TM-9-2320-260-20
TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
APRIL 1995
TM-9-2320-260-20 - Page 655 of 1337
TM 9-2320-260-20
8-15. BLEEDING SERVICE BRAKE SYSTEM
THIS TASK COVERS:
a. Pressure Bleeding Method
b. Manual Method
—
INITIAL SETUP
APPLICABLE MODELS
PERSONNEL REQUIRED
All
Two
MATERIALS/PARTS
REFERENCES (TM)
Hose
TM 9-2320-260-10
Screw-assembled lockwasher
TM 9-2320-260-20P
Brake fluid (Appendix C, Item 8)
Rags (Appendix C, Item 22)
Four locknuts
EQUIPMENT CONDITION
Parking brake set (TM 9-2320-260-10).
I
a. Pressure Bleeding Method
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Remove screw-assembled lockwasher (1) from crossmember (11) and open master cylinder access
panel (2). Discard screw-assembled lockwasher (1).
Clean surface of master cylinder filler plug (3) with clean rag.
Remove filler plug (3) and check that master cylinder (4) is at proper fluid level.
Install bleeder adapter (7) on master cylinder (4),
NOTE
Prior to installation, check that bleeder tank is filled with recom-
mended brake fluid, pressurized at 20-30 psi (138-178 kpa), and
valve is off. Follow manufacturer’s instructions for purging and
preparation.
Connect bleeder tank hose (6) on bleeder adapter (7) and open tank valve (5).
Check hydraulic system for leaks. Correct as necessary.
Clean bleeder screw (8) on master cylinder (4) with clean rag.
Place hose (10) on bleeder screw (8) and place opposite end of hose (10) in a clear container (9) half
full of brake fluid. Ensure hose (10) is below brake fluid level in container (9).
Open bleeder screw (8) and allow brake fluid to flow from master cylinder (4) until no air bubbles
are observed in container (9).
Close bleeder screw (8). Tighten bleeder screw (8) 10-20 lb-ft (14-27 N•m).
Remove hose (10) from bleeder screw (8) and properly dispose of fluid in container (9).
8-30
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