Trouble Shooting Guide

Chapter 8: Trouble Shooting Guide

Check the machine refer to this guide before contacting your service workshop.

Problem

Cause

 

 

 

The engine will not start.

Fuel tank empty

 

Incorrect fuel type

 

Air in fuel system

 

The glow plug system is not working (Fuse FU7)

 

Serious engine damage

 

 

 

Starter does not turn the engine

Glow plugs do not heat up

 

The pedals are affected

 

Brake not applied

 

Hydrostat pedals not in the neutral position

 

Discharged battery

 

Poor contact affecting the battery terminal cable

 

 

connections, starter switch, or starter motor

 

Blown fuse on or by the battery (check 3)

 

Defective starter switch

 

Faulty starter

 

 

 

The engine runs erratically

Air in fuel system

 

Defective excess flow valve

 

Blocked fuel filter

 

Low feed pressure

 

Clogged air filter

 

Blocked fuel tank ventilation

 

Disconnected fuel line (diffuser jet)

 

Defective injector

 

Defective injection pump

 

Defective feed pump

 

Incorrect fuel type

 

Serious engine damage

 

 

 

Abnormal exhaust smoke

Black smoke:

 

 

Incorrect fuel quantity from injection pump

 

 

Defective injector

 

 

Incorrect timing of injection pump

 

 

Clogged air filter

 

Blue smoke:

 

 

Engine oil level too high

 

 

Serious engine damage

 

White smoke:

 

 

Defective cylinder head gasket

 

 

Cracked cylinder head

 

 

Engine oil level too high

 

 

 

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Husqvarna PT26 D manual Trouble Shooting Guide, Problem Cause