RE91405-01-B/2021-05-21, BoschRexrothAG
Installation | A2FO series 70 29/52
7�4�3 General instructions
Follow these general notices when installing the axial piston unit:
• Torsional vibrations and speed variations may cause increased rotary angular
acceleration of the rotary group of the axial piston unit. At risk are diesel drives
with asmall number of cylinders and low flywheel mass and toothed belt or
V-belt drives. Belts can lose much of their pre-charge pressure after just ashort
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, acardan shaft may cause vibrations
and excessive rotary angular acceleration. Depending on the frequency and
temperature, this may cause leaks in the shaft seal and damage the rotary group.
• If ashared drain line is used for several units, make sure that the respective case
pressure in each unit 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 condition, particularly at cold start. If this is not
possible, separate drain line must be laid, if necessary.
The version of installation 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 acoupling
• On agearbox
• On acardan shaft
7�4�4 Installation with acoupling
The following describes how to install the axial piston unit with acoupling:
NOTICE! Danger from improper handling!
Product can be damaged!
▶ Do not install the coupling hub on the drive shaft of the axial piston unit by
striking it.
1� Install the specified coupling half on 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 afemale 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.
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