TM 9-2320-279-34-3
M977, M985, and M984E1 Crane Maintenance Instructions (Cont)
17-32.1. LIFT DOWN AND SHUT DOWN SOLENOIDS AND VALVE
REMOVAL/REPAIR/INSTALLATION (M984E1).
This task covers:
a. Removal Boom Up Solenoid
f. Installation Shut Down Solenoid
b. Installation Boom Up Solenoid
g. Removal Boom Valve
c. Removal Boom Down, Hoist, and Telescope
h. Installation Boom Valve
Solenoid
i. Disassembly
d. Installation Boom Down, Hoist, and Telescope j. Cleaning/Inspection
Solenoid
k. Assembly
e. Removal Shut Down Solenoid
l. Follow-on Mainentance
INITIAL SETUP
Models
M984E1
Test Equipment
None
Special Tools
None
Supplies
None
Personnel Required
MOS 63W, Wheel vehicle repairer
References
None
Equipment Condition
TM or Para
Condition Description
TM 9-2320-279-10 Shut off engine.
Para 17-28.3
Cover removed (only for
shut down solenoid).
NOTE
All solenoids are repaired the
same.
Special Environmental Conditions
None
General Safety Instructions
None
Level of Maintenance
Direct Support
a. Removal Boom Up Solenoid.
(1)
(2)
(3)
Loosen screw (1) and remove
plug (2) and seal (3).
Disconnect two hydraulic
lines (4) from solenoid (5).
Remove two screws (6),
lockwashers (7), washers (8), and
solenoid (5).
b. Installation Boom Up Solenoid.
(1) Install solenoid (5) with two
washers (8), lockwashers (7), and
screws (6).
(2) Connect two hydraulic lines (4).
(3) Install seal (3), plug (2), and
screw (1).
17-150
