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TM 10-4320-348-14
Table 5-1. Direct Support Troubleshooting Table - Continued
Malfunction
Test or Inspection
Corrective Action
2. BLACK SMOKE EXHAUST
CAUTION
Do not operate pump for more than 3 minutes without liquid in the volute.
Reduce load by removing suction hose from liquid.
If color improves, test the fuel injector pump or replace the fuel injector pump. Test fuel injection nozzle, refer to para 5.8
or 5.9.
3. DROP IN ENGINE ROTATION SPEED
Check exhaust smoke color. Check abnormal operating sound.
Fuel system maintenance. (Refer to para 5.8 and 5.9)
4. BLUISH-WHITE EXHAUST SMOKE
Check engine rotation.
Uneven rotation. (Refer to para 5.8 and 5.9)
5. PUMP DOES NOT PUMP
Check pump for leaks between engine and pump casing. (Refer to para 4.9)
Replace shaft seal. (Refer to para 5.5)
SECTION II. DIRECT SUPPORT MAINTENANCE PROCEDURES
INDEX
Para
Page
5.5Centrifugal Pump Assembly Repair and Replacement ................................................................................ 5-4
5.6Pump Casing................................................................................................................................................ 5-9
5.7Diesel Engine Replacement ......................................................................................................................... 5-11
5.8Fuel Injection Nozzle Test and Replacement............................................................................................... 5-13
5.9Fuel Injection Pump Repair and Replacement............................................................................................. 5-16
5.4 DIRECT SUPPORT MAINTENANCE PROCEDURES. Maintenance procedures at direct support maintenance level
include as necessary: removal, cleaning and inspection, repair or replacement, and installation. Unless the procedure
requires special resources or tools, more than one maintenance person, or specific equipment conditions, these are not
listed for each maintenance procedure. They are listed only for those procedures that require them.
5-3
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