Removal Procedure
Tools Required
J 42058 Frame Adapter
Clamp
Important: To increase accessibility to the front impact bar, rotate the front
brake ducts and manually raise the headlamps.
- Remove the following panels and components to gain access to the impact
bar:
Notice: Be sure to protect vehicle components before cutting or grinding on
the bumper impact bar or frame rails.
- Visually inspect and restore as much of the damage as possible to specifications
using three-dimensional measuring procedures. Use J 42058
to secure the vehicle if pulling and straightening are required.
- Remove or reposition wiring to avoid damage.
- Cut the welds around the
perimeter of the frame rail (fishmouth) ends. Cut welds favoring the impact
bar side of the joint. Do not cut into the frame rails.
- Remove the damaged impact bar.
- Extract pieces of the
impact bar left attached to the rail ends. Keep the perimeter and shape of
the rail end (fishmouth) as original as possible.
Installation Procedure
- Straighten and deburr the rail ends to allow the service impact
bar to fit properly.
- Temporarily position the impact bar and scribe lines into the
primer indicating where the welds will be made.
- Remove the primer from the areas to be MIG welded by sanding with
80-grit paper on a Dual-Action (DA) sander. Do not use a grinder to remove
the primer.
- Prepare all bare metal surfaces and apply weld-through primer
as necessary. Be sure to apply primer to the inside of the 'fishmouth' area
also.
- Position the bumper impact bar using three-dimensional measuring
equipment and install per the original weld locations.
- Stitch weld around the
'fishmouth' joint.
• | If no trace of the original welds are present, follow the pattern
specified for welding the side rails to the impact bar. This weld pattern
will create a solid weld joint with minimal heat distortion. |
• | Clean and prepare all welded surfaces, use 3Ms Scotch-Brite®
Clean-N-Strip Discs (disc P/N 07460, mandrel P/N 07491) or equivalent. |
- Prime with two-part catalyzed primer.
- Apply anti-corrosion materials to all inner surfaces as necessary.
Do not combine paint systems. Refer to paint manufacturer's recommendations.
- Install the following panels and components.