TM 10-4610-240-24
TM 08580C-24/2
TO 40W4-13-22
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 0. 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.
a
If sheaves are good, go to step 2.
b
File burrs and sharp edges, and smooth with emery cloth. If damage cannot be repaired, notify
Direct Support Maintenance.
Step 2.
Run R.O pump and check if sheaves wobble.
a
If sheaves do not wobble, go to step 3.
b
If pump or pump motor sheave wobbles, notify Direct Support Maintenance.
Step 3.
Check sheave alinement. Refer to paragraph 2-75.
a.
If sheave alinement is good, go to step 4.
b.
If sheaves are out of alinement, aline sheaves. Refer to paragraph 2-75.
Step 4.
Check belt tension. Refer to paragraph 2-75.
Adjust belt tension if too loose or too tight. Refer to paragraph 2-75.
2.
PUMP IS NOISY.
Step 1.
Check that motor is secured to mounting plate.
a.
If motor is secure, go to step 2.
b.
If motor is not secure, secure motor.
2-34
