39
Chapter XII Troubleshooting
Section I General
To ensure stable performance of your SDTW excavator, it is essential that the machine’s components and parts
are properly maintained. The machine’s performance and service life are determined not only by the
manufacturing and assembling quality, but also maintenance quality.
Preventative maintenance is the easiest and most economical method to maintain your excavator. .
There are daily inspection requirements and long-, medium- and short-term maintenance requirements according
to maintenance frequency, that are needed to be adhered to.
Failure to follow these operating instructions and regularly maintain the excavator in accordance with these
instructions will void the warranty.
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 so 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 coupling
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.
Summary of Contents for TW08 MINI
Page 4: ...4 Quick hitch Narrow bucket Log grab Mechanical thumb Auger Ripper Rake...
Page 5: ...5 Section II Main parameters...
Page 11: ...11 Hydraulic system structure of SDTW 0 8T excavators I Rotary motor...
Page 12: ...12...
Page 15: ...15...
