TM-9-2350-311-34-2

CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS HOWITZER, MEDIUM, SELF-PROPELLED, 155MM

TECHNICAL MANUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE MANUAL

SEPTEMBER 1994

  TM-9-2350-311-34-2 - Page 486 of 552

TM 9-2350-311-34-2
14-6 SAFETY RELIEF VALVE ASSEMBLY
This task covers:
a. Removal
c. Inspection
e. Installation
b. Disassembly
d. Assembly
INITIAL SETUP
Tools
Artillery and turret mechanic’s tool kit
(SC 5180-95-CL-A12)
Bolt, machine 1/4 - 20 x 2 inch long (item 2, Appx F)
Plastic bag (item 6, Appx B)
Preformed packings (2) (item 68, Appx E)
Personnel Required
2
Materials/Parts
Equipment Condition
Cloth (item 12, Appx B)
Hydraulic motor with safety relief valve assembly re-
Hydraulic fluid (item 22, Appx B)
moved (para 9-1)
Lockwire (item 35, Appx E)
References
Motor seal replacement parts kit (item 147, Appx E)
MIL-STD-1949
a. Removal
NOTE
The exterior of the safety relief valve assembly and hydraulic motor must be completely clean
and dry before beginning removal of the relief valve plate.
Removal of the relief valve plate must be performed only in a dust-free room with a filtered air
supply. Personnel should coat hands with clean hydraulic fluid when handling relief valve plate.
Because of the extremely smooth finish on the inside face of the relief valve plate, removal of the
relief
valve plate from the hydraulic motor housing assembly is not recommended unless it is
necessary to service the internal parts of the hydraulic motor. To service the safety relief valve
assembly parts, leave the relief valve plate attached to the hydraulic motor housing assembly
and proceed to disassembly procedures (para 14-6b.).
1
Install a 1/4 - 20 x 2 inch long machine bolt in pin and bearing (1). Pull out on screw to compress safety re-
lief
valve assembly (2) helical compression spring (3).
2
Remove relief valve washer (4) and lockwire (5) from safety relief valve assembly (2) and discard.
3
Remove four plain nuts (6) from four studs (7).
14-26


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