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 83 of 828
TM 9--2350--311--20--2
2--22
Change 4
2--9
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) — CONTINUED
2--9.3
Vehicle Cleanliness
CAUTION
Do not direct a stream of water or steam against the opening between the hull and turret (turret
ring), grilles, exhaust deflectors, fire control, or armament openings. Damage to components
could result.
The crew should bring a clean vehicle to a scheduled PMCS. It should be dry and not caked with mud. Washing the vehicle
should not be done just before an inspection. Some defects, such as loose parts and oil leaks, may not be noticed immedi-
ately after washing.
2--9.4
General Checks
a. ElectricalConnector/Wires.Checkconnectors;ifloose,tighten.Checkforopeninsulationcracksonwires.Repairwith
electricaltape(item39,AppxD)orreplace.Completecabwiringdiagram,harnesses,andconnectorsaredescribedin
detail in Chapter 8 of this manual.
WARNING
Never tighten hydraulic lines or fittings when hydraulic system is pressurized. Damage to tubes and
fittings could result in injury to personnel.
b. Hydraulic Connector/Lines and Hoses. Check connectors; if loose or if stained by hydraulic fluid, tighten. Check lines
and hoses for cracks, loose clamps, or stains from hydraulic fluid. Repair or replace lines and tubes that are damaged.
c.
Seals. Check for leaks (fluid stains). Check condition of gasket materiel. Replace if deteriorated. Check door/hatch
seals for deteriorations, cracks, and tears.
d. Loose Bolts. Although a loose bolt can be difficultto spotwithout actually applying a wrench, you can often tell by loose
or chipped paint around the bolt head and bare metal or rust present at the base of the bolt head.
e. Welds. Many items are attached to the cab with welds. Damaged welds may be detected by rust or chipped paint
where cracks occur.
INITIAL SETUP
Tools
Artillery and turret mechanic’s tool kit
(CL 5180--95--A12, see SC 9999--01--SKO)
(Q, A, 1500 RDS)
Materials/Parts
GAA (item 18, Appx D) (Q, A)
GMD (item 20, Appx D) (A, 1500 RDS)
Hydraulic fluid, OHT (item 1, Appx D) (A, AOAP)
Lockwashers (8 or 10) (item 88, Appx G) (A, 1500 RDS)
Lockwire (item 32, Appx G) (Q, A)
Lockwire (item 33, Appx G) (Q)
Lubrication fittings (item 14, Appx D) (Q)
References
DA PAM 750--8 (AOAP)
TM 3--6680--316--10 (A)
TM 750--116 (Q)
TM 9--2350--311--10 (Q, A, 1500 RDS)
Back to Top
