Komatsu 830E Shop Manual page 51

High Voltage Danger Plates and Caution Plates are
attached to the doors of the Electrical Control Cabi-
net. The High Voltage Plate is also attached to the
blown grid housing, extended range housing, rectifier
housing, inlet duct structure and rear hatch cover.
Before doing any welding on the truck, always dis-
connect the positive and negative battery cables of
the vehicle. Failure to do so may seriously damage
the battery and electrical equipment. Disconnect bat-
tery charging alternator lead wire and isolate elec-
tronic control components before making welding
repairs. (It is not necessary to disconnect or remove
any control circuit cards on electric drive Komatsu
Trucks or any of the "AID" circuit control cards.)
Always fasten the welding machine ground (-) lead to
the piece being welded; grounding clamp MUST
BE ATTACHED AS NEAR AS POSSIBLE to the
weld area. Never allow welding current to pass
through ball bearings, roller bearings, suspensions,
or hydraulic cylinders. Always avoid laying welding
cables over or near the vehicle electrical harnesses.
Welding voltage could be induced into the electrical
harness and possibly cause damage to components.
A WARNING plate is located above the hydraulic
system (APU) quick disconnect fittings in front of the
hydraulic tank which provides instructions to the
operator or technician for towing a disabled truck.
This plate specifies the requirements for an auxiliary
source of supply for hydraulic oil and the proper
hookup.
TEST STEERING AND BRAKE SYSTEM FOR
NORMAL OPERATION BEFORE TOWING.
A wheel motor oil level decal is attached to the gear
cover on both electric wheel motors. This decal
stresses the fact that the truck must be on a level
surface and parked for 20 minutes prior to checking
the oil level. This is necessary in order to get an
accurate reading.
A04046 Warnings and Cautions A4-5