Table 4-1. Unit Preventive Maintenance Checks and Services (PMCS)
for M1101, M1102, and Trailer Chassis - Continued
Not Fully Mission
b. Check tire tread depth. Tread should not
be worn beyond level of wear bar (1).
Wear bars (1) are molded across the
tread pattern and are only noticeable in
the valley between the center rib (2) and
the lugs (3). The letters TWI (Tread
Wear Indicator) are molded on the tire
sidewall (4) to aid in locating the wear
bar (1). If excessive wear, replace.
b. Tread is worn beyond level of
Check stud nuts to make sure that they
are not loose or missing. If any are loose,
tighten. If any are missing, replace.
Torque nuts in accordance with para 4-
Any stud nuts are missing.
b. Inspect wheel bearings and races for
damage. If any bearing needs replacing,
replace all bearings on both sides (para
4-33). Repack wheel bearings in accor-
dance with Appendix G.
b. Any damage is found.
Inspect wheel cylinders for leaks or
Any leaks or damage is found.
d. Inspect inside of drum for scoring. If
scored, notify DS maintenance.
d. Any scoring is evident.
Inspect brake shoes for glazing or wear.
If any shoe needs replacing, replace all
shoes on both sides (para 4-24).
Brakeshoe is glazed or thickness
is less than 1/8 in. (3.2 mm).
Adjust service brakes (para 4-23).