RHINOCEROS XN08, Operation & Maintenance Manual

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Chapter XII Troubleshooting
Section I General
To ensure excellent performance of Rhinoceros excavator, 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
Symptom Possible causes How to solve
Noisy structural components
1. The loose fasteners make noise.
2. Aggravated
abrasion between
bucket and end face of bucket rod
1. Inspect and tighten
2. Adjust the clearance to less
than 1mm
Bucket teeth have dropped
during operation
1. Deformed spring and weakened
elasticity of bucket tooth pin
2. Unmatched bucket tooth pin and
seat
Change the bucket tooth pin
The crawler has tangled up
1. Loose crawler
2. The driving wheel moves fast in
front on rugged road.
1. Tighten the crawler
2. The guide wheel shall move
slowly in front on rugged road
Section III Troubleshooting of hydraulic system
Symptom Possible causes How to solve
The whole excavator
does not move
Low oil level of hydraulic oil tank that the
main pump sucks no oil
Add enough hydraulic oil
Oil filter is blocked
Change the filter and clean the
system
Engine coupling is damaged (such as plastic
plate, elastic plate)
Change
The main pump is damaged 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
Change with a new one