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Troubleshooting
RG,RG34710,5605 –19–07JAN02–1/1
General Troubleshooting Information
Troubleshooting engine problems can be difficult. An
engine wiring diagram is provided in this section to
help isolate electrical problems on power units using
John Deere wiring harness and instrument (gauge)
panel.
Wiring diagrams are shown for the two types of
instrument panels offered for these engines.
Later in this section is a list of possible engine
problems that may be encountered accompanied by
possible causes and corrections. The illustrated
diagrams and troubleshooting information are of a
general nature, final design of the overall system for
your engine application may be different. See your
engine distributor or servicing dealer if you are in
doubt.
A reliable program for troubleshooting engine problems
should include the following basic diagnostic thought
process:
• Know the engine and all related systems.
• Study the problem thoroughly.
• Relate the symptoms to your knowledge of engine
and systems.
• Diagnose the problem starting with the easiest
things first.
• Double-check before beginning the disassembly.
• Determine cause and make a thorough repair.
• After making repairs, operate the engine under
normal conditions to verify that the problem and
cause was corrected.
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PN=120