TM-9-2320-279-10-1
M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)
OPERATOR’S MANUAL VOLUME 1 OF 2
DECEMBER 1998
CHANGE 5
TM-9-2320-279-10-1 - Page 103 of 773
TM 9-2320-279-10-1
Table 2-1. Preventive Maintenance Checks and Services for Models M977 thru M965E1
Item
No.
Location
Interval
Itemto
Check/
Service
13
14
Before
Before
15
Before
Continued
Gear
Shifter
Engine
Retarder
Crewmember
Not Fully Mission
Procedure
Capable If:
DRIVER
i. Transmission Tempera-
ture Gage. Transmission
temperature gage indicates
operating temperature 160°
F (71° C) to 220° F (104° C)
normal.
j. Check wiper motor for
operation.
k. Check Traction Control
Lever for proper operation.
a. Check transmission shift
lever operation. With engine
switch in “ON ” position, move
shift lever from “N ” to “1 ” then
back to “N ”. Lever should
move freely through all range
detents.
CAUTION
Vehicle must be parked when
making this check. Transfer
case will be damaged if shifted
while vehicle is moving.
b. Check transfer shift lever
operation. With transmission
in
“N ” shift transfer lever
through all range positions.
Lever should move freely
through all range positions.
Check engine retarder for propel
operation. With engine running
and transmission in neutral (N)
run engine at 1900 to 2100 rpm
Place engine brake switch to
“ON ”. Lift foot off throttle treadle
and listen for a popping or chatter
ing sound which indicates the en
gine brake is engaged.
i.
Gage indication is
300° F (149° C) or
more.
a. Lever inoperable
or binds between
range detents.
b. Lever inoperable
or binds between
range detents.
Engine retarder doe
not engage.
Change 5
2-45
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