TM 5-4220-211-12&P
Section II
TROUBLESHOOTING
FAULT
POSSIBLE CAUSE
REMEDY
Engine Does
Starter Does Not Turn
Charge Battery; Tighten Terminals; Replace Starter
Not Start
Fuel Tank Empty or
Fill Tank with Diesel Fuel
Filled with Improper Fuel
Throttle Lever at Stop
Place Throttle Lever at Maximum When Starting
Engine, Primer Button
Engage Primer Button
Not Pulled
Fuel Filter or Lines
Replace Filter Element, Clean Lines
Clogged
Air in Fuel System
Bleed Fuel Lines
Low Compression
Check Piston Rings; Check Valve Condition and
Clearance; Check Head Gasket Condition, Check Rod
Bearing Wear - Overhaul if Necessary
Faulty Fuel Injection
Check Feed Rate of Pump; Adjust or
Pump or Fuel Injector(s)
Replace as Necessary - Replace Injector
Engine Oil Too
Use Oil of the Proper Viscosity for Climate Conditions
Viscous (Heavy)
Improper Governor
Adjust Governor Clearance
Clearance
Engine Starts,
Fuel Primer Button Not
Pull Down Button
Then Stops
Pulled Down
Starting Load Too Great
Reduce Engine Load
Engine Stalls
Fuel Too Hot
Eliminate Cause for Excess Heat In Fuel
When Warm
Engine Runs Unevenly;
Fuel Supply Too Low;
Replace Fuel Filter Element; Check Contents of Tank
Low Output
Filter Clogged
Not Enough Fresh Air
Provide Engine Enclosure with Adequate Openings for
Fresh Air
Air in Fuel System
Bleed Fuel Lines
Fuel Line(s) Leaking
Check and Tighten
Improper Valve Clearance
Adjust Valves
Improper Injection Timing
Check Fuel Pump Timing; Adjust or Repair
or Worn Injection Pump
as Necessary
Air in Fuel System
Bleed System
Poor Quality or
Replace Contents of Tank with Fresh Diesel Fuel
Improper Fuel
Sticking Governor
Clean and Adjust Governor and Change Lube Oil
A-3
