Komatsu PW130ES-6K Operation & Maintenance Manual page 196

MAINTENANCE.
FAN
Personal injury can result from a fan blade failure. Never pull
or pry on the fan. This can damage the fan blade(s) and
cause fan failure.
Check the fan for cracks, loose rivets (for metal fans) and bent or
loose blades. Make sure it is securely mounted. Tighten the cap-
screws if loose. Replace damaged fans.
CHECK AND TIGHTEN WHEEL NUTS
Order for tightening
Tighten the bolts in the order shown in the diagram. Torque to 450
Nm.
CHECK ELECTRICAL INTAKE AIR HEATER
Before the start of the cold season (once a year), contact your
Komatsu distributor to have the electrical intake air heater
repaired or checked for dirt or disconnections.
CHECK ALTERNATOR
GENERAL
The alternator requires no lubrication since its bearings are fac-
tory lubricated for life and require attention only at the time of
major overhaul.
The alternator is equipped with an integral, transistorized voltage
regulator. If the alternator fails to operate properly, consult your
distributor.
PRECAUTIONS
NOTE: The unit electrical system is negative ground. Be CER-
TAIN the ground polarity is correct when:
WARNING
SERVICE PROCEDURE
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