Komatsu D31EX-21, Operation & Maintenance Manual, Page: 182 / 256

GUIDE TO MAINTENANCE
MAINTENANCE
4-2
GUIDE TO MAINTENANCE 4
Do not carry out any inspection and maintenance operation that is not found in this manual.
CHECK SERVICE METER:
Check the service meter reading every day to see if the time has come for any necessary maintenance mainte-
nance to be performed.
KOMATSU GENUINE REPLACEMENT PARTS:
Use Komatsu genuine parts specified in the Parts Book as replacement parts.
KOMATSU GENUINE OILS:
Use Komatsu genuine oils and grease. Choose oils and grease with proper viscosities specified for ambient tem-
perature.
ALWAYS USE CLEAN WASHER FLUID:
Use automobile window washer fluid, and be careful not to let any dirt get into it.
CLEAN OIL AND GREASE:
Use clean oil and grease. Also, keep the containers of the oil and grease clean. Keep foreign materials away from
oil and grease.
CHECKING FOREIGN MATERIALS IN DRAINED OIL:
After oil is changed or filters are replaced, check the old oil and filters for metal particles and foreign materials. If
large quantity of metal particles or foreign materials are found, always report to the person in charge, and carry out
suitable action.
FUEL STRAINER:
Do not remove the strainer from the filler port when adding fuel.
WELDING INSTRUCTIONS:
q
Turn off the engine ignition switch.
q
Do not apply more than 200 V continuously.
q
Connect grounding cable within 1 m of the area to be welded. If grounding cable is connected near instru-
ments, connectors, etc., the instruments may malfunction.
q
If a seal or bearing happens to come between the part being welded and grounding point, change the the
grounding point to avoid such parts.
q
Do not use the area around the work equipment pins or the hydraulic cylinders as the grounding point.
DO NOT DROP THINGS INSIDE MACHINE:
q
When opening inspection windows or the oil filler port of the tank to carry out inspection, be careful not to drop
nuts, bolts, or tools inside the machine.
If such things are dropped inside the machine, it may cause damage and/or malfunction of the machine, and
will lead to failure. If you drop anything inside the machine, always remove it immediately.
q
Do not put unnecessary things in your pockets. Carry only things which are necessary for inspection.