Page 112 - Catalog spare parts BPW LUFT

Auto Parts / BPW-EL-Luft 31051601e Page 111

BPW Hanger brackets 7

Spare parts for hanger brackets, integrated supports, frames 7.2
Changing the weld-in bushes (spring bolt assembly) in BPW hanger brackets 7.2.1

Changing the weld-in bushes (spring bolt assembly) in BPW air suspension hanger
brackets for 70 mm wide trailing arms and loose wear plates
Perform the following work if the mounting bushes are worn out:

1. Remove the worn-out bushes from the side plates
2. Insert new bushes and use spacer sleeve* (82.5) or trailing arm bush (72+0.5)
plus mounted wear plates to preload, align centrally and with adjustable hanger brackets
horizontally and tack-weld
AL

! " #

3. Weld the bushes
4. When mounting the trailing arms:
- Lightly grease the stud thread and nut contact surface
- Mount wear plates
- Tighten lock nut M 24 to M = 650 (605 - 715) Nm
M 30 to M = 900 (840 - 990) Nm

  Important for all welding work! Welding method:
The trailing arms, air bags and plastic pipes Inert gas welding
should be protected against sparks and weld Weld wire quality G 4 Si 1 (DIN EN 440)
splashes during all welding work. The earth Manual arc welding
terminal must under no circumstances be Rod electrodes E 46 2 (DIN EN 499)
attached to the trailing arm or hub.
Mechanical quality values must be equivalent
to basic material S 355 J 2 or S 420.
Weld thickness a 4 up to a 5 (DIN EN ISO 25817)
Avoid end cavities and undercutting!

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