Trouble Shooting; Accessories / Spare Parts; Accessories; Spare Parts - Parker D41FE Operation Manual

Operation Manual

6. Trouble Shooting

Basis of troubleshooting is always a systematic
approach.
For suspect of a sluggish spool the valve may
be flushed with clean pressure fluid.
malfunction at hydraulic load runtime
- generally no function
- high frequent oscillation
- low frequent oscillation
- one way operation only
- speed variations at unchanging command
- different speeds depending on travel direction
- speed too low
- drifting without command
X
X X X X X X X drive overloaded
X X X X X X X X valve contaminated
X X X hydraulic fluid too viscous / too cold
X X X
X X X
X X X X
X
X X X
X
X X
X X X X X
X
X X X X X X X
X X
X
X X X
X pilot pressure too low

7. Accessories / Spare Parts

Accessories

The following accessories are available for the valve
series DFplus pilot operated:
Bolt kit
D31FE ordering code BK385
D41FE ordering code BK320
D81/91FE ordering code BK360
D111FE ordering code BK386
Female connection
Code 0: 6+PE ordering code 5004072
Code 5: 11-PE ordering code 5004711
Code 7: 6-PE ordering code 5004072

Spare Parts

Seal kit NBR
D31FE ordering code SK-D31FE
D41FE ordering code SK-D41FE
D81FE ordering code SK-D81FE
D91FE ordering code SK-D91FE
D111FE ordering code SK-D111FE
D_1FE 5715-688 UK CM 18.01.2019
- poor dynamic
possible reasons for malfunction
hydraulic pump resp. motor defective
too low oil level within tank
filter contaminated
supply voltage too low
supply voltage carries too much ripple
command signal too low
command signal carries too much ripple
center position adjustment incorrect
contacts of central connector contaminated
feed cable interrupted
wiring sequence incorrect
feed cable without shielding
pilot pressure too low or failed
pilot pressure too low
Pilot Operated Proportional DC Valve
Series D*1FE
Troubleshooting in a hydraulic system requires
detailed knowledge about function and con-
struction of the system. Therefore the work
may exclusively be performed by qualified
personnel.
corrective actions
replace hydraulic pump resp. motor
reduce pressure resp. speed, increase valve size
clean pressure fluid, filter / flush valve
change fluid grade, provide operational temperature
refill pressure fluid
replace filter
keep supply voltage range
reduce ripple
increase command signal
reduce ripple
check center position adjustment
clean contacts / replace plug
fix feed cable
correct wiring sequence
change cable grade
increase pilot pressure to min. 20 bar
increase pilot pressure to min. 20 bar
increase pilot pressure to min. 50 bar
Please direct technical product enquiries to:
Parker Hannifin
Manufacturing Germany GmbH & Co. KG
Industrial Systems Division Europe
Gutenbergstr. 38
41564 Kaarst, Germany
Tel.: (+49) 181 99 44 43 0
E-mail: valvesisde@parker.com
Hotline in Europe
Phone: 00800-2727-5374
19 Parker Hannifin Corporation