Installation With Coupling - Bosch Rexroth 3 Series Instruction Manual

• Torsional vibrations and speed variations may cause leakages on the shaft seal and
increased rotary angular 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 their pre-charge
pressure after just a short operating time.
An automatic clamping device can lessen the speed variations and vibrations and
thus avoid subsequential damage.
– When using drives with toothed belts or V-belts, always use an automatic
clamping device.
• On the drive of an axial piston unit, a cardan shaft may cause vibrations and
impermissible rotary angular 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 operational conditions, particularly at cold start. If this is not possible,
separate drain lines must be laid, if necessary. (Please refer to chapter 8).
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
• with cardan shaft

7.4.4 Installation with coupling

The following describes how to install the axial piston unit with a coupling:
nOTICE! Danger from improper handling!
Product can get damaged!
▶ Do not install the coupling hub onto the drive shaft of the axial piston unit by
striking it.
1. Install the specified coupling half onto the drive shaft of the axial piston unit
according to the instructions of the coupling manufacturer.
The drive shaft of the axial piston unit is equipped with a female thread. Use this
female thread to pull the coupling element onto the drive shaft. The size of the
female thread can be seen in the installation drawing.
2.
Clamp the coupling hub onto the drive shaft or ensure permanent lubrication
of the drive shaft. This prevents the formation of frictional corrosion and the
associated wear.
3. Transport the axial piston unit to the installation location.
4. Remove dirt and foreign particles from the installation location.
5.
Install the coupling on the output shaft of the machine in accordance with the
specifications provided by the coupling manufacturer.
RE 92105-01-B/06.2017, A4CSG, Series 3x, Bosch Rexroth AG
Installation 33/68