Precautions For Operation - Komatsu PC290LC-11 Operation & Maintenance Manual

MACHINE OPERATIONS AND CONTROLS OPERATION
PROHIBITION OF HIGH-SPEED TRAVEL OPERATIONS ON ROUGH GROUND
If the machine travels on rough ground (rock-bed, etc.) at high
speed, large push-up loads are applied to the chassis, thus the
service life of the chassis is shortened.
When driving on rough ground (rock-bed, etc.), direct the idler
(1) having the cushion mechanism in the travel direction and
drive the machine at low speed.
DO NOT TRAVEL LONG -TIME CONTINUOUSLY
If the machine travels continuously at high speed for 1.5 hours
or more, the temperature of lubricating oil inside the track roll-
ers and final drive will rise up. This may cause breakage to the
oil seal or leakage of oil.
When traveling continuously for a long time, stop the machine
for 30 minutes every 1.5 hours for the lubricating oil inside the
track rollers and final drive to cool down.
If the machine travels continuously for a long time with the
tracks loosened, it may break the undercarriage parts.
When driving the machine for a long time, check the track ten-
sion every 1.5 hours and adjust any looseness.
For the adjustment, see MAINTENANCE, "METHOD FOR CHECKING AND ADJUSTING TRACK TENSION
(4-25)".

PRECAUTIONS FOR OPERATION

PRECAUTIONS FOR TRAVELLING
Travelling over boulders, tree stumps, or other obstacles will
cause a big shock to the chassis (and in particular to the under-
carriage), and this will cause damage to the machine. For this
reason, always remove any obstacles or drive the machine
around them, or take other steps to avoid travelling over such
obstacles as far as possible.
If there is no way to avoid travelling over an obstacle, reduce
the travel speed, keep the work equipment close to the ground,
and try to drive the machine so that the centre of the track
passes over the obstacle.
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