Komatsu PC58UU-3, Руководство по ремонту

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PC58UU-3
20-205
TROUBLESHOOTING
(3) Disconnections in wiring
If the wiring is held and the connectors are
pulled apart, or components are lifted with a
crane with the wiring still connected, or a
heavy object hits the wiring, the crimping of
the connector may separate, or the soldering
may be damaged, or the wiring may be bro-
ken.
(4) High-pressure water entering connector
The connector is designed to make it difficult
for water to enter (drip-proof structure), but if
high-pressure water is sprayed directly on
the connector, water may enter the connec-
tor, depending on the direction of the water
jet.
As already said, the connector is designed to
prevent water from entering, but at the same
time, if water does enter, it is difficult for it to
be drained. Therefore, if water should get
into the connector, the pins will be short-cir-
cuited by the water, so if any water gets in,
immediately dry the connector or take other
appropriate action before passing electricity
through it.
(5) Oil or dirt stuck to connector
If oil or grease are stuck to the connector and
an oil film is formed on the mating surface be-
tween the male and female pins, the oil will
not let the electricity pass, so there will be de-
fective contact.
If there is oil or grease stuck to the connector,
wipe it off with a dry cloth or blow it dry with
compressed air and spray it with a contact re-
storer.
When wiping the mating portion of the
connector, be careful not to use exces-
sive force or deform the pins.
If there is oil or water in the compressed
air, the contacts will become even dirtier,
so remove the oil and water from the
compressed air completely before clean-
ing with compressed air.
POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE
(6)