TM 10-4610-239-24
TM 08580B-24/3
Table 2-2. Unit Troubleshooting - Continued
Malfunction
Test or Inspection
Corrective Action
R.O. PUMP ASSEMBLY
1. PUMP DRIVE BELTS FRAY AFTER SHORT USE OR BREAK FREQUENTLY
CAUTION
R.O. pump drive belts must be replaced as a set. Replacement
of a single belt will overstress new belt and result in shortened
life.
Step 1.
Check R.O. pump and pump motor (sheaves) for cracks, chips, burrs, or bent grooves
which may damage belts. File burrs and sharp edges, and smooth with emery cloth.
If sheaves are good, go to step 2.
If damage cannot be repaired, replace damaged sheave. Refer to paragraph 2-122.
Step 2.
Run R.O. pump and check if sheaves wobble.
If sheaves do not wobble, go to step 3.
If motor sheave wobbles, replace motor. Refer to paragraph 2-124.
If pump sheave wobbles, replace pump. Refer to paragraph 2-128.
Step 3.
Check sheave alignment.
If sheave alignment is good, go to step 4.
If sheaves are out of alignment, align sheaves. Refer to paragraph 2-130.
Step 4.
Adjust belt tension. Refer to paragraph 2-121.
2. PUMP ASSEMBLY IS NOISY DURING OPERATION
Step 1.
Check that motor is secured to mounting plate.
If motor is secure, go to step 2.
If motor is not secure, secure motor.
Step 2.
Check that pump and mounting plate are secure to stand assembly.
If pump and mounting plate are secure, go to step 3.
If pump is not secure, secure pump.
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