b. Installtaion
a. Removal
TM 9-2320-280-20-2
7-13. MASTER CYLINDER MAINTENANCE
This task covers:
a. Removal
c. Bleeding
b. Installation
INITIAL SETUP:
Tools
Manual References
General mechanic’s tool kit:
TM 9-2320-280-10
automotive (Appendix B, Item 1)
TM 9-2320-280-24P
Materials Parts
Five locknuts (Appendix G, Item 106)
Equipment Condition
Hood raised and secured (TM 9-2320-280-10).
Personnel Required
One mechanic
One assistant
CAUTION
Cover or plug all open lines and connections immediately after disconnection
to prevent contamination. Remove all plugs prior to connection.
N O TE
Have drainage container ready to catch brake fluid.
1. Disconnect brake lines (5) and (6) from master cylinder (2).
2. Remove locknut (3), washer (4), and proportioning valve bracket (8) from right master cylinder
mounting stud (10). Discard locknut (3).
3. Remove locknut (14), washer (11), capscrew (12), and washer (11) from bracket (17) and splash shield (13).
4. Remove locknut (15), washer (16), and bracket (17) from hydro-boost (1). Discard locknut (15).
CAUTION
Do not lean on master cylinder.
5. Remove two locknuts (9) and master cylinder (2) from hydro-boost (1). Discard locknuts (9).
CAUTION
Ensure O-ring is properly seated on master cylinder prior to installation.
Darnage to master cylinder may result if O-ring is not properly seated.
1. Install master cylinder (2) on hydro-boost (1) with two locknuts (9). Tighten locknuts (9) to 22 lb-ft (30 N*m).
2. Install bracket (17) on hydro-boost (1) with washer (16) and locknut (15). Tighten locknut (15) to
22 lb-ft (30 Nom).
3. Install bracket (17) on splash shield (13) with washer (11), capscrew (12), washer (11), and locknut (14).
Tighten locknut (14) to 26 lb-ft (35 Nom).
4. Install proportionin valve bracket (8) on stud (10) with washer (4) and locknut (3). Tighten
locknut (3) to 22 lb-ft (30 Nom).
5. Connect brake lines (5) and (6) to master cylinder (2).
7-28
