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 TM 55-1905-223-24-11
TABLE 3-1. Operator Troubleshooting Procedures
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
A remove status pump light constantly lit, Power On light is lit.
STEP 1. Check for pump motor failure due to low current (winding separation), or highcurrent (motor
overload tripped). If symptom still exists, replace the capacitor or the motor on the waste
disposer (paragraph 3-9 as required by test).
2.
Unit stops or fails to run.
STEP 1. Defective capacitor on the waste disposer. Replace faulty capacitor on the waste disposer as
required by test (paragraph 3-9).
3.
Centrifugal pump operates but is noisy or vibrates excessively (discharge, flow, or sludge.
STEP 1. Check for debris trapped in pump. Remove and clear pump (paragraph 2-20,2-21, or 2-22
for removal; paragraph 3-9 t clear).
4.
Sewage leakage from a pump or a piping connection.
STEP 1. Check for defective shaft seal or gasket. Replace the faulty seal or gasket on the waste
disposer.
5.
Waste disposer operates noisy or vibrates excessively.
STEP 1. Check for debris trapped in disposer. Remove disposer and clear debris (paragraph 3-9).
STEP 2.
Check for broken rippers.
Replace the waste disposer turntable and ripper assembly
STEP 3. Check for defective motor bearings. Replace the waste disposer bearing (paragraph 3-9).
6.
Large amounts of grease or oil on motor surfaces.
STEP 1. Check for overheating due to motor binding. On waste disposer motor, replace the bearing or
motor as required (paragraph 3-9).
7.
Sanitary unit working but processes slowly.
STEP 1. Check for worn or damaged rippers in the waste disposer. Replace the waste disposal
turntable and rippers (paragraph 3-9).
3-5
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