shoulder to the ring gear mounting face shown as C in Figure 5 and record this measurement as C ARB m JJ 3 Bench Measurement 3 Bench Measurement 3 2 Calculation amp Selection of Shims The thickness of the shim pack required for the Air Locker shown as D in Figure 5 can now be determined by substituting the measurements taken into the following equation A B C D HINT If your calculations are correct then the following equation will also be true A B C D ZERO To make a shim pack to match the measurement you calculated as D you can remove shims from the shim pack you measured as B add some shims from the shim pack you removed from the right hand side of the original differential to the shim pack you measured as B Supplement your original shims with shims purchased from your vehicle manufacturer z Use a universal shim kit available from most drive train specialists NOTE Never re use any shims which are damaged or worn 4 Installing the Air Locker 4 1 Installing the Carrier Bearings With the Air Locker well supported in an arbor press apply a thin film of high pressure grease to the r
29. removed Make sure the line does not contact sharp edges or abrasive surfaces that may damage the air line over time Do not run the air line around tight bends which may kink the air line and restrict or block the air flow Keep the air line well away from your vehicle s exhaust components Air lines will melt if subjected to extreme heat Do not run more air line than necessary Excess line volume created when coiling the left over hose using unusually large diameter hose etc will increase drain on the compressor tank resulting in the compressor running more often than needed Support the air line by tying it back with cable ties wherever possible At the solenoid end of the air line trim the line to length with a sharp knife To remove the air line from the push in fitting while holding the flange of the fitting out push the air line into the fitting as far as possible then press the flange inward then pull the air line free of the fitting ARB o Installing the Air System To attach the air line to the push in fitting of the solenoid insert the line firmly into the fitting pull outward on the flange of the fitting while holding the line as far into the fitting as possible and then gently pull outward on the air line to clamp the line in place 5 3 Connection to the Bulkhead Fitting Trim the air line to length using a sharp knife Insert the support spring over the end o
30. ual for required torque range _ A lubricant drain reservoir Suitable measuring tools to measure a differential for pre load and or backlash shimming See Section 3 Bench Measurement A 11 2mm 7 16 drill and 1 4 NPT tap for bulkhead fitting installation An automotive bearing puller 2 jawed is recommended or a differential carrier bearing puller _ A bearing press or arbor press 1 2 2 Supplies Thread lubricant sealant compound e g LOCTITE 567 Thread locking compound e g LOCTITE 272 Either a replacement gasket or gasket sealant for your differential cover _ A sufficient volume of differential oil to completely refill your housing see the ARB Air Locker Operating and Service Manual for recommended lubricants _ A soap and water mixture to test for air leaks Teflon paste _ A selection of differential bearing shims to set up pre load and backlash See section 3 Bench Measurement ARB 2 Removing the Existing Differential 2 1 Vehicle Support Safely secure the vehicle on a hoist We recommend supporting the vehicle on a chassis hoist to keep the differential area at a convenient working height and to leave the wheels and axles free to be rotated and removed Once supported off the ground release the parking brake and leave the vehicle in neutral Chock the wheels if necessary 2 2 Differential Fluid Drain Clean around the different
31. value is referred to as the ring and pinion backlash ARB DD 4 Installing the Air Locker Rotate the differential center 90 and measure again for accuracy Refer to your vehicle service manual for the specified maximum and minimum amounts of backlash If the backlash is not within the specifications then the differential will have to be removed and re shimmed 4 9 1 Re Shimming the Backlash NOTE This step is only necessary when adjusting for incorrect backlash Reapply the spreader to the differential housing Remove the bearing caps Remove the differential To increase the amount of backlash reduce the shim thickness D Fig 5 and increase the shim thickness E Fig 8 by the same amount Reverse this step to decrease the backlash Remount the differential as before Release spreader tension Check backlash again as before ARB 4 Installing the Air Locker 4 10 Profiling the Seal Housing Tube Without using sharp jagged tools such as pliers usually your hands are the best tool for this job bend the seal housing tube so that it closely follows the profile of the differential housing and protrudes through the bulkhead port in the differential housing Fig 16 BULKHEAD FITTING STEEL TUBE BEARING CAP VV 3 NZ S YOU IN SS _ Check that the contour of the tube will not interfere with the ring gear differential
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