TM 10-4320-344-24
Table 3-1.
Direct Support Troubleshooting Table.
(Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7. NO LOW SUCTION OR DISCHARGE PRESSURE.
(Continued)
Step 12.
Replace actuator (paragraph 3.8.6).
(Model 609-A)
If problem is not corrected go to step 13.
Step 13.
Remove governor control box from governor (paragraph 3.8.6).
Measure
resistance between governor case and pins on governor 5 pin connector.
(Model 609-A)
a.
If any reading is less than 100 ohms replace governor (paragraph
3 . 8 . 6 ) .
b .
If all readings are more than 100 ohms go to step 14. .
Step 1 4 .
Remove cover from governor control box and place jumper between TP1 and
TP2 .
Make sure correct power is available to governor control box.
Actuator output lever should move to full fuel position and remain
there until jumper between TP1 and TP2 is removed.
(Model 609-A)
a .
If actuator output lever does not move to full fuel position replace
governor control box (paragraph 3.8.6).
b.
If actuator output lever does move to full fuel position go to step 15.
Step 15.
Inspect flexible coupling
(All pumping units).
a.
Inspect flexible coupling (paragraph 3.6.5/3.6.6).
b.
Replace flexible coupling (paragraph 3.6.5/3.6.6).
Step 16.
Inspect impeller (All pumping units).
a.
Inspect impeller (paragraph 3.6.7).
b.
Replace impeller (paragraph 3.6.7).
Step 17.
Inspect impeller shaft and bearings (All pumping units).
a .
Inspect impeller shaft and bearings (paragraph 3.6.8/3.6.9).
b .
Replace impeller shaft and bearings (paragraph 3.6.8/3.6.9).
8. CENTRIFUGAL PUMP NOISY.
Step 1.
Inspect flexible coupling.
a . I n s p e c t f l e x i b l e c o u p l i n g ( p a r a g r a p h 3 . 6 . 5 / 3 . 6 . 6 ).
b .
Replace flexible coupling (paragraph 3.6.5/3.6.6).
Step 2.
Inspect impeller.
a . I n s p e c t i m p e l l e r ( p a r a g r a p h 3 . 6 . 7 ).
b .
Replace impeller (paragraph 3.6.7).
Step 3.
Inspect impeller shaft and bearings.
a. Inspect impeller shaft and bearings (paragraph 3.6.8/3.6.9).
b .
Replace impeller shaft and bearings (paragraph 3.6.8/3.6.9).
3-7
