Bosch Rexroth 3 Series - Page 61

Troubleshooting 61/68
RE 92105-01-B/06.2017, A4CSG, Series 3x, Bosch Rexroth AG
Table 14: Axial piston unit malfunction table
Malfunction Possible cause Remedy
No or insufficient flow Insufficient air bleeding of the hydraulic system Fill the axial piston unit, suction line for the
hydraulic pump and the reservoir
Completely air bleed the axial piston unit and
hydraulic system
Faulty mechanical drive (for example, defective
coupling)
Contact machine/system manufacturer
Drive speed too low Contact machine/system manufacturer
Insufficient suction conditions, e.g. insufficient
dimensioning of the suction line, viscosity of
the hydraulic fluid too high, suction height too
high, suction pressure too low, foreign particles
in the suction line, suction filter too small or
blocked
Machine/system manufacturer: check the
system, for example, optimize inlet conditions,
use suitable hydraulic fluid
Fill the suction line with hydraulic fluid
Remove foreign particles from the suction line
Check the filter system and change the filter as
necessary
Hydraulic fluid not in optimum viscosity range Machine/system manufacturer:
check temperature range and use suitable
hydraulic fluid
Insufficient boost pressure Check boost pressure
Contact Bosch Rexroth Service
Insufficient pilot pressure or control pressure Check pilot pressure or control pressure
Contact Bosch Rexroth Service
Malfunction of the control device or controller
of the axial piston unit
Contact Bosch Rexroth Service
Control of the control device defective Check control (contact machine/system
manufacturer or Bosch Rexroth Service)
Wear or mechanical damage to the axial piston
unit
Replace axial piston unit
Contact Bosch Rexroth Service