Page 131 - Catalog spare parts BPW LUFT

Auto Parts / Page 130 BPW-EL-Luft 31051601e

10 BPW Axle lift devices

10.3 Two-sided axle lifts
10.3.4 Installation notes

Two-sided axle lift, installation notes

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General

The BPW two-sided axle lift is suitable for the following axles and

air suspension systems:

9 tonnes air-suspension axles for single and twin wheels
10 tonnes air-suspension axles with single wheels,
not however for axles with greater permitted axle loads or for steering axles
Air suspension systems with air bag types 30K, 30, 36K, 36 for spring defl ections up to 220 mm,
not however for long-travel air suspension systems with bag types 30-1, 36-1, 36-2, 36-5

The two-sided axle lift is fitted underneath the air suspension hanger brackets of the axle to be lifted.
Please bear in mind the following points when using them:
In air suspension systems with raising and lowering, the downward travel of the axles must be limited.
The travel limitation can take the form of an air suspension valve with integrated level restriction,
a separate shut-off valve or of catch straps.

The stroke limiting function must be set so that the axle lift cannot be overloaded at maximum lift.
The ride height of the air suspension must be set to a min. upward travel of 100 mm.
When the axle is lifted, the tyre damping results in a clearance of approx. 60 mm under the tyres.
Make sure there is adequate ground clearance below the axle lift, in particular in air suspension
systems with trailing arms located underneath to give a low vehicle height.
Make sure the right and left sides of one hanger bracket have a symmetrical setting of the sliding blocks.
After mounting the axle lift, check it functions correctly and that there is adequate clearance from the
adjacent components.
An air pressure of at least 6 Bar is required to lift the axle.
The permitted operating pressure is 8.5 Bar.
There is no need for a pressure control valve or a residual pressure holding feature.
Free cylinder venting through cross sections without throttle points in the valve installation
must be ensured in order to avoid impermissibly high pressure values.
Comply with the appropriate statutory regulations when retrofi tting an axle lift
(e.g. overload protection, German „BO-Kraftkreis“, etc.).

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