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 85 of 828
TM 9–2350–311–20–2
2–24
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
4
Quarterly
Cab Race Ring
Check the cab bearing/race ring assembly
as follows:
a. Remove lockwire (1), three cap
screws (2), and cover (3). Discard
lockwire.
b. Manually traverse cab and look through
access hole to see that race has enough
lubrication. If race surfaces, helical
compression springs, race ring spacers,
and bearing balls are lightly coated with
grease, you are okay. Reinstall ball
turret cover.
c. If lubrication is needed, remove one if
the three plugs (4) around inner race.
Install lubrication fittings and apply
GAA lightly through lubrication fittings
while manually traversing cab through
two complete 6400 mil cycles to coat
bearing ball surface of race. Do not
over lubricate. Remove lubrication fit-
ting, reinstall plugs (4), ball turret
cover (3), cap screws (2), and new
lockwire (1).
1
2
3
4
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