80/104 Maintenance and repair
Bosch Rexroth AG
, A4... with HS5E pilot control valve/Series 3x, RE 92076-01-B/10.2017
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 23: 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)
Check filter:
Depending on the degree of contamination of the
hydraulic fluid,
the replacement interval can vary. We recommend
using a contamination indicator
Yearly or every 1000
operating hours
(whichever comes
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 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 fastening 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. For this reason, 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 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 81
for an address. Based on these details, a maintenance interval is to be determined
by the system manufacturer for the replacement of the bearings and included in the
maintenance schedule of the hydraulic system.
