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TROUBLESHOOTING & REPAIR
F-11 F-11
Classic III and IIID
TROUBLESHOOTING GUIDE Observe Safety Guidelines
detailed in the beginning of this manual.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
216-383-2531 or 1-800-833-9353.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
ENGINE PROBLEMS
The engine “cranks” but will not
start (Classic III gasoline models
only).
1. Check for adequate fuel supply.
2. Make sure the ignition switch is
in the “ON” position.
1. Check the ignition switch for
proper operation. Check the
associated leads for loose or
faulty connections. See the
Wiring Diagram.
2. Check the fuel shut-off solenoid.
Make sure it is opening when
12VDC is applied to it. See the
Wiring Diagram.
3. The engine ignition system or
engine may be in need of ser-
vice.
The engine “cranks” but will not
start (Classic IIID diesel models
only).
1. Check for adequate fuel supply.
2. Make sure the ignition switch is
in the “ON” position.
3. Press the glow plug button for
10 to 20 seconds.
4. Maker sure the engine protec-
tion “Reset” button is pressed.
5. Check the fuse in the engine
protection relay. See the Wiring
Diagram.
6. If the fuel supply is cut off or
runs out while the fuel pump is
operating, air may be entrapped
in the fuel distribution system. If
this happens, bleeding of the
fuel system may be necessary.
See the Engine Operating
Manual.
1. Check the ignition switch for
proper operation. Check the
associated leads for loose or
faulty connections. See the
Wiring Diagram.
2. Check the pump solenoid and
fuel lift pump. Make sure they
are operating when 12VDC is
applied to them. See the Wiring
Diagram.
3. The engine protection relay may
be faulty. Replace.
4. The engine fuel injectors may
need service.