Bosch Rexroth A4VG 35 Series - Inspection; Maintenance

Maintenance and repair 51/64
RE92035-01-B/2019-11-25, A4VG Series35, Bosch Rexroth AG
10.2 Inspection
In order for the axial piston unit to be reliable and long-lasting, BoschRexroth
recommends inspecting the hydraulic system and axial piston unit on a regular basis,
and documenting and archiving the following operating conditions:
Table 12: Inspection schedule
Tasks to be performed Interval
Hydraulic system Check hydraulic fluid level in the reservoir. Daily
Check the operating temperature under comparable load
condition at the drain portand in the reservoir.
Weekly
Perform hydraulic fluid analysis: 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
fault
s on the machine/system and rectify them. This is
why BoschRexroth recommends always keeping the
axial piston unit and system clean.
Daily
Check axial piston unit for unusual noise development. Daily
Check mounting elements for tight seating.
All fasteners have to be checked when the hydraulic
sy
stem 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.com/addresses
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.