Komatsu PC490-11, Installation And Instruction Manual

Page: 274 / 492

PRECAUTIONS FOR HIGH SPEED TRAVEL
On uneven roadbeds such as rock beds or uneven roads with large rocks, drive the machine at Lo-speed. When
driving the machine at Hi-speed, set the idler in the forward direction.
• Each time travel speed selector switch (1) is pushed, travel
speed changes repeatedly as Lo → Mi → Hi → Lo. The
travel speed (Lo, Mi, Hi) is displayed on travel speed dis-
play (2).
PERMISSIBLE DEPTH OF WATER, SOIL AND DIRT
NOTICE
When driving the machine out of water, if the angle of the
machine exceeds 15 °, the rear of the upper structure will
go under water, and water will be thrown up by the cooling
fan. This may cause the fan to break. Be extremely careful
when driving the machine out of water.
Do not drive the machine in water or soil or sand deeper than
the center of upper carrier roller (1).
After the job, be sure to supply grease to the parts which have
been under water for a long time until the used grease is pro-
jected. (Around the bucket pin, in particular)
MACHINE OPERATIONS AND CONTROLS OPERATION
3-202