TM-9-2320-279-34-3

M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS DIRECT SUPPORT AND GENERAL SUPPORT, VOLUME 3 OF 3

TM-9-2320-279-34-3 - Page 304 of 717

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

TM 9-2320-279-34-3

M977, M985, and M984E1 Crane Maintenance Instructions (Cont)

a. Adjustment.

NOTE

Crane must be at normal operating temperature

for adjustment.

Remove cap (1) and attach suitable pressure

gage to test port (2).

Put crane in operating position

(TM 9-2320-279-10).

Operate BOOM control lever (3)

DOWN.

Check pressure reading.

Reading should be between

3000 psi (20 685 kPa) and

3200 psi (22 064 kPa).

If reading is less than 3000 psi

(20 685 kPa) or more than 3200

psi (22 064 kPa), do steps (6)

through

(10).

If reading is

between 3000 psi (20 685 kPa)

and 3200 psi (22 064 kPa), do

steps

(9)

and

(10).

Loosen locknut (4) and adjust screw (5) to

lower pressure while operating BOOM

control lever (3) DOWN.

Adjust screw (5) to set pressure between 3000 psi

(20 685 kPa) and 3200 psi (22 064 kPa).

Tighten locknut (4).

Change 3

17-145