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Maintenance and repair
Bosch Rexroth Corporation
, A21VG Series 10, RE 93223-01-B/09.2020
10.2 Inspection
In order to enable long and reliable operation of the axial piston unit, 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 carried out
Interval
Hydraulic
system
Check level of hydraulic fluid in the reservoir.
Daily
Check the operating temperature at a comparable load
condition at the reservoir port and in the reservoir.
Weekly
Conduct analysis of hydraulic fluid: viscosity, aging and
dirt 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 fastener elements for tight seating.
All fasteners have to be checked when the hydraulic
system is switched off, depressurized and cooled down.
Monthly
10.3 Maintenance
The axial piston unit is low-maintenance when used as intended.
The service life of the axial piston unit is heavily dependent on the quality
of the hydraulic fluid. This is why we recommend changing the hydraulic
fluid at least once per year or every 2000 operating hours (whichever 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 to the service life of the bearings
used. You can ask your local contact person about service life based on load cycle.
You can find their contact information at
www.boschrexroth-us.com/contactus
Based on these details, a maintenance interval should be determined by the
system manufacturer for the replacement of the bearings and included in the
maintenance schedule of the hydraulic system
