Trouble Shooting; General; Engine With Accessories - Husqvarna PT26D Workshop Manual

TROUBLE SHOOTING

Trouble shooting

General

The main rule for all trouble shooting is to work methodically. Note what you do and any observations from
the beginning of the work.
This is something that is often neglected. The notes are valuable, partly if you want to check what you have
done – not done, partly when you need to motivate the working hours for trouble shooting.
Also note down how electrical wires are connected before you disconnect them. It can happen that some-
one has made an incorrect connection before and this can cause a malfunction.
Use the wiring diagram and hydraulic diagram to assist you in your work. Look to see whether there are
components in circuits, that do not withstand the load of a short circuit test, perhaps not even the load from
a common test lamp.
When you have found a fault, as a rule, you need to consider: Is this the original fault or has it been caused
by another fault?
Remember that virtually all trouble shooting is an investigation, so be careful not to destroy and "evidence".

Engine with accessories

See Perkins Manual tab SOTA (System Operation Test and Adjust).
Compression test
See Perkins Manual \ SOTA \ Air inlet and Exhaust System \ Compression – Test.
Cooling system
See Perkins Manual \ SOTA \ Cooling System \ Check, Inspect and Test.
Coolant pump
See Perkins Manual \ SOTA \ Cooling System \ Water Pump – Inspect.
Inspection of the fuel system
See Perkins Manual \ SOTA \ Fuel system Inspect and Air in Fuel – Test.
Inspection of the injector
See Perkins Manual \ SOTA \ Fuel system \ Fuel Injector – Test.
Inspection of the alternator with regulator
See Perkins Manual \ SOTA \ Electrical System \ Alternator – Test and Charging System – Test.
Inspection of the starter motor
See Perkins Manual \ SOTA \ Electrical System \ Electric Starting System – Test.
Inspection of the sensors and switches
See Perkins Manual \ SOTA \ Electrical System \ Coolant Temperature Switch – Test and Oil Pressure
Switch – Test.
Inspection of the glow plug
See Perkins Manual \ SOTA \ Electrical System \ Glow Plugs – Test and Glow Plug Circuit – Test.
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