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 1198 of 1275
TM9-2350-311-20-1
CHECK FOR LEAKS COOLANT TEMPERATURE
.
- Check vehicle for oil, fuel, and coolant leaks.
- Repair any leaks.
- Start engine.
- Set engine speed from 1000 to 1200 rpm.
- Warm up engine to normal operating temperature
while monitoring vehicle temperature water gage.
This may take from 30 to 45 minutes for some vehicles.
If VTM does not display engine
rpm, check: cables and
connectors; and pulse
tachometer. Replace as
needed.
I
Does vehicle water temperature read from 170 to 185°F
(77 to 85°C) after normal warmup period?
NOT E
Go to paragraph 3-3 to
troubleshoot engine and
cooling system for high
temperature. If no problems
are found, go to NG 32 (Figure
3, sheet 29).
NOT E
I
Go to NG 32 (Figure 3,
sheet 29).
After completing repair, rerun GO CHAIN tests to
verify problem has been fixed and that no other
problems exist. Start at GO 2 (Figure 2, sheet 8) if
VTM is already connected. Otherwise start at GO 1
(Figure 2, sheet 1).
Figure 2, Sheet 15 of 20
I-21
Go to Figure 2,
sheet 16.
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