Installation - TM-10-3930-673-20-20399

TM 10-3930-673-20-2

(1)

Pump brake pedal

(TM 10-3930-673-10) to relieve accumulator

pressure.

With engine OFF (TM 10-3930-673-10), pump

brake pedal (TM 10-3930-673-10) until no

power assistance is felt through pedal. This will

require approximately 20 depressions of brake

TR00004

pedal.

(2)

Drain hydraulic oil from accumulator (1).

(a)

Place suitable container under

accumulator (1) to catch draining oil.

(b)

Disconnect hydraulic hose (2) from

adapter (3) on bottom of accumulator (1).

(c)

Allow accumulator (1) to drain

completely.

(3)

Remove three screws (4), lockwashers (5),

and accumulator (1) from cab (6). Discard

lockwashers.

(4)

Remove adapter (3) and preformed packing

(7) from accumulator (1). Discard preformed

packing.

b. Installation.

NOTE

Apply coating of clean hydraulic oil to all seals

as they are installed.

(1)

Install preformed packing (7) and adapter (3) on accumulator (1).

NOTE

Accumulator must be precharged prior to bleeding and installation on cab.

(2)

Precharge service brake hydraulic accumulator (1) with nitrogen gas. Refer to c. Test and Adjust

Service Brake Hydraulic Accumulator Precharge Pressure.

12-25