BPW ECO Tronic EBS Operating And Installation Instructions page 67

5.2.1 Standard air suspension valve
Assembly instructions - Pneumatic
In the case of the valves with push-on connections, 8 x 1 plastic
tubes according with DIN 74 324 are to be used as pneumatic
lines. Care must be taken during assembly that the tubes are
cut off at right angles and burr-free for the required length.
Before the tubes are inserted into the push-on connections,
support sleeves must be pressed into the ends of the tubes.
Insert the tube at least 22 mm into the push-on connectors. By
pressing down on the over-hanging lock ring (e.g. with an open
end spanner), the plastic tube can be removed again (e.g. in
case of replacement).
When painting is being undertaken, all open connections and
the breather must be protected against paint penetrating inside
by using suitable means. The protective measures must be
removed again once the painting work has been completed.
A tubing fi lter is to be inserted into the line coming from the air
tank (prevents soiling occurring).
Setting the valve
After installation of the valve and connecting the pipe fi ttings
the length of the connecting rod must be determined between
axle and valve, after the vehicle chassis has been set at the
desired height (vehicle manufacturer- specifi cation). The raising
of the frame or chassis to this desired height is reached by lifting
the control lever in position "charging". At this process the air
bellows are infl ated with air.
At reaching the desired height the control lever must be
positioned immediately in the lap position, which can be the
horizontal position (depend to version), and fi x it with a locking
pin (d=4h8) on housing and on bore of the spindle. Statutorily
prescribed max. heights must be adhered to. Please see the
BPW documentation for air suspension systems for further
information.
The actual length of the connecting rod between the linkage to
axle and the linkage at the control lever can now be determined,
and the connecting rod can be fastened. The connecting rod is
to be connected using the rubber linkages and fastened with
the hose clamps supplied.
Last of all remove the locking pin.
If a problem-free fi nishing position still cannot be achieved with
the control level in this position, then it is possible to effect a
corresponding correction:
To lock the lap position, use pin d = 4h8 x 20 DIN 7 fi x spindle
as well as linkage (d = 6 mm) in horizontal position. Remove
the rubber boot and fi lter pad. With a screwdriver turn the
valve tappet so far, that neither a rise nor drop in pressure
occurs. As an alternative an adjustment at the linkage to axle is
possible: loosen counter nut and shift angles at the axle bracket
accordingly. Tighten counter nut again.
Inspection
Check function and leak.
In the lap position at the delivery ports 21, 22 neither rise of
pressure nor drop of pressure may result. Free movement
and condition of the linkage is to be checked, bent or welded
linkages are to be exchanged. Brittle or hardened rubber pieces
are to be renewed.
5.2 Air suspension
Pipe connection
Assembly plastic pipe
Dismantling plastic pipe
1. Press in clamp ring
Fig. 119
Zero point adjustment
Fig. 120
2. Remove plastic
pipe
Zero point adjustment
of the valve by means
of the dowel pin 4 x 20
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