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 151 of 773

TM 9-2320-279-10-1

Table 2-2. Preventive Maintenance Checks and Services for Models M977 and M985

I

Location

tem Interval

Crewmember

No.

Item to

Not Fully Mission

Check/

Procedure

Capable If:

Service

81 After

DRIVER

Material

h. Boom Control Lever.

h. Boom does not

Handling

Move BOOM control lever to

raise to 45° above

Crane

UP position until the boom is

horizontal position.

approximately 45° above

Continued

horizontal.

i. Mast and Boom Control

Levers. Move MAST control

lever to UP position until the

mast is fully erect and the cyl-

inders are fully extended.

Use BOOM control lever UP

simultaneously as required to

maintain the boom at approx-

imately 45° above horizontal

until the mast is fully erect.

Hold the mast control lever to

up position for 2-3 seconds

after mast is fully erect to en-

sure cylinders are fully filled

with oil.

i. Mast cylinders do

not raise completely

before stopping.

2-88

Change 5