Quantcast POTABLE WATER PIPING SYSTEM - TM-55-1905-223-24-18-20063

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TM 55-1905-223-24-18-2
Table 3-2. Troubleshooting - CONT
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
PROPELLER SHAFT ASSEMBLY
EXPANDER TUBE BRAKE - CONT
STEP 3. Inspect friction shoes for build up of contamination on lining.
Clean friction shoe linings. Refer to paragraph 3-204 .
STEP 4. Inspect rubber actuator tube for hardening or swollen spots.
Replace rubber actuator tube. Refer to paragraph 3-204 .
62. Shaft brake slips when locked.
STEP 1. Check for oil or grease on friction shoes.
Replace friction shoes. Refer to paragraph 3-204 .
POTABLE WATER PIPING SYSTEM
63. Low discharge pressure.
STEP 1. Check for leaking pipes and fitting.
Reseal or replace pipes and welded fittings (para. 3-83).
STEP 2. Check for defective pressure tank.
a. Inspect for leaks at weld joints, excessive corrosion, security, and general condition of tank.
b. Replace or repair tank as necessary (para. 3-83).
STEP 3. Check or defective pump.
a. Excessive impeller running clearance.
CAUTION
Do not allow pump to operate with insufficient impeller clearance.
(1)
Adjust impeller clearance (para. 3-109).
(2)
If adjustment does not restore desired performance. Replace the impeller and raceway
as necessary (para. 3-109).
NOTE
The impeller and raceway are matching parts and must be replaced as a set.
b. Excessive vibration.
(1) Bent shaft or badly worn bearings. Repair pump (para. 3-109).


 


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