ARB RD84 - Manual (Page 18)

3 Installing the Air Locker
16
c Create a shim pack to match ‘D’.
To achieve this desired shim thickness you can:
•
Use the shim from the other side of the differential if it is closer to
the desired thickness (only 1 original shim is required to be reused).
•
Machine down the original shim thickness.
•
Add shims between the original shim and the bearing cup.
•
Add shims between the bearing journal shoulder of the Air Locker
and the bearing cone.
•
Purchase new factory original shims at the desired thickness.
•
Use a universal shim kit available from most drive train specialists.
NOTE : NEVER machine the Air Locker.
3.4 Mounting the Ring Gear
c Apply a thin film of high pressure grease to the ring gear shoulder
of the Air Locker to prevent seizing.
c 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 between the ring gear and the Air
Locker flange.
HINT : Stoning the ring gear mounting face before
installation will remove any high spots around the
threads.
c Heat the ring gear to between 80 and 100
°
C [175 - 212
°
F] in hot
water or in an oven to slightly expand the gear and facilitate
assembly.
NOTE : NEVER HEAT GEARS WITH A FLAME! This could
damage the hardened surface of the gear and result
in premature wear or failure.
c Dry the gear and bolt holes with compressed air (if wet).
c Install the ring gear onto the Air Locker by aligning the bolt holes
and then gently tapping it around in a circle with a soft mallet.
Avoid using the bolts to pull down the ring gear as this puts excess
strain on the bolts and the differential flange.
c Apply a thread locking compound to the thread of each ring gear
bolt before inserting it. Do not apply threading compound directly
into the threaded hole as this could prevent the bolt from reaching
its full depth.
c Tighten the ring gear bolts in a star pattern with a torque wrench
according to your vehicle manufacturer’s specified torque.