Avoid Mixing Oil; Lock Inspection Covers; Bleed Air From Hydraulic Circuit; Precautions When Installing Hydraulic Hoses - Komatsu PW98MR-10 Operation & Maintenance Manual

MAINTENANCE
• When checking and replacing the oil or filters, move the machine to a place where there is no dust and take
care to prevent dust from entering the system.

AVOID MIXING OIL

Never mix different brand or grade of oil. If a different brand or grade of oil has to be added, drain the old oil and
replace all the oil with the new brand or grade of oil.

LOCK INSPECTION COVERS

Lock inspection cover securely into position with the lock bar, etc. If inspection or maintenance is performed with
inspection cover not locked in position, there is a danger that it may be suddenly shut by the wind and cause
personal injury.

BLEED AIR FROM HYDRAULIC CIRCUIT

When hydraulic equipment is repaired or replaced, or the hydraulic piping is disconnected, the air must be bled
from the circuit. When bleeding air, see "METHOD FOR BLEEDING AIR FROM HYDRAULIC CIRCUIT
(4-31)".

PRECAUTIONS WHEN INSTALLING HYDRAULIC HOSES

• When removing parts at locations where there are O-rings or gasket seals, clean the mounting surface, and
replace them with new parts.
When doing this, be careful not to forget to assemble O-rings and gaskets.
• When installing the hoses, do not twist them or bend them sharply.
If they are installed so, their service life will be extremely shortened and they may be damaged.

CHECKS AFTER INSPECTION AND MAINTENANCE

If you forget to perform the inspection and maintenance, unexpected problems may occur, and this may lead to
personal injury. Always observe the following.
Checks after operation (with engine stopped)
• Have any inspection and maintenance points been forgotten?
• Have all inspection and maintenance items been performed correctly?
• Have any tools or parts been dropped inside the machine? It is particularly dangerous if parts are dropped
inside the machine and get caught in the lever linkage mechanism.
• Are there any leakage of coolant or oil? Have all nuts and bolts been tightened?
Checks while the engine is running
• For details of the checks when the engine is running, see SAFETY, "TWO WORKERS FOR MAINTE-
NANCE WHEN ENGINE IS RUNNING (2-40)" and pay attention to safety.
• Increase the engine speed to check for the leakage of fuel or oil.
• Check if the inspected and serviced area is normally operated.

FUEL AND LUBRICANTS TO MATCH THE AMBIENT TEMPERATURE

It is necessary to select fuel or lubricant according to the ambient temperature.
For detail, see "RECOMMENDED FUEL, COOLANT, AND LUBRICANT (7-5)".

CLOSE ENGINE HOOD SECURELY

When closing the engine hood after inspection or maintenance, make sure that the catch is securely locked.
If the engine hood catch is not locked, there is a danger that the engine hood may open.
WENAM00061
PRECAUTIONS FOR MAINTENANCE
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