Troubleshooting schedule

 

 

 

Problem

Procedure

 

 

 

 

 

 

 

Engine does not start

There is no fuel in the fuel tank

 

 

 

 

 

Air in fuel system

 

 

 

 

 

Incorrect fuel type

 

 

 

 

 

Ignition system inoperative

 

 

 

 

 

Serious engine damage

 

 

 

 

 

 

 

Starter motor does not turn over the engine

Battery flat

 

 

 

 

 

Poor contact affecting the battery terminal cable connections, ignition

 

 

lock, or starter

 

 

 

 

 

Power take off (PTO) activated

 

 

 

 

 

Air in fuel system

 

 

 

 

 

Fuse on or near the battery blown (check 2 off)

 

 

 

 

 

Start lock broken

 

 

 

 

 

The parking brake is not on

 

 

 

 

 

Faulty or improperly adjusted parking brake switch

 

 

 

 

 

Faulty starter motor

 

 

 

 

 

 

 

Engine does not run smoothly

Faulty relief valve

 

 

 

 

 

Clogged fuel filter

 

 

 

 

 

Air filter clogged

 

 

 

 

 

Fuel tank vent blocked

 

 

 

 

 

Low feed pressure

 

 

 

 

 

Loose fuel pressure line (injector pipe)

 

 

 

 

 

Faulty fuel injector

 

 

 

 

 

Faulty injection pump

 

 

 

 

 

Faulty feed pump

 

 

 

 

 

Incorrect fuel type

 

 

 

 

 

Serious engine damage

 

 

 

 

 

 

 

Abnormal exhaust smoke

 

 

 

 

 

Black smoke

Incorrect amount of fuel from injection pump

 

 

 

 

 

Faulty fuel injector

 

 

 

 

 

Incorrect timing of fuel injection pump

 

 

 

 

 

Air filter clogged

 

 

 

 

 

 

 

Blue smoke

Engine oil level too high

 

 

 

 

 

Serious engine damage

 

 

 

 

 

 

 

White smoke

Cylinder head gasket damaged

 

 

 

 

 

Cylinder head cracked

 

 

 

 

 

Engine oil level too high

 

 

 

 

 

 

 

Engine seems to have no power

Air filter clogged

 

 

 

 

 

Air in fuel system

 

 

 

 

 

Clogged fuel filter

 

 

 

 

 

Faulty relief valve

 

 

 

 

 

Low feed pressure

 

 

 

 

 

Faulty feed pump

 

 

 

 

 

Incorrect timing of fuel injection pump

 

 

 

 

 

Serious engine damage

 

 

 

 

38 – English

Page 38
Image 38
Husqvarna P 525D, P 520D manual Problem Procedure Engine does not start, Starter motor does not turn over the engine