TM-9-2350-311-20-1
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS
AUGUST 1994
TM-9-2350-311-20-1 - Page 76 of 1275
TM 9-2350-311-20-1
2-15 PROCEDURES FOR SEMIANNUAL/ANNUAL SERVICES — CONTINUED
ITEM
NO.
TABLE 2-1 UNIT PMCS FOR M109AZM109A3/M109A4/M109A5 HOWITZERS — CONTINUED
INTERVAL
Semiannual
Semiannual
ITEM TO BE
INSPECTED
Fan Gear Case —
Continued
PROCEDURE
Remove from shroud (para 7-6 and 7-7). Clean area
around plugs (9) on fan gearbox housings (10) with dry
cleaning solvent. Remove plug. Check that oil level is up
to bottom of plug hole. If not, remove breather (11) and
add 0-156 unit oil level reaches bottom of hole. Clean
and install plug. Clean breather with dry cleaning
solvent before installing.
Fire Extinguisher
System
Cylinders must not be dropped, struck or
subject to any temperature above 140°F
(60°C). An explosion may result causing severe
injury or death.
a. Remove and weigh cylinders. Cylinders are to be
recharged to “FULL” weight stamped on cylinder if
difference between the “FULL” and “CURRENT" (after
weighing) weight exceeds 1 lb (0.45 kg).
b. Before replacing cylinder, operate the discharge
handles (12) to ensure cables do not bind. Replace
antipilferage seal (13) and wire (14) on control valve
(15). Driver's and outside handles require antipilferage
seal and wire (para 11-25).
c. Check distribution lines for loose fittings, loose
mounting, and cracks.
NOT FULLY
MISSION
CAPABLE IF:
a. Any cylinders
require
recharging.
b. Any binding
or unserviceable
cables and
discharge
handles.
c. Distribution
lines loose,
cracked, or not
mounted tightly.
2-28
WARNIN G
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