TM 10-4610-241-24
TO 40W4-13-42
Table 3-1. Direct Support Troubleshooting- continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
CHEMICAL FEED PUMP - continued
2.
CHEMICAL FEED PUMP CIRCUIT BREAKER (CB7) AND/OR OVERLOAD
HEATERS TRIP.
WARNING
High voltages in this equipment can cause serious injury or death. When applying power
during a test, take proper measures to ensure safety of personnel. Never work on
electrical equipment unless there is another person nearby who is familiar with the
operation and hazards of the equipment.
Step 1. Remove power at power source, reset CB7 and/or heater assembly, and disconnect wires on CB7 output
terminal T.
Step 2. Turn on power at power source and flip pump switch momentarily to START.
If circuit breaker trips, check for bare/disconnected wires and tighten loose connections or replace bare
wire. If trouble persists replace CB7. Refer to Paragraph 3-53.
Step 3. Remove power at power source, reconnect wire and disconnect wires from motor starter at T1 and T4.
Step 4. Turn on power at power source and flip pump switch momentarily to START.
If heater assembly trips, check for defective heater, replace as necessary (Paragraph 3-61) and reset
heater assembly.
Step 5. Remove power at power source and disconnect pump cable assembly (Paragraph 3-29).
Step 6. Check pump cable assembly for shorts (Paragraph 3-29).
a.
If a short is indicated, replace cable assembly. Refer to Paragraph 3-29.
b.
If pump cable is not defective, repair chemical feed pump motor. Refer to Paragraph 3-39.
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