6 Testing & Final Assembly
6.3 Testing the Air Locker Actuation
To test that your air system, electrical system, and your Air Locker
differential is functioning correctly:
Support the vehicle such that the wheels are free to rotate (e.g., on
axle stands, a chassis hoist, etc.)
Leave the parking brake off, the transmission in neutral, and the Air
Locker switch ‘OFF’.
Turn the ignition to the ‘ON’ position (leaving the motor off). The
large illuminating symbol on the Air Locker switch cover should be
‘OFF’.
Turn the compressor (or alternate air source) on to charge the air
supply up to its maximum pressure.
While supporting the drive shaft flange, rotate one wheel by hand.
The wheel should rotate freely and the opposite wheel should be
turning in the opposite direction without any resistance or
mechanical noise from within the differential.
Turn the Air Locker switch to the ‘ON’ position. The illuminated
symbol on the switch cover should light up.
Rotate the same wheel again.
Both wheels should rotate together.
Turn the switch off again.
Rotate the same wheel.
The wheels should again rotate in opposite directions.
6.4 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.
Refill the differential until level with the filler hole.
Rotate the differential center 2 full turns.
Check the oil level and add oil if necessary.
Replace filler plug (apply thread sealant to filler plug before
inserting if it is a threaded type plug).
Wipe differential housing clean of any oil or grease which may
collect dirt or other abrasive particles.
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