10
BA551501-en
2
Description
2.1
Design and Operating Principle
These pit jacks are based on the synchronous principle of all telescopic stages.
These hand-hydraulic, hydraulic/pneumatic combined or pneumatic pit jacks /
axle and transmission jacks are lifting devices for lifting vehicles and
component units. The pit jack can be moved longitudinally and transversely via
a carriage, the axle and gear jack via a floor-running carriage with rollers.
The pump block contains load, suction and overload valves. The low pressure
foot pump is mounted according to the spare parts list. The self-closing
lowering screw is also mounted on the pump block. An overflow system is
installed for automatic bleeding.
An attached support disk (bracket/gear plate) serves as the load carrying
device. For special lifting points on vehicles, other suitable supports from our
range of accessories can be fitted.
In the case of hydraulic-pneumatic pit jacks with rapid control, the oil in the tank
is pressurised by compressed air. This displaces the oil and the piston quickly
reaches the lifting point.
In the version with air motor (LM), this unit is located on the right-hand side (the
high-pressure side). It is driven by compressed air and transports the oil.
H carriages
are mounted in a suspended position.
X carriages
can be moved freely and are used in pits as well as under vehicle
lifts for raising and lowering units. In the case of type
X
, the jack is permanently
mounted on the carriage.
F / U / Z carriages
are designed exclusively for use in pits. The carriage is held
in its fixed track by flanged or deflector rollers. In addition, the jack can be
moved in the carriage at right angles to the pit.
The rollers run directly on the floor or on rails or in steel profiles. The running
surface must be even, firm and clean. The ground slope must not exceed 2%.
2.2
Compressed Air Supply
NOTE
Connect pneumatically actuated jacks to a suitable compressed air supply.
They may only be operated with dry, lubricated compressed air according to
ISO 8573-1:2010 [1:4:2].
