TM 5-3810-231-12
46. Engine Hard to Start or Fails to Start
Probable cause
Possible remedy
Restricted air intake ................................ .......................... Inspect and service air cleaner (para. 33).
Out of fuel or fuel shut-off closed ................................ ...... Inspect and service fuel tank.
Restricted fuel lines or dirty fuel filter ................................ Inspect and service fuel filter (para. 38).
Loose injector inlet or drain connection ............................. Inspect and tighten as necessary (para. 65).
Long idle periods ................................ ............................... Do not allow engine to idle for long periods. When not in use
shut engine down.
47. Excessive Fuel Consumption
Probable cause
Possible remedy
Restricted air intake ................................ .......................... Inspect and service air cleaner (para 33).
External or internal fuel leaks................................ ............ Inspect, tighten and replace fuel lines as necessary (para. 64).
Engine overloaded ................................ ............................ Reduce load.
48. Excessive Oil Consumption or Dilution
Probable cause
Possible remedy
External or internal fuel leaks................................ ............
Inspect, tighten and replace fuel lines as necessary (para. 64).
Loose injector inlet or drain connection .............................
Inspect and tighten as necessary (para. 65).
External and internal oil leaks ................................ ...........
Tighten external oil lines (para. 73). Report to proper authority.
Wrong grade oil for weather conditions .............................
Reference current lubrication order.
49. Starter Fails to crank Engine
Probable cause
Possible remedy
Poor electrical connection ................................ ................. Clean and tighten battery cables and other electrical
connections. Replace if necessary (para. 89).
Starter switch defective................................ ..................... Replace switch (para. 87, 90).
Faulty starter ................................ ................................ ..... Replace starter (para. 88).
Faulty batteries ................................ ................................ . Replace batteries (para. 89).
Starter brushes worn ................................ ......................... Replace brushes (para. 88).
Internal engine seizure ................................ ...................... Report to proper authority.
50. Battery-Charging Alternator Not Charging
Probable cause
Possible remedy
Faulty alternator ................................ ................................ Replace or repair alternator (para. 85).
V-belt loose, broken or slipping ................................ ......... Adjust or replace V-belt (para. 39 and 96).
Alternator brushes worn ................................ ..................... Replace brushes (para. 85).
Loose wiring ................................ ................................ ...... Inspect and tighten (para. 92).
51. Engine Clutch Slips or Will Not Engage Properly
Probable cause
Possible remedy
Incorrect clutch adjustment ................................ ............... Adjust clutch (para. 103).
Control linkage loose or out of adjustment ......................... Tighten or adjust control linkage (para. 104).
52. Main Drive Chain Excessively Noisy
Probable cause
Possible remedy
Defective chain................................ ................................ . Replace chain. Report to direct support maintenance.
Worn sprockets ................................ ................................ . Replace sprocket. Report to direct support maintenance.
Improper adjustment ................................ ......................... Adjust and align drive chain. Report to direct support
maintenance.
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