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 MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
06 GROUP STORAGE BATTERY. (Refer to TM 9-6140-200-14).
1. GRAVITY LESS THAN 1.215.
Step 1. Check for discharged battery.
Charge battery, and tighten all connections.
Step 2. Check for broken connections between generator and battery.
Repair all connections.
Step 3. Check if voltage regulator is operating properly.
Replace a defective regulator (para. 5-25).
Step 4. Check if generator is operating properly.
Check and make necessary repairs.
2. VERY LOW SPECIFIC GRAVITY OR NO READING OBTAINABLE ON HYDROMETER.
Step 1. Check if plates badly sulphated.
Cycle battery (TM 9-6140-200-14).
Step 2. Check if battery polarity is reversed. Generator not charging properly.
Check connection and correct. Check and repair generator or regulator.
3. LOW ELECTROLYTE LEVEL IN CELL.
Step 1. Check for open charging circuit.
Trace circuit and make corrections. Refill as required.
4. BATTERY DISCHARGES OVERNIGHT.
Step 1. Check for short circuits in wiring.
Test all circuits connected to battery and repair, or replace.
07 GROUP-PUMPS GENERAL
1. PACKING GLAND LEAKS.
Step 1. Check if packing is loose.
Adjust packing gland.
2. PUMP DOES NOT DELIVER RATED CAPACITY.
Step 1. Check if impeller is worn.
Replace impeller.
Step 2. Check for leaks in suction line allowing pump to pull air.
Inspect piping, repair leak.
Step 3. Check if pump rpm low.
Check rpm, bring up to rating.
Step 4. Check clutch adjustment.
Adjust clutch.
Step 5. Check if suction line closed.
Open valve
3. NOISY OPERATION
Step 1. Check if pump out of alignment
Realign.
Step 2. Check for excess heat in bearings.
Recheck alignment.
08 GROUP-FUEL TRANSFER PUMP.
1. PUMP LEAKS AROUND SHAFT.
Step 1. Check for leaking packing gland or worn packing.
Tighten or replace packing.
2. PUMP DOES NOT DISCHARGE AFTER RUNNING 1 MINUTE.
Step 1. Check valves in system for proper alignment.
Align valves (para. 2-12).
3. PUMP MOTOR
See troubleshooting on dc motors in group 04.
POTABLE PUMP. (sanitary water pump same)
1. PUMP WILL NOT PRIME.
Step 1. Check if cup leather thoroughly soaked.
Soak leathers in water.
Step 2. Check for leaky valve plate gasket.
Replace gasket: tighten bonnet capscrews.
Step 3. Check for valves not seating properly or valves sticking to seat.
Clean dirt from valves and seats. See that there are no burrs at valve seat openings.
Step 4. Check for leaky suction line.
Inspect all lines, tighten joints.
2. PUMP LOOSES PRIME AFTER BEING IN OPERATION.
Step 1. Check if bleeder holes in valve pate are plugged.
l
Open bleeder holes.
Step 2. Check for dirt under valves.
Clean valve seats.
3-16
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