3 installing the air locker, Reverse the adjuster nut (counterclockwise) ¼ turn – ARB RD99 User Manual
Page 16

3 Installing the Air Locker
14
HINT :
Applying a machinists marking compound to the third 
member casting surfaces will show any points of 
contact after the Air Locker has been removed.
Once the required clearance has been achieved, remove the Air
Locker and the pinion shaft assembly and thoroughly clean the third 
member of any grinding dust or other foreign particles. 
 Reinstall the Air Locker into the third member. 
 Install the bearing caps oriented as they were marked before they 
were removed, and finger tighten the bearing cap bolts. It is not 
necessary to torque them down at this time.
Insert and lightly hand tighten the adjuster nut supplied with the Air
Locker kit into the flange side bearing cap.
NOTE :
You should feel no backlash between the ring and 
pinion gears once the adjuster nut tightens.
Reverse the adjuster nut (counterclockwise) ¼ turn.
Insert one of the original adjuster nuts into the bearing cap on the
opposite side and hand tighten using the appropriate adjuster nut 
wrench.
NOTE :
You should now feel some backlash between the 
ring and pinion gears. If not, there might be a 
clearance problem which is binding the carrier. Re-
check the clearance.
