Komatsu D31EX-21, Operation & Maintenance Manual, Page: 120 / 256

OPERATION
OPERATION
3-68
CHECK DUST INDICATOR
1. Open engine side cover on the left side of machine.
2. If the yellow piston at the display portion of dust indicator
(1) becomes red (7.5 kPa), clean the outer element.
After cleaning, press the reset button to reset.
3. Replace any outer element, which has been cleaned 6
times or used for one year. Replace the inner element at
the same time.
4. If the yellow piston rises to above 3/5 (5 kPa) of the trans-
parent portion, replace the inner and outer element.
For details of the method of cleaning the element, see
“CHECK, CLEAN AND REPLACE AIR CLEANER ELE-
MENT (4-19)“.
CHECK OIL LEVEL IN HYDRAULIC TANK, ADD OIL
WARNING
q
When removing the oil filler cap, oil may spurt out, so
stop the engine and wait for the oil temperature to go
down, then turn the cap slowly to release the internal
pressure before removing the cap.
q
If oil has been added to above proper range, stop the
engine and wait for the hydraulic oil to cool down, then
drain the excess oil from the drain plug.
NOTICE
q
Do not add oil if the level is above the H line. This will damage the hydraulic equipment and cause the
oil to spurt out.
q
Always lock the cap with the key.
1. Lower blade to the ground and stop the engine. Wait for 5
minutes before checking oil level. Oil level should be
between the H and L in sight gauge (G).
2. If the level is below the L mark, add oil through oil filler (F).
3. After adding oil, be sure to screw on the oil filler cap and
lock it with the key.
Proper
range