Komatsu PC220LC -8 Operation & Maintenance Manual page 267

OUTLINE OF SERVICE
GREASE
Grease is used to prevent seizure and noises at the joints.
This construction equipment is used under heavy-duty conditions. Always use the recommended grease and
follow the change intervals and recommended ambient temperatures given in this Operation and Maintenance
Manual.
Grease fittings not included in the maintenance section are grease fittings for overhaul, so they do not need
grease.
If any part becomes stiff after being used for long time, add grease.
Always wipe off all of the old grease that is pushed out when greasing.
Be particularly careful to wipe off the old grease in places where sand or dirt sticking in the grease would cause
wear of the rotating parts.
CARRYING OUT KOWA (Komatsu Oil Wear Analysis)
KOWA is a maintenance service that makes it possible to prevent machine failures and downtime. With KOWA, the
oil is periodically sampled and analyzed. This enables early detection of wear of the machine drive parts and other
problems.
We strongly recommend you to use this service. The oil analysis is carried out at actual cost, so the cost is low, and
the results of the analysis are reported together with recommendations which will reduce repair costs and machine
downtime.
KOWA ANALYSIS ITEMS
Measurement of density of metal wear particles
This uses an ICP (Inductively Coupled Plasma) analyzer to
measure the density of iron, copper, and other metal wear
particles in the oil.
Measurement of quantity of particles
This uses a PQI (Particle Quantifier Index) measurer to
measure the quantity of iron particles of 5μm or more, enabling
early detection of failures.
Others
Measurements are made of items such as the ratio of water in the oil, density of the antifreeze coolant, ratio of
fuel in the oil, and dynamic viscosity, enabling a highly precise diagnosis of the machine's health.
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MAINTENANCE