BLADE AS 4T2808 - Caterpillar

PARTS NEEDED
No parts needed for this program
ACTION REQUIRED
Refer to the attached Rework Procedure.
SERVICE CLAIM ALLOWANCES
Product smu/age whichever comes first Caterpillar Dealer Suggested Customer Suggested
Parts % Labor Hrs% Parts % Labor Hrs% Parts % Labor Hrs%
0-1000 hrs,
0-12 mo 100.0% 100.0% 0.0% 0.0% 0.0% 0.0%
1001-5000 hrs,
13-24 mo 33.0% 50.0% 0.0% 0.0% 50.0% 50.0%
5001-10000 hrs,
25-48 mo 0.0% 50.0% 0.0% 0.0% 75.0% 50.0%
This is a 12.0-hour job
If there has been a previous repair, part age/hours will apply. Retain a copy of the previous repair invoice in the dealer's records for audit purposes, and specify repair date and machine hours in the "Additional Comments" section of the warranty claim.
PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Rework Procedure
Cracked C-Frame Rework Procedure:
Note: Repairing the welds with the C-Frame on the machine is not recommended if there are cracks on the bottom.
1. Weld a brace near the back of the C-Frame in order to reduce distortion caused by the welding. Refer to Image1.1.1.
Image1.1.1
2. Use an air arc or oxyacetylene torch to remove the cracked welds. Try to remove only the weld material and create a bevel groove. Remove the weld 100mm (3.9 inch) beyond the visible crack. A V-notch is needed for proper welding. Refer to Image1.2.1.
Image1.2.1
3. Leave the backup strips in place. The backup strips will be needed to provide a bottom for the new weld. Refer to Image1.3.1.
4. Use a grinder or wire brush to remove slag left from the cutting operation.
5. Use dye penetrant to verify that the crack is gone. If the crack is still visible, cut back the weld further.
6. Follow REHS1841, Special Instruction, "General Welding Procedures", for general weld procedures and preparation.
7. Use 70 ksi (500 Mpa) weld wire.
Image1.3.1
8. Complete multiple passes and alternate between left and right sides of the C-Frame. Refer to Image1.4.1.
Image1.4.1
9. Grind the area smooth. Image 1.5.1 shows how the weld should be ground smooth after welding. Grinding the weld improves the fatigue life of the weld repair.
10. Rework the bottom side, if necessary, and remove the brace that was installed in Step 1.
Image1.5.1