Troubleshooting Mechanical Components - Kohler 3APU-HC Manual

Heavy duty truck mobile generator sets

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Table Of Contents

Table of Contents

4.3

Troubleshooting Mechanical Components

Problem

The engine does

Incorrect injection timing.

not start.

Rings worn or sticking.

Valves sticking.

Loose cylinder locknuts.

Obstructed fuel line.

Fuel filter clogged.

Air leaks in fuel system.

Clogged tank vent hole.

Injector sticking.

Injection pump valve sticking.

Faulty fuel feeding pump.

Discharged battery.

Cable connections uncertain or incorrect.

Faulty starting switch.

Faulty starting engine.

Starts and stops.

Clogged air filter.

Governor linkage wrongly set.

Low idle speed.

Fuel filter clogged.

Air leaks in fuel system.

Clogged tank vent hole.

Faulty fuel feeding pump.

Poor acceleration.

Clogged air filter.

Overloaded.

Incorrect injection timing.

Governor linkage wrongly set.

Governor spring broken.

Fuel filter clogged.

Air leaks in fuel system.

Clogged tank vent hole.

Hardened inj. pump rack.

Governor linkage wrongly set.

Unsteady speed.

Air leaks in fuel system.

Hardened inj. pump rack.

Oil level too high.

Black smoke.

Clogged air filter.

Overloaded.

Injector not adjusted.

Extra fuel control level sticking.

White smoke.

Excessive idle operation.

Incomplete run-in.

Incorrect injection timing.

Rings worn or sticking.

Worn cylinder.

Fuel filter clogged.

Air leaks in fuel system.

Faulty fuel feeding pump.

Oil level too high.

Worn main con. rods bearings.

Low oil pressure.

Oil pressure sticking.

Oil pressure regulator not adjusted.

Worm oil pump.

Air into oil suction line.

Faulty pressure gauge or pressure switch.

Oil suction line clogged.

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Possible Causes

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