Troubleshooting & repair, Idler solenoid test (continued) – Lincoln Electric CLASSIC III SVM 137-A User Manual
Page 84
TROUBLESHOOTING & REPAIR
F-24
F-24
Classic III and IIID
IDLER SOLENOID TEST
(continued)
FIGURE F.7 - SOLENOID LEAD CONNECTIONS
LEADS
56 & 57
SOLENOID
TEST PROCEDURE
1. Turn engine off.
2. Unlatch, lift and secure the left side door.
Note that there are latches at both ends of
the door.
3. Using the 5/16" nut driver, remove the two
washers, nuts, and screws holding the fan
guard. If necessary, remove the fan guard
(Classic IIID only).
4. Locate leads #56 and #57 on the idler sole-
noid.
See Figure F.7 and the Wiring
Diagram. Using the 5/16" wrench, remove
the leads from the solenoid.
5. Using the external voltage supply, apply
12VDC to the idler solenoid terminals.
Attach positive (+) to the terminal where lead
#56 was connected. The solenoid should
activate.
6. The solenoid should deactivate when the
12VDC is removed.
7. If the solenoid does not operate properly,
check for a mechanical restriction in the
linkage or a missing spring.
8. If the linkage is intact and the solenoid
does not operate correctly when 12VDC is
applied, the solenoid may be faulty.
Replace. Normal solenoid coil resistance
is approximately 9 ohms.
9. When the test is complete and the problem
repaired, be sure to reconnect leads #56
and #57 to the idler solenoid.
10. Replace the fan guard if removed earlier
(Classic IIID only).
11. Close and latch the left side door.