Mechanical Diagnosis 13-4
Engine stops after starting Air in injection pump Bleed fuel system
Fuel filter obstructed Replace filter element
High head pressure Eliminate cause of high head pressure
Vent of fuel tank obstructed Unclog vent
Clogged fuel tank or fuel lines Clean fuel tank and fuel lines
Engine does not develop full power Air cleaner or intake system
clogged
Clean air intake system; clean or replace air filter
Fuel tank vent clogged Unclog vent
Clogged fuel tank or fuel lines Clean fuel tank and fuel lines
Speed adjustment wrong Adjust speed
Insufficient fuel volume leaving
filters
Check for dirty filters or air in system
Delivery of fuel pump insufficient Repair pump
Injection pump timing off Adjust timing
Nozzles defective Repair or replace nozzles
Compression low or unbalanced Overhaul engine
Worn injection pump plungers,
delivery valve defective, injection
rate too low, gum formations
Repair or replace pump
CONDITION POSSIBLE CAUSE REMEDY
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