TM-9-2350-311-20-2
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS
DECEMBER 1993
TM-9-2350-311-20-2 - Page 91 of 828
TM 9–2350–311–20–2
2–30
Change 2
Table 2-2.
PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR M109 SELF-
PROPELLED HOWITZER – CONTINUED
Location
Item
No.
Not Fully Mission
Capable if:
Procedure
Item to Check/Service
Interval
13
Annually
Recuperator Cover
Gasket and High Pressure
Nitrogen Check
NOTE
Loosen cap screws to stop before
rotating cover to open position.
a. Inspect gasket for serviceability.
b. Replace if unserviceable (para 19–2).
GASKET
SCREW
SCREW
COVER
c. Verify high pressure nitrogen 700
±
25
psi (4827
±
172 kPa) (para 19–2).
14
Annually
Scribe Lines on M15
Quadrant
Verify correctness of scribe lines
(TM 9–2350–311–10).
15
Annually
NBC Equipment
(M109A4/M109A5
Howitzers Only)
WARNING
After suspected NBC exposure of ve-
hicle, all air filter elements in M2A2 air
purifier shall be handled by personnel
wearing NBC protective equipment.
Death or bodily injury can result from
not wearing NBC protective equip-
ment.
NOTE
For general guidance on replacement
of filters, refer to para 17–3:
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