TM 9-2350-247-20-1
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDING
LUBRICATION INSTRUCTIONS — Continued
0128 00
ITEM
NO.
INTERVAL
MAN-
HOUR
ITEM TO BE
CHECKED OR
SERVICED
CREWMEMBER
PROCEDURE
EQUIPMENT
NOT READY/
AVAILABLE
IF:
a. Immediately after road test cautiously feel all
wheel and idler hub for noticeable difference in
temperature between hubs. An overheated hub
indicates that bearing is out of adjustment,
poorly lubricated, or damaged.
Any Class III
leaks, cold
shocks, or bad
bearings.
b. Check temperature of shock absorbers. Shock
absorbers should be warm. A cold shock
absorber is faulty.
c. Visually check inside and outside of carrier for
fuel, oil, or hydraulic leaks.
3
Semi-
Annual
Idle Test
CAUTION
Avoid lengthy engine idling. This causes
coolant temperature to drop below
operating temperature and can shorten
engine life.
a. Run engine at 800 rpm for 3-5 minutes with
range selector in 2 to 3 range and brakes locked
until normal operating temperature is reached.
Engine runs
hot or rough.
b. If outside temperature is less than 85 degrees F
(29 degrees C), normal operating temperature
should be 160 degrees F to 200 degrees F (71
degrees to 93 degrees C). If outside air
temperature is greater than 85 degrees F (29
degrees C), normal operating temperature
should be 160 degrees to 225 degrees F (71
degrees to 107 degrees C).
c. With range selector in N (M548A1) or SL
(M548A3), engine should idle smoothly at 650
to 700 rpm.
d. High or low engine idle speed is usually caused
by accelerator linkage being out of adjustment.
Adjust linkage if necessary (WP 0197 00 or
WP 0200 00).
e. Rough idling is usually caused by faulty injector
timing and rack setting, faulty injectors or air in
the injection system. Notify your supervisor.
0128 00-22
