SUNWARD SWE150F, Operation & Maintenance Manual

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184
Hydraulic system
Problem Cause remedy
Hydraulic function
becomes sluggish
Low hydraulic oil level
Low hydraulic oil temperature
Oil type do not match
ambient temperature
Low engine revs
Main pump wear out
Pilot oil circuit malfunction
Main suction oil pump
blocked Add hydraulic oil until specified scale level is
reached
Warm up operation until hydraulic temperature
reaches around 50 . ℃
Use proper oil
Adjust engine revs or contact distributor
Contact distributor
Contact distributor
Contact distributor
Excessive hydraulic
oil temperature
Improper oil
Low hydraulic oil level
Hydraulic oil polluted
Radiator clogging
Filter clogging
pump suction pipe leakage
main pump wear out
safety valve
improper adjustment on
hydraulic element Use proper hydraulic oil
Add hydraulic oil to reach specified scale level
Filter or drain out and refill with proper oil
Clean radiator and front drainer
Clean or replace filter
Contact distributor
Contact distributor
Contact distributor
Contact distributor
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 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 distributor
Contact distributor
Clean or replace oil suction filter
Check oil suction piping
Replace piston ring or contact distributor