Procedures

WM 517055 Replacing threaded bushing for seat connection

Tools






Preliminary work

Preliminary work for body repairs with alignment bench

1. Removing accessories in the repair area.
1.1. Remove accessories in the repair area according to the extent of damage on the vehicle.
2. Covering the accessories adjacent to the area of the vehicle requiring repair.
2.1. Cover all accessories remaining on the vehicle and the neighbouring areas with fire-proof, protective covers.
3. Exposing welding areas.
3.1. Remove undersealing, paint, etc. from the welding areas of the body with a hot-air gun or rotary brush.

Tools and materials






Technical values






Removing threaded bushing for seat connection





1. Drilling the drain hole out
1.1. On the extension of the seat cross member, use a conical shell reaming drill NR.128 to bore out the diameter of the drain hole to the dimension -A- = 30 mm.





2. Remove burrs from the edges of the hole.





3. Separate welded joints
3.1. Drill out a connection between the seat cross member and the threaded insert using a spotweld cutter NR.129.





4. Removing threaded bush.
4.1. Take out the old threaded bush -1- through the widened opening.










Installing threaded bushing for seat connection





1. Preparing the threaded bush for installation





1.1. Grind the threaded bush -1- bright on the contact surface with the seat cross member.





2. Inserting threaded bush.
2.1. Insert a new threaded bush -1- fully into the seat cross member from below.
2.2. Set the threaded bush -1- at a slight angle.
2.3. Insert an M8 x 120 bolt -2- into the seat cross member from above.
2.4. Screw the bolt -2- approx. three revolutions into the threaded bush -1-.
2.5. Pull the threaded bush -1- with the screw -2- up to the seat cross member.





3. Position the threaded bush and weld it into place.
3.1. Align the threaded bush -1- in the middle.
3.2. Weld the threaded -1- insert into the existing holes using MIG welding.









4. Grinding the spot welds flat
4.1. Unscrew the bolt and grind the spot welds flat.
5. Clean spot-welded joints and sheetmetal flanges with a wire brush.
6. Prime welds and unpainted areas of the body with 2K primer.
7. Sealing flange areas with body sealant.
8. Add cavity preservation inside the seat cross member => Cavity preservation.
9. Closing the drain hole.
9.1. Close the drain hole by inserting a 30-mm diameter plug -3- from below.





10. Restore standard seal with body sealant=> Seam seal
11. Restore standard underbody protection with underbody sealing compound => underseal.