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 143 of 828
TM 9–2350–311–20–2
3–34
Change 2
3–3
TROUBLESHOOTING CHART — CONTINUED
c.
CAB TRAVERSING SYSTEM — CONTINUED
(1)
CAB WILL NOT TRAVERSE UNDER POWER
OR MANUALLY, BUT HYDRAULIC PRESSURE
IS NORMAL AND CAB LIGHTING OPERATES.
INITIAL SETUP
Test Equipment
Multimeter (item 6, Appx H)
Tools
Artillery and turret mechanic’s tool kit
(SC 5180–95–CL–A12)
References
TM 9–2350–311–10
Equipment Condition
Vehicle MASTER switch to ON (TM 9–2350–311–10)
CAB POWER switch to ON (TM 9–2350–311–10)
TRAVERSE CONTROL switch to POWER
(TM 9–2350–311–10)
1.
Turn MASTER and CAB POWER switches to
OFF.
2.
Disconnect wire 825A from bypass valve
assembly solenoid.
3.
Turn MASTER and CAB POWER switches to
ON.
4.
Ensure TRAVERSE CONTROL switch is in
POWER position.
5.
Place red multimeter lead in wire 825A and black
lead to ground.
6.
Check for voltage.
Is battery voltage present?
Check for cant in excess of 89 mils
(TM 9–2350–311–10). Level vehicle if necessary.
Does cab traverse under power?
yes
no
A
yes
no
Go to step F.
WIRE 825A
SOLENOID
BYPASS
VALVE
ASSEMBLY
B
CONTINUED ON NEXT PAGE
–
+
CAB
POWER
SWITCH
TRAVERSE
CONTROL
SWITCH
Continue normal opera-
tions.
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