TM 9-2320-279-34-3
Change 6
17-145
M977, M985, and M984A1 Crane Maintenance Instructions (Cont)
a. Adjustment.
NOTE
Crane must be at normal operating temperature
for adjustment.
(1)
Remove cap (1) and attach suitable pressure
gage to test port (2).
(2)
Put crane in operating position
(TM 9-2320-279-10).
(3)
Operate MAST control lever (3)
UP.
(4)
Check pressure reading.
Reading should be between
3000 psi (20 685 kPa) and
3200 psi (22 064 kPa).
(5)
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).
(6)
Loosen locknut (4) and adjust screw (5) to
lower pressure while operating MAST control
lever (3) UP.
(7)
Adjust screw (5) to set pressure between 3000 psi
(20 685 kPa) and 3200 psi (22 064 kPa).
(8)
Tighten locknut (4).
