OPERATION & MAINTENANCE MANUAL SWE18UF
108
Slewing platform don’t slew,
slew slowly, or slew not
smoothly.
1． Corresponding pilot valve
malfunction
2． Hydraulic motor malfunction
3． Slewing retarder malfunction
4． Slewing bearing malfunction
5． Need to add lubricant grease into
the slewing bearing.
1． Repair
2． Consult with your dealer
3． Consult with your dealer
4． Repair
5． Add lubricant grease
Track of one side doesn’t
work or move very slowly
(serious deflection of
traveling)
1．Control pilot valve malfunction
2．Corresponding reversing valve
and stop valve malfunction
3．Center connector seal damage
4．Hydraulic motor malfunction
5．Travel redactor fault
6．The displacement of duplex
hydraulic pump is not equal
1．Repair
2．Consult with the dealer
3．Consult with the dealer
4．Consult with the dealer
5．Consult with the dealer
6．Consult with the dealer
The hydraulic oil temperature
rises too fast or becomes too
high
1．There is dirt on the surface of oil
cooler.
2．Wear of hydraulic parts and
reduction of the cubage
efficiency.
3．Overflow valve and over load
valve opens too frequently
1．Clean
2．Contact the dealer
3．Over digging, over loading,
change the digging method.
Some unexpected actions
occur without operating the
handle
1． Pilot valve lever block.
2．Pilot valve spool block.
1． Contact the dealer
2． Contact the dealer
Mandril leak at the top of
pilot valve
Seal ring of the pilot valve mandril
piston trepan boring aging or damage
“Nodding” condition of the
work device
Usually caused by the block of
multi-way valve lever’s check valve
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