TM 9-2320-279-34-3
M977, M985, and M984E1 Crane Maintenance Instructions (Cont)
17-21.1. HOIST MOTOR VALVE ASSEMBLY REMOVAL/REPAIR/INSTALLATlON
(M984E1) (CONT).
NOTE
There are two models of control valves. Model A (Snap-Tite, no longer available as
an assembly) has an SAE #4 brake port. Model
B
port. Removal procedures are identical for both.
(Dana) has an SAE #6 brake
a.
Removal. Remove four screws (1), lockwashers (2), control valve (3), and two preformed
packings (4).
b. Disassembly.
NOTE
Perform steps (1) through (5) for Model A.
Perform steps (6) through (10) for Model B.
(1)
Remove two fittings (1) and preformed
packings (2).
(2)
Remove elbow (3) and preformed
packing (4).
(3)
Remove three plugs (5).
(4)
Remove holding valve (6) from control
valve (7).
(5)
Remove preformed packing (8), backup
ring (9, two backup rings (10),
preformed packing (11), and preformed
packing (12) from holding valve (6).
17-96.2
Change 3
