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Maintenance and repair
Bosch Rexroth AG
, A4VG Series 32, RE 92003-01-B/12.2015
10.2 Inspection
In order for the axial piston unit to be reliable and long-lasting, Bosch Rexroth
recommends testing the hydraulic system and axial piston unit on a regular basis,
and documenting and archiving the following operating conditions:
Table 12: Inspection schedule
Task to be performed
Interval
Hydraulic
system
Check level of hydraulic fluid in the reservoir.
Daily
Check the operating temperature under comparable load
condition at the drain port and in the reservoir.
Weekly
Conduct analysis of hydraulic fluid: Viscosity, aging
and contamination
Yearly or every
2000 operating
hours (whichever
occurs first)
Axial piston unit Check axial piston unit for leakage.
Early detection of hydraulic fluid loss can help to find
faults on the machine/system and to rectify them. For this
reason, Bosch Rexroth recommends that the axial piston
unit and system are always kept in a clean condition.
Daily
Check axial piston unit for unusual noise development.
Daily
Check fasteners for firm seating.
All fasteners have to be checked when the hydraulic
system is switched off, depressurized and cooled down.
Monthly
Change the filter element in optionally mounted filters
The change interval may vary depending on the degree
of contamination of the hydraulic fluid. We recommend
using a contamination indicator.
Half-yearly or every
500 operating
hours (whichever
occurs first)
10.3 Maintenance
The axial piston unit is low-maintenance when used properly.
The service life of the axial piston unit is heavily dependent on the quality of the
hydraulic fluid. For this reason, we recommend changing the hydraulic fluid at least
once per year or every 2000 operating hours (which ever occurs first) or having
it analyzed by the hydraulic fluid manufacturer or a laboratory to determine its
suitability for further use.
The service life of the axial piston unit is limited by the service life of the bearings used.
On the basis of the load cycle, you can ask the responsible Bosch Rexroth Service
partner about the service life, see Chapter 10.5 “Spare parts” on page 56 for
an address. Based on these details, a maintenance period is to be determined by
the system manufacturer for the replacement of the bearings and included in the
maintenance schedule of the hydraulic system.
