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 316 of 773

TM 9-2320-279-10-1

M977 and M985 Tanker Operating Procedures

WARNING

Be sure there are at least two wraps of cable on hoist

drum at all times. Serious injury or death could result if

cable comes off hoist drum while lifting load.

CAUTION

Do not jerk HOIST control lever or load will bounce

causing possible damage to crane or load.

Do not operate crane with boom below horizontal

when there is a load on hook.

For M977, maximum load limit with boom length

under 9 ft (2.75 m) is 4500 lbs (2 043 kg). Maximum

load limit with boom extended over 9 ft (2.75 m) is

2500 lbs (1 135 kg).

For M985, maximum load limit is 5400 lbs (2 452 kg)

for entire boom reach.

NOTE

When crane is overloaded, M977 and M985 overload

systems will automatically shut off power to telescope

boom out, raise boom, or hoist load any higher. The

M977 overload system will also prevent lowering load to

ground or other supporting surface. All crane functions

will be restored in approximately six seconds.

(3)

Move HOIST control lever (3) in UP position to lift load. Move BOOM

control lever (6) in UP position to raise load higher.

(4)

Move HOIST control lever (3) in DOWN position to lower load. Move

BOOM control lever (6) in DOWN position to lower load further.

(5)

Shut down crane (para 2-180.

Change 5

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