SHANDONG CARTER HEAVY INDUSTRY MACHINERY CO., LTD.
78
6 Troubleshooting
6.1 General
To ensure excellent performance of Carter 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.
6.2 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
6.3 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
Change
plate, elastic plate)
The main pump is damaged
Change or repair the main pump
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 servo system pressure is low or zero
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.
The safety valve is set at low pressure or
stuck.
Oil suction pipe of main pump explodes or
comes off
Change with a new one
To Next Page
Loading...