46
TROUBLESHOOTING
https://www.agrotkindustrial.com
/
Section I General
To ensure excellent performance of 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.
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 II Troubleshooting of mechanism
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.
