TM-9-2350-311-10

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994

  TM-9-2350-311-10 - Page 129 of 775

TM 9–2350–311–10
Change 3
2–43
Table 2–1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES
FOR M109 SELF-PROPELLED HOWITZER — CONTINUED
Location
Item
No.
Not Fully Mission
Capable If:
Crewmember
Procedure
Item to Check/
Service
Interval
25
Before
Recuperator
Assembly
CHIEF OF SECTION
WARNING
Do not attempt to remove drain plug complete-
ly. Hydraulic fluid in recuperator assembly is
under high pressure and could cause injury.
CAUTION
If drain plug is loosened for draining hydraulic
fluid, check for leaks after tightening cover.
To prevent damage to gasket or cover, loosen
cap screws to stop pins before rotating cover.
Before firing, check pins (1) in recuperator assem-
bly (2) from outside of vehicle, and check pins (3) in
recuperator head (4) from inside vehicle. Pins must
extend from 1/4 to 3/4 inch (6.4 to 19.05 mm). If
pins extend beyond 3/4 inch (19.05 mm), fill recup-
erator assembly (2) by removing valve cap (5) from
valve (6). Fill M3 oil gun (item 17, Table 2–1) and
add hydraulic fluid (item 20, Appx D) until pins ex-
tend 1/4 inch (6.4 mm). If pins extend less than 1/4
inch (6.4 mm), loosen drain plug (7) and drain hy-
draulic fluid until pins extend 1/4 inch (6.4 mm).
Pins (1 and 3)
cannot be
brought into spe-
cified range.
1
2
3
4
5
6
CAP SCREW
COVER
5
6
7


Back to Top