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 TM 55-1905-223-24-18-1
Troubleshooting - CONT
Table 2-2.
Malfunction
lest or Inspection
Corrective Action
SEAWATER COOLING PIPING SYSTEM - CONT
STEP 9. Check for malfunctioning pressure gauge.
a. Test the gauge as follows:
(1) Remove gauge from system (para. 2-340).
(2) Install a gauge of known accuracy to check system.
(3) Replace faulty gauge (para. 2-340).
STEP 10. Check valve jammed by foreign matter.
a.
Remove valve (pare. 2-336).
b. Inspect and clean as necessary.
c. Replace valve (para. 2-336).
STEP 11. Check for defective pressure relief valve.
NOTE
If pressure relief valve is defective, low pump
suction pressure will be noted. Replace relief
valve, para. 2-336.
STEP 12. Check for partially clogged or damaged pump casing or pump discharge
line.
a. Clean pump casing.
b. Clean or replace discharge line.
STEP 13. Check pump for wrong direction of rotation.
Refer to POTABLE WATER PIPING SYSTEM troubleshooting Malfunction 1, Step
14.
STEP 14. Pump speed too low.
a. Check motor output, make sure motor is receiving full voltage and
b. Check voltage, phase, and frequency on motor with specification on
motor nameplate.
STEP 15. Check for binding rotor impeller or seal.
a. Check for freedom of rotation by momentarily starting the motor and
listening for rubbing sound.
b. Replace pump (para. 2-99).
No discharge pressure.
220.
STEP 1. Check for closed discharge valve.
Ensure discharge valve is fully open.
2-167
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