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Summary of Contents for ARB RD101
- Page 1 RD101 DANA 30, 27 SPLINE, 3.54 & DOWN AIR OPERATED LOCKING DIFFERENTIAL INSTALLATION GUIDE...
- Page 2 No liability is assumed for damages resulting in the use of the information contained herein. ARB Air Locker Air Operated Locking Differentials and Air Locker are trademarks of ARB Corporation Limited. Other product names used herein are for identification purposes only and may be trademarks of their respective owners.
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Page 3: Table Of Contents
Table of Contents: 1 Introduction 1.1 Pre-Installation Preparation 1.2 Tool-Kit Recommendations 1.3 Assembly Type Identification 2 Removing the Existing Differential 2.1 Vehicle Support 2.2 Differential Fluid Drain 2.3 Disconnecting the Axles 2.4 Marking the Bearing Caps 2.5 Checking the Current Backlash Amount 2.6 Removing the Differential Center 3 Installing the Air Locker 3.1 Insuring Adequate Oil Drainage... -
Page 5: Introduction
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. -
Page 6: Tool-Kit Recommendations
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. -
Page 7: Assembly Type Identification
1 Introduction Assembly Type Identification IMPORTANT: Sections 2 and 3 of this installation guide have been written to accommodate two different Dana 30 applications: the Independent Front Suspension (IFS) type with an aluminum housing (Refer to Fig.1.) the live axle Salisbury type with a cast iron housing. (Refer to Fig.2.) To eliminate confusion, you should identify which figure your vehicle matches with. -
Page 8: Removing The Existing Differential
2 Removing the Existing Differential 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. -
Page 9: Disconnecting The Axles
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. -
Page 10: Marking The Bearing Caps
2 Removing the Existing Differential 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 is ‘RIGHT’, which way is ‘UP’ and which way is ‘DOWN’. (Fig.3.) HINT : Many installers choose to make one punch mark on the left hand side of the left hand bearing cap and one... -
Page 11: Checking The Current Backlash Amount
2 Removing the Existing Differential 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. -
Page 12: Removing The Differential Center
2 Removing the Existing Differential Removing the Differential Center Cast Aluminum Housings 2.6.1 IMPORTANT: YOU MUST NOT SPREAD THE HOUSING ON ALUMINUM IFS ASSEMBLIES. IFS models like the Jeep Liberty (KJ) were made with an aluminum differential housing (See Figure 1.) and therefore must not be spread like a cast iron housing. - Page 13 2 Removing the Existing Differential HINT : Be sure not to mix up the left and right hand bearing cups. Later it will be necessary to know which cup came from which side. Once the housing has been adequately spread, the differential may be removed by pulling forward on the differential carrier.
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Page 14: Installing The Air Locker
3 Installing the Air Locker Insuring Adequate Oil Drainage IMPORTANT: Some Salisbury axles were manufactured with poor oil drainage between the axle tubes and the differential housing. This can often result in one of the axle tubes filling up with differential oil while running. -
Page 15: Installing The Carrier Bearings
3 Installing the Air Locker NOTE : Make sure any grinding dust, filings or drill chips left behind by cutting the drainage slots is completely cleaned out of the housing. Check that the axle air vents are clear and working correctly. Installing the Carrier Bearings ... -
Page 16: Approximate Backlash Shimming
3 Installing the Air Locker Approximate Backlash Shimming In order to reproduce a similar pre-load and ring and pinion backlash in your Air Locker to that of your original differential, measurements need to be taken so that a shim thickness can be calculated. ... - Page 17 3 Installing the Air Locker Assemble the new bearing cup and ARB master shim (supplied with your Air Locker kit) onto the right-hand side of the Air Locker (as shown in Fig. 9.) and measure the total distance ‘C’.
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Page 18: Mounting The Ring Gear
Select shims from the shim kit supplied with your Air Locker to make the thickness ‘B’ as determined above. Place this shim pack between the ARB master shim and the bearing cup. Re-measure the new distance ‘C’ from the Air Locker (now including the shim pack ‘B’) to make sure that it matches ‘A’... -
Page 19: Drilling And Tapping The Bulkhead Port
3 Installing the Air Locker Drilling and Tapping the Bulkhead Port An airline port must be drilled and tapped through the differential housing to mount the bulkhead fitting into. NOTE : Higher ratio gearing uses deeper (thicker) ring gears with teeth that extend much further. Make sure the intended hole location is far enough away from the ring gear teeth that the air line will not be at risk of contact with the current or future ring gears. - Page 20 3 Installing the Air Locker Port Location on the Live Axle Housing 3.5.2 Mark a spot on the top of the outside shell of the differential housing that will be clear of the ring gear position once the seal housing tube has been installed.
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Page 21: Assembling The Seal Housing
Assemble the bearing cup onto the left-hand side of the Air Locker. Assemble one of the two ARB master shims (included with the Air Locker shim kit) onto the stepped face of the seal housing with the rounded edge of the shim facing out. -
Page 22: Pre-Load Shimming
3 Installing the Air Locker Pre-Load Shimming In order to pre-load the tapered roller bearings in your Air Locker, measurements need to be taken so that a value can be calculated for the shim thickness ‘D’ in Figure 13. Pre-Loading an Aluminum Housing 3.7.1 ... - Page 23 3 Installing the Air Locker Figure 15. 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 ‘D’ in Figure 13. PRE-LOAD + END FLOAT = SHIM PACK ...
- Page 24 3 Installing the Air Locker Figure 16. Tap the factory shim into place between the seal housing and the aluminum housing with the notch lined up with the notch in the seal housing and the notch in the aluminum differential housing. (Fig.17.) Figure 17.
- Page 25 OE master shim. Insert and hold the Air Locker into the differential housing. Insert the remaining ARB master shim from the Air Locker shim kit between the right-hand bearing cup and the bearing seat of the axle housing with the rounded edge of the master shim facing away from the center.
- Page 26 NEVER machine the Air Locker. Remove the Air Locker from the axle housing. Install the shim pack ‘D’ between the ARB master shim and the seal housing as shown in Figure 13. Spread the differential housing again (Refer to Section 2.6).
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Page 27: Reinstalling The Bearing Caps
3 Installing the Air Locker Reinstalling the Bearing Caps IMPORTANT: The Air Locker master shim must be assembled between the stepped side of the seal housing and the bearing cup. NOT HAVING THE MASTER SHIM IN PLACE HERE WILL CAUSE BEARING FAILURE. ... -
Page 28: Checking The Backlash
3 Installing the Air Locker Checking the Backlash Set a depth indicator on one of the ring gear teeth as in Figure 21. 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). -
Page 29: Setting Up The Bulkhead Fitting
3 Installing the Air Locker Re-Shimming the Backlash 3.9.1 NOTE : This step is only necessary when adjusting for incorrect backlash. Remove the bearing caps. Remove the differential as before. NOTE : Never spread the housing on the aluminum models. ... - Page 30 3 Installing the Air Locker Figure 22. NOTE : Excessive tightening of the center compression nut is not necessary to form a good seal around the tube and may damage the O-ring or the threads of the compression nut. NOTE : Make sure the seal housing tube is all of the way into the center compression nut while you are tightening...
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Page 31: Profiling The Seal Housing Tube
3 Installing the Air Locker Profiling the Seal Housing Tube 3.11 Completely remove the differential spreader (if applicable). Without using sharp, jagged tools such as pliers (usually your hands are the best tool for this job), gently bend the seal housing tube so that it runs along the inside of the differential housing as shown in Figure 23. -
Page 32: Installing The Air System
Installing the Air System Mounting the Solenoid Connection to an ARB Air Compressor 4.1.1 (Fig.24.) 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. - Page 33 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: ...
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Page 34: Running & Securing The Air Line
Installing the Air System 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: ... -
Page 35: Connection To The Bulkhead Fitting
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. - Page 36 Installing the Air System HINT : If the tube is too difficult to push on, place the end of the air line into a cup of boiled water to soften the tubing. Screw on the outer compression nut and tighten, while supporting the center compression nut with a 3/8”...
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Page 37: Mounting & Connecting The Electrical System
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. -
Page 38: Wiring The Actuator System
Connection to an ARB Air Compressor 5.2.1 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. 27.) NOTE : Refer to your ARB Air Compressor Installation Guide... - Page 39 5 Mounting & Connecting the Electrical System ARB AIR COMPRESSOR WIRING LOOM Figure 27. SWITCH TERMINAL IDENTIFICATION Figure 28.
- Page 40 5 Mounting & Connecting the Electrical System Connection to an Alternate Air Source 5.2.2 When connecting the actuation switch to an alternate air source, the switch(es) should be wired according to figures 29. and 30., depending on whether one or two Air Lockers will be installed in the vehicle. Single Air Locker System 5.2.2.1 ...
- Page 41 5 Mounting & Connecting the Electrical System Dual Air Locker System 5.2.2.2 If two Air Lockers are to be installed in the system, ARB recommends that the switches and solenoids be wired according to figure 30. For safety reasons, this configuration allows SOLENOID 2 to be actuated only if SOLENOID 1 is already on.
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Page 42: Testing & Final Assembly
Testing & Final Assembly Leak Testing With the vehicle parked and the engine off, turn the compressor on and wait until the air system is fully charged. NOTE : 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. -
Page 43: Testing The Air Locker Actuation
The wheels should again rotate in opposite directions. Re-Sealing & Filling the Differential NOTE : Consult the ARB Air Locker Operating & 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. -
Page 44: Post-Installation Check List
Testing & Final Assembly 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. -
Page 45: Parts List
Parts List Exploded Assembly Diagram (See itemized parts list overleaf) Figure 31. -
Page 46: Itemized Parts List
180301 WARNING LABEL 210101 BUMPER STICKER 210102 OPERATION & SERVICE MANUAL 210200 INSTALLATION GUIDE 2102101 Not illustrated in exploded view. ** Available only as complete 6 gear set Part No. 2102101 Revision 7/10/2013 Copyright © 2013 by ARB Corporation Limited...
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