Chapter XII Troubleshooting
Section I General
To ensure excellent performance of Haihongexcavator, all components and parts are of high quality. Machine’s
performance and service life are determined not only by manufacturing quality and assembling quality, but also
maintenance quality.
The marketing representative and service engineer shall remind the user that preventive maintenance is the easiest
and most economical one among various ways of maintenance.
There are daily inspection and long-, medium- and short-term maintenance according to maintenance frequency.
Section II Troubleshooting of mechanism system
The loose fasteners make noise.
Noisy structural components
Aggravated abrasion between
Adjust the clearance to less
bucket and end face of bucket rod
Deformed spring and weakened
Bucket teeth have dropped
during operation
elasticity of bucket tooth pin
Unmatched bucket tooth pin and
Change the bucket tooth pin
1.
Tighten the crawler
2.
The guide wheel shall move
slowly in front on rugged road
The crawler has tangled up
The driving wheel moves fast in
Section III Troubleshooting of hydraulic system
The whole excavator
does not move
Low oil level of hydraulic oil tank that the
main pump sucks no oil
Change the filter and clean the
system
Engine coupling is damaged (such as plastic
plate, elastic plate)
Change or repair the main pump
The servo system pressure is low or zero
Adjust to regular pressure. If it fails
to increase the pressure of servo
overflow valve, disassemble to wash;
if the spring is fatigue, add a washer
or change the spring.
The safety valve is set at low pressure or
stuck.
Adjust to regular pressure. If it fails
to increase the pressure, disassemble
and wash. If the spring is fatigued,
ass a washer or change the spring.
Oil suction pipe of main pump explodes or
comes off
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