Outline Of Hydraulic System - Komatsu PW160-7H Operation & Maintenance Manual

MAINTENANCE
● Services relating to the electric system are (1) check of fan
belt tension, (2) check of damage or wear in the fan belt and
(3) check of battery fluid level.
Never remove or disassemble any electric components
●
installed in the machine.
Never install any electric components other than these speci-
●
fied by Komatsu.
Be careful to keep the electric system free of water when
●
washing the machine or when it rains.
Since the controller for the control system may cause mal-
●
function due to external wave interference, before installing a
radio receiver and a walkie-talkie or citizen band, consult your
Komatsu distributor.
When working on the seashore, carefully clean the electric
●
system to prevent corrosion.
When installing a car cooler or an other electrical equipment,
●
connect it to an independent power source connector. The
optional power source must never be connected to the fuse,
starting switch, or battery relay.

OUTLINE OF HYDRAULIC SYSTEM

● During operation and immediately after operation is ended,
the temperature of the hydraulic system still remains high.
In addition, high hydraulic pressure is applied to the system.
Take care when inspecting and maintaining the hydraulic sys-
tem.
Stop the machine on level ground, lower the bucket to the
❍
ground, then set so that there is no pressure applied to
the cylinder circuit.
Always stop the engine.
❍
Immediately after operations, the hydraulic oil and lubri-
❍
cating oil are at high temperature and high pressure, so
wait for the oil temperature to go down before starting
maintenance. Even when the temperature goes down,
the circuit may still be under internal pressure, so when
loosening the plug or screw, or the hose joint, do not
stand in front of the part. Loosen it slowly to release the
internal pressure before removing it.
When carrying out inspection or maintenance of the
❍
hydraulic circuit, always bleed the air from the hydraulic
tank to remove the internal pressure.
Periodic maintenance includes the inspection of the hydraulic
●
oil level, replacement of the filter and refilling of hydraulic oil.
When a high pressure hose, etc. is removed, check the O-
●
ring for damage. If necessary, replace it.
After the hydraulic filter element and strainer are cleaned or
●
replaced, or after the hydraulic system is repaired or replaced
or the hydraulic piping is removed, bleed air from the hydrau-
lic circuit.
PW160-7H VEAM390100
OUTLINE OF SERVICE
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