TM-9-2320-279-20-1
M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)
TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 1 OF 3
TM-9-2320-279-20-1 - Page 52 of 985
TM 9-2320-279-20-1
Table 2-1.
Unit Level Preventive Maintenance Checks And Services
Item Interval
Item To Be
No.
Inspected
Procedure
Not Mission
Capable If:
1
Semi-
Pre-
f. With vehicle speed approximately
Annual
f. Steering binds,
Service
5 mph (8 kph) turn steering wheel to
grabs, wanders or
Checks
left, then right, to detect steering
backlash, shimmy or freeplay of
freeplay is more
than 1-1/2 inch (38
Continued
more than 1-1/2 inches (38 mm) in
either direction. Vehicle should re-
mm) in either direc-
tion.
spond instantly. With vehicle mov-
ing on straight, level terrain, lightly
hold steering wheel to check for pull
and wandering.
g. Apply brake pedal with steady
force. Vehicle should slow down and
g. Brakes chatter,
stop without pulling to one side or
pull to one side or in-
jerking. Release brake pedal. The
operative.
Brakes
will not release.
brakes should release immediately
and without difficulty.
h. Observe vehicle response to road
shocks, side sway or continuous
h. Handling is un-
stable.
bouncing indicates a malfunction.
AFTER ROAD TEST
a. Make sure the vehicle has been
cleaned of mud, gravel, etc., from the
underbody, outside and crew com-
partment area.
b. Perform STE-ICE GO Test:
GO2 FIRST PEAR-STARTER
GO4 ENGINE START, LUBE
GO5 ENGINE W/U COOLANT
GO8 COMPRESS UNBALANCE
CAUTION
Do not hold steering wheel at full left
or right position for longer than 10
seconds. Oil overheating and pump
damage can result.
c. With vehicle stopped, turn steer-
ing wheel to extreme left, then to the
extreme right to check for hard steer-
ing.
c. Hard steering is
evident.
d. Check engine operation at all
speeds. Ensure that engine does not
go over engine governed speed - no
load (2175-2275 rpm).
d. Engine governed
speed - no load is be-
low 2175 rpms or ex-
ceeds 2275.
2-6
Change 2
Back to Top
