Troubleshooting and repair, Caution – Lincoln Electric CLASSIC SVM194-A Manuel d'utilisation
Page 152
ENGINE PROTECTION SYSTEM TEST PROCEDURE (continued)
PROCEDURE
1. Open the side doors on the Classic® 300
machine.
NOTE: Secure the doors in the open position using
the door restraint system. If the machine
does not have a door restraint system,
remove the doors or securely restrain them
to prevent them from falling closed.
Classic® 300D Perkins powered machines:
The following procedure will temporarily disable
the engine protection system. Be absolutely certain
that engine temperature and oil pressure are with-
in the normal range. IF THE ENGINE IS PERMIT-
TED TO RUN WHITE OVERHEATED OR WITH
TOW OIL PRESSURE, SEVERE ENGINE DAM-
AGE WILL LIKELY RESULT, AND THE ENGINE
WARRANTY WILL NOT COVER THE DAMAGE.
Be absolutely certain that all wires are connected
when the test is completed.
2. Disconnect the lead wire connecting the PC
board to the engine coolant temperature gage
or switch. See wiring diagram.
3. Disconnect the lead wire connecting the PC
board to the engine oil pressure switch.
4. Disconnect the flash/sense lead connecting
the PC board to the engine alternator.
5. Insulate and/or position these leads so they
cannot touch chassis ground, any other electri-
cal conductor, or be damaged by any moving
parts.
6. Start the engine and allow it to run.
7. If the engine still shuts down, thoroughly check
the three wires that had been disconnected in
steps 1 through 3. Be particularly aware of
damaged insulation, or anything that may
cause one of these conductors to come in con-
tact with chassis ground.
8. If no problems are discovered with the wiring
or insulation, the Idler/Engine shutdown PC
board is faulty and should be replaced.
9. If the engine continues to run with these wires
disconnected, one of the engine protections
switches is faulty or the engine alternator is
faulty.
10. Shut off the engine and reconnect any one of
the three leads that had been disconnected in
steps 1 through 3, then start the engine and
allow it to run. If the engine shuts down, the
component that had just been connected is
faulty and should be repaired or replaced.
11. If the engine continues to run after reconnect-
ing one of the wires, repeat step #9, connecting
one of the two remaining wires, then repeat
step #9 again connecting the last wire. Repair
or replace any faulty component.
Be certain to reconnect all lead wires and close the
doors when testing and service is complete.
Classic® 300D Kubota powered machines:
The Kubota engine control module will flash the
engine protection fault light, indicating where the
fault was detected. See the machine schematic for
a list of codes. Use this code to determine what
sensor or associated wiring is causing the problem
and check the wiring.
The sensors and engine control unit are part of the
Kubota engine. If the wiring and connections are in
good condition, the engine should be serviced by a
qualified Kubota service technician.
TROUBLESHOOTING AND REPAIR
F-30
F-30
CLASSIC® 300D & 300G
CAUTION