Page 39 - BPW axles with air suspension Series O SL AL

Over-slung Version (trailing arms above axle)
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1. Insert the axle with the hub flanges into the
fixture. All contact surfaces on the axle beam
and axle connection must be clean and free
from weld spatter.
2. Place the spring pads in the correct position
on the square centring frame of the axle
beam.
3. Mount trailing arms - including catch plate
for single-leaf springs - on the spring eye
with pin ∅ 30 (∅ 24 for Airlight II air sus-
pension units from build year 9/2007 on-
wards).
4. Mounting without tracking plate (only with
single-leaf spring for centring pin):
Insert the centring pin into the trailing arm /
catch plate hole.
4.1 Mounting with tracking plate:
(with single-layer trailing arm for centring pin): familiar M 24 spring U-bolt (36 mm).
Insert tracking plate 05.281.... with mounted
centring pin into the trailing arm / catch plate This Airlight II axle connection with spring U-bolt
hole.
4.2 With single and double-leaf trailing arms with
spring bolt: Insert tracking plate 03.281.... into strength. This has the advantage that the Airlight
the spring pads.
5. Insert trailing arms (with the centring pin or
tracking plate) into the spring pads.
6. Mount the spring U-bolt and segments.
7. Fit the spring plates.
8. Grease the spring U-bolt thread, fit washers
and screw the lock nuts onto the spring
U- bolts by hand.
9. Use a driver to tighten the lock nuts slightly - please refer to the applicable maintenance regula-
always one spring U-bolt at a time - until all
components make even contact. (The spring
pads only make contact at the radii of the
axle beam.) There must be no uneven
tensioning due to one-sided tightening of
the lock nuts.
10. Use a driver to tighten the lock nuts slightly -
always one spring U-bolt at a time - until all
components make even contact. (The spring
pads only make contact at the radii of the
axle beam.) There must be no uneven
tensioning due to one-sided tightening of the
lock nuts.Otherwise, the connection must be
corrected by loosening and retightening the
spring U-bolts. Now the hanger brackets
and shock absorbers can be mounted.
BPW-EA-Luft 1023701e
7.3.1
Tightening torques, see last page.
When mounting the spring without the fixture,
the permitted tolerances of the spring eye
centre, spring eye height, spring length and
rectangular alignment must be measured.
11. When mounting with a tracking plate,
illustration 4.1 / 4.2:
Weld the tracking plates onto the rear end
of the spring pads after installation and
alignment of the air suspension axles on
the vehicle. Weld a 4 x 80.
R Reemmaarrkkss::
With the introduction of the Airlight II air suspen-
sion, a second spring U-bolt with M 22 (32 mm)
was launched onto the market in addition to the
diameter M 22 (32 mm) is tightened with a torque
and angle process controlled by the tensile yield
II air suspension is maintenance-free in on-road
applications.
In all other air suspension types and in Airlight II
air suspension systems used off-road, the U-bolt
connections must be checked regularly and re-
tightened if necessary because of the high
loadings.
This involves checking the U-bolt connection is
firmly tightened at the specified intervals. For
more information about the maintenance intervals,
tions or workshop manuals.
The specified tightening torques are mandatory in
order to prevent damage to the components.
I Immppoorrttaanntt ffoorr aallll wweellddiinngg wwoorrkk!!
The trailing arms, air bags and plastic pipes
must be protected against flying sparks and
weld spatter during all welding work. The earth
terminal must never be attached to the trailing
arm or the hub. Do not perform any welding on
the trailing arms!
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