Parker D41FE, Operation Manual, Page: 19 / 20

Pilot Operated Proportional DC Valve
Series D*1FE
Operation Manual
19 Parker Hannifin Corporation
D_1FE 5715-688 UK CM 18.01.2019
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.
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
Hotline in Europe
Phone: 00800-2727-5374
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
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
- poor dynamic
possible reasons for malfunction
corrective actions
X hydraulic pump resp. motor defective replace hydraulic pump resp. motor
X X X X X X X drive overloaded reduce pressure resp. speed, increase valve size
X X X X X X X X valve contaminated clean pressure fluid, filter / flush valve
X X X hydraulic fluid too viscous / too cold change fluid grade, provide operational temperature
X X X too low oil level within tank refill pressure fluid
X X X filter contaminated replace filter
X X X X supply voltage too low keep supply voltage range
X supply voltage carries too much ripple reduce ripple
X X X command signal too low increase command signal
X command signal carries too much ripple reduce ripple
X X center position adjustment incorrect check center position adjustment
X X X X X contacts of central connector contaminated clean contacts / replace plug
X feed cable interrupted fix feed cable
X X X X X X X wiring sequence incorrect correct wiring sequence
X X feed cable without shielding change cable grade
X pilot pressure too low or failed increase pilot pressure to min. 20 bar
X X X pilot pressure too low increase pilot pressure to min. 20 bar
X pilot pressure too low increase pilot pressure to min. 50 bar
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.