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TM10-3930-660-20
18-6.
MAIN CONTROL VALVE ASSEMBLY - ADJUST/REPLACB
This task covers:
a. Removal
b. Installation
c. Adjust
Initial Setup
Tools
Tool Kit, Automotive Mechanics
Materials/Parts
Container, 1 Gal.
Lockwashers (5)
Cap and Plug Set
Loctite 242 (App. C, Item 39)
Tags (App. C, Item 51)
Lifting Device, 5 Ton Capacity
Personnel Required
TEST EQUIPMENT
Two
Pressure Gauge
Equipment Condition
Reference
Vehicle parked on level ground.
TM10-3930-660-10
Boom placed in horizontal position
and supported with rigid blocking.
Transmission cover removed,
para. 16-6.
Hydraulic oil in the system can be under
pressures over 3000 psi with the engine
OFF .
ALWAYS relieve pressure in
hydraulic lines before attempting to
remove any component in the hydraulic
system.
With engine OFF, starter switch
in RUN position, and MLRS attachment on
the ground, move control levers through
all operating positions several times to
relieve line pressure. Relieve pressure in
hydraulic oil tank by loosening filler
cap very slowly. Failure to follow these
precautions could result in serious
personal injury.
At operating temperatures, hydraulic oil
is hot and under pressure.
Hot oil can
cause injuries.
Allow hydraulic oil to
cool before disconnecting any hydraulic
lines.
18-17
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