97
G20, 30, 40 SIIIA Operation & Maintenance Manual
Engine overheat.
Cooling system defect
Insufficient coolant volume.
Fan belt slippage.
Thermostat malfunction.
Radiator filler cap malfunction.
Cooling system interior fouled.
Radiator clogged.
Improper servicing
Engine over-loaded.
Air cleaner element clogged.
Insufficient airflow/restriction.
Restricted coolant flow (high concentration of antifreeze,
etc.)
Low oil pressure
Lack of oil
Oil leakage
High oil consumption
Wrong oil
Wrong type and viscosity.
High coolant temperature.
Over heat.
Clogged filter and strainer.
Clean and/or replace
Worn bearings and oil
pump.
Replace
Faulty relief valve.
Replace
Low engine output
Incorrect injection pump
adjustment
Incorrect injection timing
Too far advanced.
Too far retarded.
Injection nozzle malfunction Incorrect injection pressure.
Incorrect spray condition.
Insufficient fuel supply to
the injection pump
Lack of fuel in tank.
Air in injection pump.
Fuel filter clogged.
Overflow valve malfunction.
Governor malfunction
Incorrect engine control
adjustment.
Deteriorated governor
spring.
Low cylinder compression
pressure
Cylinder compression
leakage
Incorrect valve clearance
adjustment.
Injector nozzle
misalignment.
Cylinder bore wear.
Insufficient air intake
volume.
Air cleaner clogged.
Restricted air flow.
Summary of Contents for G20 SIIIA
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