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