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FUEL CONSUMPTION EXCESSIVE.
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TM-5-2420-224-20-1 Tractor Wheeled 4x4 DED Small Emplacement Excavator (SEE) and High Mobility Material Handler (HMMH) Manual
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OIL PRESSURE GAGE READS LOW OR NO OIL PRESSURE.
TM 5-2420-224-20-1
Table 3-5. Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
ENGINE (CONT)
8. IDLE SPEED ERRATIC.
WARNING
Diesel fuel is flammable. Do not perform this procedure near fire, flame, or
sparks. Injury or death to personnel could result.
Step 1.
Check for air leaks and damaged fuel lines.
If there are air leaks or damaged fuel lines, tighten loose
connections or replace fuel lines (pages 4-25, 4-44).
If there are no air leaks or damaged fuel lines, go to step 2.
NOTE
If STE/ICE-R CI Engine GO-NO GO Chain does not diagnose cause of problem, return to
this troubleshooting table.
Step 2.
Perform STE/ICE-R CI Engine GO-NO GO Chain test procedures in the DCA
diagnostic mode.
If malfunction is found, refer to List of Tasks (page iii) or
Alphabetical Index (page Index-1) and repair or replace
damaged or faulty components.
If malfunction is not found, notify direct support maintenance.
9. ENGINE KNOCKS WHEN COLD.
Step 1.
Check for low engine oil level.
If engine oil level is low, add oil (TM 5-2420-224-10).
If engine oil level is not low, go to step 2.
Step 2.
Check for stuck fuel injector nozzles by fully depressing accelerator several
times to release needles.
If problem continues, notify direct support maintenance.
10. OIL PRESSURE GAGE READS LOW OR NO OIL PRESSURE.
Step 1.
Check for low engine oil level.
If engine oil level is low, add oil (TM 5-2420-224-10).
If engine oil level is not low, go to step 2.
Change 2

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