Remove dust cap and release bolt from side of the center section. Re-attach the washer and nut to the bolt.
Then, you must SECURE the brake chamber on a table and apply between 100-120 psi to the parking side inlet port marked PARKING / 12. Maintain this pressure throughout this caging procedure.
Once properly seated, screw the nut and washer up to the housing, by hand at first while sure the T-end remains seated inside the spring plate groove.
With a hand wrench, torque the release bolt nut to ±20 ft-lbs. NEVER use an impact wrench as you will likely damage the unit and/or possibly cause the main spring to release, potentially causing bodily harm.
The RELEASE BOLT is now holding the parking spring in the collapsed position so you can SLOWLY RELEASE the air pressure from the unit.
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