INSTALLATION GUIDE RD121 TOYOYA 8” IFS,53mm BRNG Part No. 2102121Revision 20/09/05Copyright © 2005 by ARB Corpor
3 Installing the Air Locker 8 3.1 Approximate Backlash Shimming In order to reproduce a similar preload and ring and pinion backlash in your
3 Installing the Air Locker 9 c Using a caliper or similarly accurate measurement method (i.e., able to take accurate measurements within 0.04
3 Installing the Air Locker 10 3.2 Calculation & Selection of Backlash Shims Ideally, the measurement you recorded as ‘C’ from the Air L
3 Installing the Air Locker 11 3.3 Mounting the Ring Gear c Apply a thin film of high pressure grease to the ring gear shoulder of the Air L
3 Installing the Air Locker 12 3.4 Installing the Carrier Bearings c Apply a thin film of high pressure grease to both bearing journals of t
3 Installing the Air Locker 13 3.5 Preload Shim Measurement In order to preload the tapered roller bearings in your Air Locker, measurements
3 Installing the Air Locker 14 c Assemble the shim pack onto the seal housing flange on the same side as the seal housing tube’s solder joint.
3 Installing the Air Locker 15 3.6 Calculation & Selection of Preload Shims c Consult your vehicle manufacturer’s service manual to deter
3 Installing the Air Locker 16 Figure 7. Figure 8. NOTE : To best determine the correct vertical positio
3 Installing the Air Locker 17 Figure 9. c Cover the bearing seat area with a rag to protect the inside of the clamshell from met
No liability is assumed for damages resulting in the use of the information contained herein. ARB AIR LOCKER Locking Differentials and AIR LOCKER ar
3 Installing the Air Locker 18 c Make sure the seal housing tube and the grooves of the seal housing are clean and free from any contaminants (
3 Installing the Air Locker 19 3.9 Installing the Bulkhead Fitting c To obtain an oil tight seal, apply a thread sealant to the threads of t
3 Installing the Air Locker 20 NOTE : Excessive tightening of the center compression nut is not necessary to form a good seal around the tub
3 Installing the Air Locker 21 3.12 Checking the Backlash c Refer to your vehicle manufacturer’s service manual for the specified maximum
3 Installing the Air Locker 22 3.12.1 Re-Shimming the Backlash NOTE : This step is only necessary when adjusting for incorrect backlash.
3 Installing the Air Locker 23 3.13 Bench Testing the Air Locker c To bench test the Air Locker; when 620kPa [90 PSI] shop air is applied to
3 Installing the Air Locker 24 3.14 Reinstalling the Differential Assembly c Reassemble the differential assembly according to your vehicl
4 Installing the Air System 25 4.1 Mounting the Solenoid 4.1.1 Connection to an ARB Air Compressor (Fig.15.) c Remove one of the 1/8”
4 Installing the Air System 26 4.1.2 Connection to an Alternate Air Source For ease of installation, quality of air supply, and a high leve
4 Installing the Air System 27 4.2 Running and Securing the Air Line The path taken by the air line from your air source (i.e., compressor)
Table of Contents: 1 1 Introduction 3 1.1 Pre-Installation Preparation 3 1.2 Tool-Kit Recommendations 4 2 Removing the Existing Diff
4 Installing the Air System 28 4.3 Connection to the Bulkhead Fitting c Trim the air line to length using a sharp knife. c Insert the suppor
5 Mounting & Connecting the Electrical System 29 5.1 Mounting the Actuator Switch(es) Air Locker actuator switch(es) can be easily pane
5 Mounting & Connecting the Electrical System 30 5.2 Wiring the Actuator System 5.2.1 Connection to an ARB Air Compressor When wir
5 Mounting & Connecting the Electrical System 31 Figure 20. 5.2.2 Connection to an Alternate Air Source When connecting th
5 Mounting & Connecting the Electrical System 32 5.2.2.2 Dual Air Locker System c If two Air Lockers are to be installed in the syste
6 Testing & Final Assembly 33 6.1 Leak Testing c With the vehicle parked and the engine off, turn the compressor on and wait until the a
6 Testing & Final Assembly 34 c Turn the Air Locker switch to the ‘ON’ position. The illuminated symbol on the switch cover should light up
6 Testing & Final Assembly 35 6.4 Post-Installation Check List Now that the Air Locker installation has been completed, ARB recommends t
6 Testing & Final Assembly 36
7 Parts List 37 7.1 Exploded Assembly Diagram (see itemized parts list overleaf) Figure 23.
7 Parts List 38 7.2 Itemized Parts List (see exploded diagram Fig. 23.) AIR LOCKER MODEL No. : RD121 ITEM # QTY DESCRIPTION P
2 Removing the Existing Differential 3 IMPORTANT : BEFORE ATTEMPTING TO DISMANTLE YOUR VEHICLE FOR THIS INSTALLATION, PLEASE READ THIS INSTALL
2 Removing the Existing Differential 4 1.2 Tool-Kit Recommendations Below is a list of tools and supplies you may need to complete this ins
2 Removing the Existing Differential 5 2.1 Vehicle Support c Safely secure the vehicle on a hoist. We recommend supporting the vehicle on a
2 Removing the Existing Differential 6 2.4 Checking the Current Backlash Amount IMPORTANT: This step is a precautionary measure recomm
2 Removing the Existing Differential 7 2.5 Removing the Differential Center c Remove the floating shaft (or ADD unit if present) from the si
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