Komatsu WA500-6H, Operation & Maintenance Manual

Page: 64 / 412

2.4 Precautions for maintenance Safety
2-38
WA500-6H – VEAM430100
Handling high-pressure hoses
z If oil or fuel leaks from high-pressure hoses, there is danger
that it may cause fire or defective operation, which may lead
to serious injury or fire. If there are any loose hoses or pip-
ing, or any leakage of oil or fuel from the hose or piping
mount, stop operation and tighten to the specified torque.
z
If any damaged hoses are found, stop operations immedi-
ately and contact your KOMATSU distributor.
z
Replace all hoses every 2 years at the latest. The shelf life of
the hose should not exceed 2 years.
z
Hoses must be replaced as soon as the following damage is
noticeable:

damage to the outer layer through to the intermediate
layer,

brittleness in the outer layer,

distortions in pressurised or unpressurised state not con-
forming with the original shape of the installed hose,

leakages,

damage to the hose fittings or to the connection between
fittings and hose,

storage damage.
z
When replacing the hoses, always replace the O-rings, gas-
kets, and other such parts at the same time.
z
See "Periodic replacement of safety critical parts (4-21)".
Precautions for high voltage
When the engine is running or immediately after it has stopped,
high voltage is generated at the injector terminal and inside the
engine controller, so there is danger of electrocution. Never
touch the injector terminal or the inside of the engine controller.
If it is necessary to touch the injector terminal or the inside of the
engine controller, please contact your KOMATSU distributor.
GK043102