INSTALLATION GUIDE RD99 FORD 9”, 35 SPLINE Part No. 210299Revision Date 07/06/2006Copyright © 2003 by ARB Corpo
2 Removing the Existing Differential 8 2.5 Checking the Current Backlash Amount IMPORTANT: This step is a precautionary measure recommend
2 Removing the Existing Differential 9 2.6 Removing the Differential Carrier Remove both adjuster nut locking tabs. Loosen both bearing
3 Installing the Air Locker 10 3.1 Installing the Carrier Bearings If the tapered roller bearings from the original differential carrier
3 Installing the Air Locker 11 3.2 Re-Mounting the Ring Gear Remove the bolts that hold the ring gear in place. Using a plastic or co
3 Installing the Air Locker 12 3.3 Drilling and Tapping the Bulkhead Port An airline port must be drilled and tapped through the third me
3 Installing the Air Locker 13 3.4 Checking for Assembly Clearance IMPORTANT: Some third member castings will require modification for
3 Installing the Air Locker 14 HINT : Applying a machinists marking compound to the third member casting surfaces will show any points of
3 Installing the Air Locker 15 3.5 Checking the Backlash Set a depth indicator on one of the ring gear teeth (Fig.7.). While support
3 Installing the Air Locker 16 3.6 Assembling the Seal Housing Make sure the grooves and airway of the seal housing are clean and free fr
3 Installing the Air Locker 17 Install the spring clip by first hooking both ends of the clip into the small aligned cutouts of the seal hou
No liability is assumed for damages resulting in the use of the information contained herein. ARB Air Locker Air Operated Locking Differentia
3 Installing the Air Locker 18 3.7 Profiling the Seal Housing Tube Without using sharp, jagged tools such as pliers (usually your hands a
3 Installing the Air Locker 19 3.8 Setting Up the Bulkhead Fitting Trim the seal housing tube that is extended through the bulkhead port
3 Installing the Air Locker 20 NOTE : Excessive tightening of the center compression nut is not necessary to form a good seal around the
3 Installing the Air Locker 21 3.9 Bench Testing the Air Locker To test the Air Locker, when 620kPa [90 PSI] shop air is applied to the
3 Installing the Air Locker 22 3.10 Reinstalling the Differential and Axles Reinstall the third member to the differential housing acco
4 Installing the Air System 23 4.1 Mounting the Solenoid 4.1.1 Connection to an ARB Air Compressor (Fig.13.) Remove one of the 1/8”
4 Installing the Air System 24 4.1.2 Connection to an Alternate Air Source For ease of installation, quality of air supply, and a high le
4 Installing the Air System 25 4.2 Running and Securing the Air Line The path taken by the air line from your air source (i.e., compressor
4 Installing the Air System 26 To attach the air line to the push-in fitting of the solenoid; insert the line firmly into the fitting, pull
4 Installing the Air System 27 HINT : If the support tube is too difficult to insert, place the end of the air line into a cup of boiled w
Table of Contents: 1 1 Introduction 31.1 Pre-Installation Preparation 31.2 Tool-Kit Recommendations 41.3 Assembly Type Identification 5
5 Mounting & Connecting the Electrical System 28 5.1 Mounting the Actuator Switch(es) Air Locker actuator switch(es) can be easily pan
5 Mounting & Connecting the Electrical System 29 Figure 15. 5.2 Wiring the Actuator System 5.2.1 Connectio
5 Mounting & Connecting the Electrical System 30 UP Figure 16. Figure 17. SWITCHTERMINALIDENTIFICATION ARB
5 Mounting & Connecting the Electrical System 31 5.2.2 Connection to an Alternate Air Source When connecting the actuation switch to a
5 Mounting & Connecting the Electrical System 32 5.2.2.2 Dual Air Locker System If two Air Lockers are to be installed in the syste
6 Testing & Final Assembly 33 6.1 Leak Testing With the vehicle parked and the engine off, turn the compressor on and wait until the
6 Testing & Final Assembly 34 6.2 Testing the Air Locker Actuation To test that your air system, electrical system, and your Air Locke
6 Testing & Final Assembly 35 6.4 Post-Installation Check List Now that the Air Locker installation has been completed, ARB recommends
6 Testing & Final Assembly 36
7 Parts List 37 7.1 Exploded Assembly Diagram (See itemized parts list overleaf) Figure 20.
7 Parts List 38 7.2 Itemized Parts List (See exploded diagram figure 20.) AIR LOCKER MODEL No. : RD99 ITEM # QTY DESCRIPTION
1 Introduction 3 IMPORTANT : BEFORE ATTEMPTING TO DISMANTLE YOUR VEHICLE FOR THIS INSTALLATION, PLEASE READ THIS INSTALLATION GUIDE IN ITS E
1 Introduction 4 1.2 Tool-Kit Recommendations Below is a list of tools and supplies you may need to complete this installation. Requiremen
1 Introduction 5 1.3 Assembly Type Identification IMPORTANT: ARB’s RD99 Air Locker differential was not designed for use with the factor
2 Removing the Existing Differential 6 2.1 Vehicle Support Safely secure the vehicle on a hoist. We recommend supporting the vehicle on a
2 Removing the Existing Differential 7 2.3 Removing the Third Member Disconnect the drive shaft from the pinion flange. Remove both of
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