Page 75 - Catalog spare parts BPW LUFT

Auto Parts / Page 74 BPW-EL-Luft 31051601e

4 BPW Air bags

4.2 Conversion from steel piston to plastic piston (GFK)

Conversion from steel or alloy piston to plastic piston (GFK)
Air bag with steel or aluminium piston Air bag with glass fi bre-reinforced
O plastic piston

SL

AL

Types BPW 30 / 30 K / 36 and 36 K air bags with steel or aluminium pistons are no longer
available in some cases. Observe position of
upper and lower air
If replacement is required, change over to the air bag with glass fi bre-reinforced
plastic piston. bag attachment!
Dismantling: Assembly:
Admit as much air into the air bag as Screw threaded sleeve (1215) onto
possible through the air suspension the air bag to a tightening torque of
or rotary disc valve / switching valve. 130 Nm.
Support the vehicle safely so there is Place bottom base plate (1220) into
no risk of accident, e.g. place a suitable glass fi bre-reinforced plastic piston
spacer between the vehicle frame and (1210) and screw on loosely using
the trailing arm. locking screw (1222).

Vent the air bag. Align the top and bottom bag
attachment points in relation to
Remove the compressed air connection. one another and tighten locking
Unscrew top (1240) and bottom (1224) screw (1222) to a tightening torque
bag attachments and remove the air of 230 Nm
bag. (The air bag must not be twisted after
installation in the vehicle!)
Apply compressed air into the hole for
the air connection until the bag is Install the air bag into the vehicle,
completely unrolled. tighten the top and bottom attach-
ments to the corresponding tightening
Unscrew and remove locking screw torque.
(1222) and take off bottom washer Connect the air connections.

(1220). Check for leaks.

Unscrew and remove square bolt (1215) Apply air into the air bag, remove the
using an impact driver and remove support.
piston (1210) from the air bag.

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