SUNWARD SWE215F-5 - Page 169

OPERATION & MAINTENANCE MANUAL SWE215F
162
Hydraulic oil
produces bubble
Suction piping leakage
Piping twist or depressed
mix water into oil
improper oil
improper oil volume, too high
or too low
Contact with distributor
Check hydraulic piping
Drain out and refill with proper hydraulic oil
Drain out and refill with proper hydraulic oil
Keep hydraulic oil within specified level range
Hydraulic cylinder
acts but cant not lift
loads
Main pump wear out
Main safety valve low
pressure
Suction filter clogging
Pump suction pipe leakage
Hydraulic cylinder wear out
and cause internal leaks
Contact with distributor
Contact with distributor
Clean or replace oil suction filter
Check oil suction piping
Replace piston ring or contact with distributor
Other
Problem
Cause
Remedy
Platform cannot
slew or act slowly
or unstably
Defective control pilot valve
Swing motor defective
Defective swing reduction
gear
Defective swing bearing
Improper lubrication of swing
bearing
Contact with our designated distributor
Contact with our designated distributor
Contact with our designated distributor
Contact with our designated distributor
Greasing it
Travel abnormally
Track over stretched or too
loose
Insufficient lubrication of
idler or track roller
Get stuck by stones
Defective brake
Defective pilot valve
adjust
lubricate
remove and clear
repair, replace or contact with our distributor
repair, replace or contact with our distributor
One side track does
not move or moves
slowly( off-track)
Controlled pilot valve
malfunction
Corresponding steering valve
and brake valve malfunction
Central joint oil-seal damaged
Hydraulic motor malfunction
Travel redactor malfunction
Displacements differ with
double hydraulic pump
repair
Contact with distributor
Contact with distributor
Contact with distributor
Contact with distributor
Contact with distributor