TB-9-2320-335-13-P
TRUCK, UTILITY: EXPANDED CAPACITY, IAP/ARMOR READY
TECHNICAL BULLETIN; OPERATOR AND FIELD MAINTENANCE AND REPAIR PARTS AND SPECIAL TOOLS LIST (RPSTL) INSTRUCTIONS
MAY 2008
TB-9-2320-335-13-P - Page 25 of 680
Table 2-1. Unit Level Preventive Maintenance Checks and Services HMMWV.
ITEM
NO.
INTERVAL
ITEM TO BE
INSPECTED
PROCEDURES
NOT FULLY MISSION
CAPABLE IF:
1
Semi-
annually
Brake
System
a. Inspect master cylinder, hydro-booster,
proportioning valve, pressure limiter,
lines, and fittings for leaks and damage.
a. Any leak. Plugged,
broken, or damaged lines
and fittings.
CAUTION
• Use MIL-B-46176, Brake Fluid Silicone
(BFS) for filling master brake cylinder.
Failure to use BFS may cause damage
to brake cylinder.
• Thoroughly clean exterior of master
cylinder cover before removing cover.
Dirt, water, or grease will
contaminate brake fluid, causing
brake system damage.
• Do not use screwdriver to remove
cover. Damage to bail wire may result
(S/N 299999 and below).
• To prevent excessive fluid spillage,
ensure that rubber diaphragm is
completely seated before installing
cover to master cylinder.
NOTE
• Remove cover from brake master
cylinder by moving bail wire using
thumb pressure only (S/N 299999
and below).
• Remove cover from brake master
cylinder by turning cover counter
clockwise (S/N 300000 and above).
• Perform step b. for S/N 299999
and below and step b.1 for
S/N 300000 and above.
b.
Check master cylinder brake fluid
level. Level should be 1/8 in. (3.2 mm)
from top of master cylinder reservoir.
Fill with BFS as necessary.
b.1.
Check master cylinder brake fluid
level. Level should be 1/8 in. (3.2 mm)
from “mid” line of master cylinder
reservoir. Fill with BFS as necessary.
b.
Level below 1/8 in.
(3.2 mm) from top of
master cylinder reservoir.
b.1.
Level below 1/8 in.
(3.2 mm) from “mid” line of
master cylinder reservoir.
MASTER CYLINDER
S/N 300000 AND ABOVE
HYDRO-BOOSTER
S/N 299999 AND BELOW
MASTER CYLINDER
HYDRO-BOOSTER
TB 9-2320-335-13&P
2-3
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