38/68 Installation
Bosch Rexroth AG
, A4VG Series 32, RE 92003-01-B/12.2015
7.4.2 Dimensions
The installation drawing contains the dimensions for all connections and ports on
the axial piston unit. Also observe the manuals provided by the manufacturers of the
other hydraulic components when selecting the required tools.
7.4.3 General instructions
Follow these general instructions when installing the axial piston unit:
•
Note that you can expect certain installation positions to affect the control
device. Gravity, dead weight and case pressure can cause minor shifts in control
characteristic curves and changes in response time.
•
Torsional vibrations and speed variations may cause leakages on the shaft seal and
increased rotary angle accelerations of the rotary group of the axial piston unit. At
risk are diesel drives with a small number of cylinders and low flywheel mass and
toothed belt or V-belt drives. Belts can lose a large part of its tension after just a
short time.
An automatic tensioning device can lessen the speed variations and vibrations and
thus avoid consequential damage.
– When using toothed belts or v-belts to transfer the input or output drive, always
use an automatic tensioning device.
•
On the input or output drive of an axial piston unit, a cardan shaft may cause
vibrations and impermissible rotary angle accelerations. Depending on the
frequency and temperature, they may result in leakage on the shaft seal and
damage to the rotary group.
•
If a shared drain line is used for several units, make sure that the respective case
pressure is not exceeded. The shared drain line must be dimensioned to ensure
that the maximum permissible case pressure of all connected units is not exceeded
in any operating conditions, particularly at cold start. If this is not possible,
separate drain lines must be laid if necessary.
The type of installation to be used for the axial piston unit depends on the
connecting elements to the drive side. The following descriptions explain the
installation of the axial piston unit:
•
with a coupling
•
on a gearbox
