Malfunction Table - Bosch Rexroth A10VER 52 Series Instruction Manual

Table 13: Axial piston unit malfunction table
Fault
Unusual noises
Increased, unusual vibration
Reversing not possible
No or insufficient pressure
Pressure/flow fluctuations or
instabilities

14.2 Malfunction table

Possible cause
Insufficient air bleeding of the hydraulic system
Output speed too high
Improper mounting of the axial piston unit
Improper mounting of attachments, hydraulic
lines or improper installation of the coupling
Mechanical damage to the axial piston unit
(e.g., bearing damage).
Bearings worn
Hydraulic fluid too viscous
Time-delay orifice clogged
Defective solenoid, connector or lines
Insufficient air bleeding of the hydraulic system
Faulty mechanical output drive (e.g., defective
coupling)
Drive power too low
Malfunction in the axial piston unit control
device or controller
Control of the control device defective
Wear or mechanical damage to the axial
piston unit
Drive unit defective (e.g., hydraulic pump)
Insufficient air bleeding of the hydraulic system
Unstable control signal
Malfunction in the control devices or the
controller.
Remedy
Fill axial piston unit, suction line for the
hydraulic pump and the reservoir
Completely air bleed axial piston unit and
hydraulic system
Check correct installation position
Machine/system manufacturer: reduce
output speed
Check the mounting of the axial piston unit
according to the specifications of the machine/
system manufacturer (observe tightening
torques)
Mount attachments according to the
information provided by the coupling or fitting
manufacturer
Replace axial piston unit
Contact Bosch Rexroth Service
Contact Bosch Rexroth Service
Check hydraulic fluid temperature on the high-
pressure side
Repeat reversing process (contact machine/
system manufacturer or Bosch Rexroth Service)
Make sure the solenoid/plug is properly
connected. Make sure the electrical control
functions properly.
Fill axial piston unit, suction line for the
hydraulic pump and the reservoir
Check correct installation position
Contact machine/system manufacturer
Contact machine/system manufacturer
Contact Bosch Rexroth Service
Check control (contact machine/system
manufacturer or Bosch Rexroth Service)
Replace axial piston unit
Contact Bosch Rexroth Service
Contact machine/system manufacturer
Fill axial piston unit, suction line for the
hydraulic pump and the reservoir
Completely air bleed axial piston unit and
hydraulic system
Check correct installation position
Contact machine/system manufacturer or
Bosch Rexroth Service
Contact Bosch Rexroth Service
RE 91706-01-B/09.2015, A10VER Series 52, Bosch Rexroth AG
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