Page 52 - BPW axles with air suspension Series O SL AL

BPW axles with air suspension

11.1 BPW Air Suspension Levelling Valve

BPW air suspension axles are prepared for use with
a levelling valve. This regulates the air bag pressure
Frame attachment according to the respective load, thereby holding
the vehicle at a constant level.
min. 200
The levelling valve is fixed to the vehicle frame and
connected to the axle via pushrods.
The pushrods are activated at the centre of the axle.
a EF > 0°
With tri-axle suspensions they are fitted to the cen-
tre axle and with tandem-axle suspensions to the
rear axle.
Deflection rod
Valve lever Ride height Under special circumstances (e.g. axle lift device or
a < 90°
extreme vehicle inclinations), the levelling valve can
Compression stroke The valve lever, which is at least 200 mm long, is
also be linked to the front or rear axle.

a AF < 180°
EF positioned horizontally in the direction of travel. For
Deflection joint testing purposes, the lever is pressed slightly
downwards to ensure that air is released into the
atmosphere via the pressure relieve valve. If the air
Extension stroke positioned. The ride height is set by carrying out
AF is directed into the air bag, the valve shaft must be
rotated by 180°. The valve lever must then be re-
adjustments to the rubber joints of the pushrod and
by adjusting the locking nuts. All adjustments, either
on an empty or fully laden vehicle, must be carried
out when the vehicle is standing on level ground.

DIRECTION OF TRAVEL

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The air suspension can be checked by activating
the compression stroke to the air bag bump stop,
and then the extension stroke to its limits (shock
absorber, catch straps, air bag length).

The stipulated angles must be conformed to. Other-
wise the valve pushrod could reverse its direction.

52 BPW-EA-Luft 1023701e