Engine Shutdown Relay Test Procedure - Lincoln Electric Fleet 400 Service Manual

LINCOLN ELECTRIC

ENGINE SHUTDOWN RELAY TEST PROCEDURE

Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized
repairs performed on this equipment may result in danger to the technician or machine operator and will
invalidate your factory warranty. For your safety and to avoid electrical shock, please observe all safety
notes and precautions detailed throughout this manual. If for any reason you do not understand the test
procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department
for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
TEST DESCRIPTION
This test will determine if the Engine Shutdown Relay is functioning properly.
MATERIALS NEEDED
Volt/Ohmmeter
12 VDC Power Supply
Wiring Diagram
TEST PROCEDURE
1. Turn off the engine on the Fleet 400 machine.
2. Perform the Case Cover Removal Procedure.
3. Locate the engine shutdown relay. See Figure F.7. See Wiring Diagram.
4. Carefully remove the relay from it's mounting / wiring bracket.
5. Using a volt/ohmmeter, measure the resistance of the relay coil from terminal 86 (+) to terminal 85
(-). See Figure
6. Using a volt/ohmmeter and a 12 VDC power supply, perform the tests outlined in
Figure F.8. See Wiring Diagram. Apply positive 12 VDC to terminal 86 and negative to terminal 85.
7. If any of the tests fail, the engine shutdown relay may be faulty and should be replaced.
8. Carefully place the engine shutdown relay into it's mounting / wiring bracket.
9. Perform the Case Cover Replacement Procedure.
F.8. See Wiring Diagram. Normal resistance should be approximately 90 ohms.
Fleet™ 400 Service Manual
Table F.2. See
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