Malfunctions Axial Piston Unit - Bosch Rexroth Sytronix FcP 50 Series Operating Instructions Manual

DOK-SYTROX-MPES2******-IT01-EN-P
Rexroth Sytronix FcP 50xx/70xx Motor-Pump Unit MPES2
13.3

Malfunctions axial piston unit

Malfunction Possible cause
Remarkable noises Input speed too high.
Wrong direction of rotation.
Unsufficient suction behavior, e.g. air in the suc‐
tio port, unsufficient diameter of the suction port,
too high viscosity of the hydraulic fluid, too high
suction height, too low suction pressure, foreign
bodies in the suction port.
Improper fastening of the axial piston unit.
Improper fastening of mounted parts, e.g. cou‐
pling or hydraulic lines.
Pressure limitation valve of the axial piston unit
Mechanical damage of axial piston unit (e.g.
damaged bearings).
No or too less volume Defective mechanical drive (e.g. defective cou‐
flow rate pling).
Input speed too low.
Unsufficient suction behavior, e.g. air in the suc‐
tio port, unsufficient diameter of the suction port,
too high viscosity of the hydraulic fluid, too high
suction height, too low suction pressure, foreign
bodies in the suction port.
Hydraulic fluid not in optimum viscosity range.
External control of the adjusting device defec‐
tive.
To low control pressure or set pressure.
Malfunction of adjusting device or of the control‐
ler of the axial piston unit.
Wear of axial piston unit.
Mechanical damage of axial piston unit.
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Bosch Rexroth AG
Remedy
Machine or system manufacturer.
Please observe correct direction of rotation.
Machine- or system manufacturer (e.g. optimize
intake relations, use suitable hydraulic fluid).
Completely bleed the axial piston unit, fill the
suction port with hydraulic fluid.
Remove foreign bodies in the suction port.
Check the fastening of the axial piston unit ac‐
cording to the specifications of the machine- or
system manufacturer. Observe the tightening
torques.
Fasten the attachment parts according to the
specifications of the coupling or fittings manu‐
facturer.
Contact Bosch Rexroth service.
Change axial piston unit and contact Bosch
Rexroth service.
Machine or system manufacturer.
Machine or system manufacturer.
Machine- or system manufacturer (e.g. optimize
intake relations, use suitable hydraulic fluid).
Completely bleed the axial piston unit, fill the
suction port with hydraulic fluid.
Remove foreign bodies in the suction port.
Use suitable hydraulic fluids (machine- or sys‐
tem manufacturer).
Check external control unit (machine- or system
manufacturer).
Check control pressure or set pressure and
contact Bosch Rexroth service.
Contact Bosch Rexroth service.
Change axial piston unit and contact Bosch
Rexroth service.
Change axial piston unit and contact Bosch
Rexroth service.
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Troubleshooting