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DANGEROUS VOLTAGE LEVELS ARE PRESENT WHEN THE TRUCK IS RUNNING AND
CONTINUE TO EXIST AFTER SHUTDOWN IF THE REQUIRED SHUTDOWN PROCEDURES
ARE NOT FOLLOWED.
Before attempting repairs or working near propulsion system components, the following
precautions and truck shutdown procedure must be followed:
•
DO NOT step on or use any power cable as a handhold when the engine is run-
ning.
•
NEVER open any electrical cabinet covers or touch the Retarding Grid ele-
ments. Additional procedures are required before it is safe to do so. Refer to
"Truck Shutdown Procedures", this Section, for additional propulsion system
safety checks to be performed by a technician trained to service the system.
•
ALL removal, repairs and installation of propulsion system electrical compo-
nents, cables etc. must be performed by an electrical maintenance technician
properly trained to service the system.
•
IN THE EVENT OF A PROPULSION SYSTEM MALFUNCTION, a qualified techni-
cian should inspect the truck and verify the propulsion system does not have
dangerous voltage levels present before repairs are started.
•
THE LINK VOLTAGE LIGHTS MUST NOT BE ILLUMINATED WHEN TEST OR RE-
PAIRS ARE INITIATED. It requires approximately 5 minutes after the truck is
shut down before the Link Voltage has dissipated.
•
AN ADDITIONAL 10 TO 15 MINUTES IS REQUIRED FOR THE AUXILIARY
BLOWER MOTOR AND ITS CIRCUITS TO DE-ENERGIZE.
Do not attempt to perform Auxiliary Blower Motor or Blower electrical circuit re-
pairs until the Red warning lights on the Blower Control Panel have turned off
and it has been verified the system is de-energized.
•
PRIOR TO WELDING ON THE TRUCK, maintenance personnel should attempt
to notify the Komatsu Factory Representative.
The welding ground electrode should be attached as close as possible to the
area to be welded.
NEVER weld on the rear of the Electrical Control Cabinet or the retard grid ex-
haust air louvers.
Avoid laying welding cables across or near truck wiring harnesses or power
cables; voltages can be induced in adjacent cables, damaging electrical compo-
nents.
Disconnect the battery charging alternator lead wire and open the battery dis-
connect switches.
E1-2
Index
3/01 E01012
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Troubleshooting
