Hobart 9OC24S Operation Manual page 217

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OPERATION, MAINTENANCE, AND OVERHAUL MANUAL, TM-240A
SELF-PROPELLED GENERATOR SET, SPEC. NO. 5381A
SECTION 2. TROUBLE SHOOTING PROCEDURES
1. Genera I
Trouble shooting is an orderly process of checking and eliminating possible causes of
trouble until the exact cause of a trouble is found. As a rule, the best place to start
looking for the cause of trouble in a circuit is at the source of power. Continue
testing and checking the circuit, step-by-step, in an orderly manner, until the cause
of trouble is located. Use applicable schematic diagrams located in Section 3-1, and
connection diagrams located in Section 5-l.
2. Trouble Shooting Chart
A. Description
The trouble shooting chart lists information under three headings:
(1) Trouble, symptom, and condition
(2) Probable cause
(3) Test, check, and remedy
B.
Use of the Trouble Shooting Chart
Read the trouble symptoms and conditions before proceeding to causes and reme.dies.
For example, at the beginning of the trouble shooting chart under ENGINE, the
first trouble listed is: "Engine will not start. Starter will NOT crank engine".
If the starter WILL crank the engine, then obviously this is not your symptom and
condition.
Go to the next trouble and symptom directly below.
If the starter will NOT crank the engine, look to the right under PROBABLE
CAUSE and TEST, CHECK, AND REMEDY and find the various things which
could cause the trouble and what to do to check and remedy them.
3. Equipment for Trouble Shooting
A good quality multi-scale voltohmmeter is the only instrument required for trouble
shooting. At least two "iumper" leads with "alligator", or similar clips, will be
required. The 12-V, engine electrical system may be used as a source for 12-V DC
power.
Ott 30/73
3-2
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