TM 3-4230-218-12&P
Table 3-1.
Operator Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6.
NO WATER PRESSURE - Continued.
Step
Step
7.
LOW
Step
Step
Step
6.
Check for clutch engagement.
Clutch engagement occurs at approximately 1/2 throttle position or
2700 rpm.
The pump pulley will start to turn when pump engage-
ment occurs.
If no pulley movement is observed, notify organizational maintenance.
If pulley movement is observed, proceed to step 7.
7.
If temperature is below freezing, ice may have formed in water
pump.
If ice is in water pump, thaw the unit (see page 2-41).
If there is no ice in water pump, or if temperature is above freez-
ing, contact organizational maintenance.
WATER PRESSURE.
1.
Check control panel WATER PRESSURE REGULATOR setting.
If valve is improperly set, adjust valve for desired reading on
control panel WATER PRESSURE gage.
If valve is properly set or adjusting valve does not change pressure
indication, proceed to step 2.
2.
Check that engine speed is not too low.
If engine speed is low, increase engine speed by adjusting throttle.
If engine speed is normal, proceed to step 3.
3.
Check for loose or worn water pump drive belts.
If drive belts are loose, adjust belt tension (refer to page 3-16).
If drive belts are worn, notify organizational maintenance.
If drive belts are not loose or worn, proceed to step 4.
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