SECTION 10 - ENGINE - CHAPTER 1
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- 03-2008
ENGINE TROUBLESHOOTING
Problems
Possible Causes
Solutions
Engine does not start.
1.
Batteries partially discharged.
Check and recharge batteries. Re‐
place if necessary.
2.
Battery terminal connections cor‐
roded or loose.
Clean, inspect and tighten terminal
nuts. Replace terminals and nuts if
excessively corroded.
3.
Injection pump timing incorrect.
Adjust injection pump timing.
4.
Impurities or water in fuel lines.
Disconnect fuel lines from injection
pump and clean thoroughly. If
necessary clean and dry the fuel tank.
5.
No fuel in tank.
Fill tank.
6.
Fuel supply pump malfunction.
Check and replace pump if necess‐
ary.
7.
Air in fuel system.
Check fuel lines, unions, supply
pump, filters and injection pump for
air; then bleed the air from the circuit.
8.
Starter motor faulty.
Repair or replace starter motor.
9.
Thermostarter faulty.
Check and replace thermostarter if
necessary.
Engine stalls.
1.
Idle speed too low.
Adjust idle speed.
2.
Injection pump delivery irregular. Check injection pump delivery on test
bench.
3.
Impurities or water in fuel lines.
Disconnect fuel lines from injection
pump and clean thoroughly. If
necessary clean and dry the fuel tank.
4.
Fuel filters clogged.
Replace the filter cartridges.
5.
Incorrect valve - rocker arm
clearances.
Adjust the clearance between the
rocker arms and the valves.
6.
Burnt or cracked valves.
Replace the valves.
7.
Air in fuel system.
Check fuel lines, unions, supply
pump, filters and injection pump for
air; then bleed the air from the circuit.
8.
Injection pump drive mechanism
damaged.
Replace damaged parts.
(continued)