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 88 of 828
TM 9–2350–311–20–2
2–27
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
11
Annually
Cab Traversing
Mechanism –
Continued
d. Traverse cab by power and manual
controls through entire range of 6400
mils:
1. Power
(a)
Turn MASTER switch (4) and
CAB POWER switch (5) to ON
(light lit).
(b)
Turn TRAVERSE CONTROL
switch (6) to POWER position
(red light lit).
(c)
Turn gunner control handle (7)
left for left traverse and right
for right traverse.
(d)
Pull up on override lever on
clutch valve (8) in M109A4/
M109A5 howitzers to activate
solenoid override in the event
of an electrical failure.
(e)
Check for leaks in hydraulic
lines, valves, and controls.
Repair as necessary.
2. Manual
(a)
Turn TRAVERSE CONTROL
switch (6) to MANUAL position
to traverse cab.
(b)
Turn traverse handwheel (9)
to traverse cab.
4
5
6
7
8
9
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