Komatsu D31EX-21, Operation & Maintenance Manual, Page: 145 / 256

OPERATION
OPERATION
3-93
PRECAUTIONS FOR OPERATION 3
PAY ATTENTION TO GAUGES 3
When the red range lights on the HST oil temperature gauge while operating, reduce the load and wait for the tem-
perature to decrease.
PERMISSIBLE WATER DEPTH 3
When operating in water, always keep the bottom of carrier roll-
ers (1) above the surface of the water. Also, be careful that the
engine cooling fan will not come in contact with water. The fan
can be damaged.
After operating the machine for a long time in water, carry out
greasing of the greasing points.
METHOD OF USING BRAKES 3
Do not use the brakes suddenly when traveling at full speed. This will cause premature wear and damage.
REMARK
Always depress the decelerator pedal to lower the engine speed before actuating the brakes.
PRECAUTIONS WHEN TRAVELING UP OR DOWN HILLS 3
USE ENGINE AS BRAKE
When going downhill, move gear shift lever into low speed to run engine at slow speed and travel down slope
using the engine as a brake.
Do not move the joystick to the N position.
When traveling down hills of more than 15°, shift down to 1st speed.
BRAKING WHEN TRAVELING DOWNHILL
When traveling downhill and using the braking force of the engine, use the steering, directional, and gearshift lever
to adjust the engine speed.
Failure to brake may result in overrunning, causing engine trouble.
REMARK
When the machine travels in a straight line down a slope, the machine may deviate slightly to the left or right, but
this is caused by the actuation of the straight-travel compensation mechanism and does not indicate any abnor-
mality.