Komatsu PC200LL-8 Shop Manual page 25

Hydraulic excavator
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FOREWORD
E. Drying wiring harness
If there is any oil or dirt on the wiring harness, wipe it off
with a dry cloth. Avoid washing it in water or using steam.
If the connector must be washed in water, do not use
high-pressure water or steam directly on the wiring harness.
If water gets directly on the connector, do as follows.
Disconnect the connector and wipe off the water with a dry
cloth.
★ If the connector is blown dry with compressed air,
there is the risk that oil in the air may cause defective
contact, so remove all oil and water from the
compressed air before blowing with air.
Dry the inside of the connector with a dryer.
If water gets inside the connector, use a dryer to dry the
connector.
★ Hot air from the dryer can be used, but regulate the
time that the hot air is used in order not to make the
connector or related parts too hot, as this will cause
deformation or damage to the connector.
Perform a continuity test on the connector.
After drying, leave the wiring harness disconnected and
perform a continuity test to check for any short circuits
between pins caused by water.
★ After completely drying the connector, blow it with
contact restorer and reassemble.
5.
Handling controller
A. The controller contains a microcomputer and electronic control
circuits. These control all of the electronic circuits on the
machine, so be extremely careful when handling the controller.
B. Do not place objects on top of the controller.
C. Cover the control connectors with tape or a vinyl bag. Never
touch the connector contacts with your hand.
D. During rainy weather, do not leave the controller in a place
where it is exposed to rain.
PC200/220LL-8
HANDLING ELECTRIC EQUIPMENT AND HYDRAULIC COMPONENTS
00-13
b

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