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 249 of 552
TM 9-2350-311-34-2
5
Install linear actuating piston (36) to piston buffer rod (27) with new retaining ring (38).
6
Assemble linear actuating piston (36), valve (42), helical compression spring (41), and guide (40). Carefully
compress helical compression spring. Install new retaining ring (39).
NOTE
Install rubber portion of seal before installing spacers.
7
Install new seal (31) new seal (33), into sleeve bushing (32). Install sleeve bushing, new preformed packing
(34), and new packing retainer (35) onto piston buffer rod (27).
NOTE
If piston buffer rod is new from supply perform step 8.
8
Punch and drill two 0.156 + 0.004 in. (3.962 + 0.102 mm) holes through piston buffer rod (27) using bumper
assembly (23) and round nut (25) for pilot holes.
9
Install helical compression spring (24) onto piston buffer rod (27) and install into buffer cylinder (28). Insert
piston buffer rod through buffer cylinder until threaded portion extends beyond threaded bushing (44). Install
rounded nut (25) and new spring pin (26).
Ensure helical compression spring is tightly compressed. Use care in assembly to prevent acciden-
tal release of helical compression spring, resulting in possible injury to personnel.
10
Push bumper assembly (23) to correctly position. Allow bumper assembly to extend slowly.
11
Install machine bushing (30), new key washer (29), bumper assembly (23), and new spring pin (37) on end
of piston buffer rod (27).
12
Engage key washer (29) locking teeth to machine bushing (30) at bumper assembly end.
Change 2 5-105
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