LINK AS-LH 1412957 - Caterpillar

PARTS DISPOSITION
Handle the parts in accordance with your WarrantyBulletin on warranty parts handling.Attach. (1-Rework Procedure)Rework Procedure
Rework Procedure Group 1: Inspection only
Field Inspection Instructions:1. Position the machine on a level surface and apply the ParkingBrake. Block and tagout the machine to restrict unexpected movement.2. Raise and secure lift arms to allow access to the Implement valvearea through the front service cover.3. Inspection of external welds: Using Illustration 4 as a reference,locate the fabricated tilt cylinder mounting blocks. Using either visualor non-destructive testing (NDT) methods, inspect both the inside and outsidewelds of both mounting blocks for cracks.Note: Dye penitrant testing is strongly suggested.4. Inspection of internal welds: Remove the front service cover overthe main hydraulic valve. Using Illustration 2 as a guide, locate the 8mmweld marked 'Z'. Using either visual or NDT methods, inspect the entirelength of the weld for cracks or a separation of the two structural plates.Note: Dye penitrant testing is strongly suggested.5. If no cracks or weld defects are found in either the internal orexternal welds, the PS program is completed.6. For weld repair, proceed to "Rework Procedure Group 2".
Rework Procedure Group 2: Weld RepairNote: Prior to doing any weld repair, evaluation of the damagedarea(s) needs to be completed to determine if a) a Group 2 Weld Repairis practical, or b) a Group 3 Replacement is required. See the weld repaircriteria below.
Weld Repair Criteria:Exterior Welds: Inspection of the Tilt Cylinder mounting blocks iscritical. See 'Field Inspection' Step 3. Grind the area(s) where Weld Defectsare found to determine the depth of the crack(s). Weld repair can be doneif the cracks found are not through the header top plate's parent metalor extend more than 25mm past the end of the weld(s). If the damage isnot weld repairable, proceed to Rework Procedure Group 3.Interior Welds: If 'External' cracks are repairable (as definedabove) or none exist, determine the extent of damage found in 'Field Inspection'Step 4. Weld repair can be done along the entire length of the 8mm-filletweld marked 'Z' in Illustration 2. The weld repair can also be done onthe opposite side, point 'A' to point 'B'. The exception is when the internalplate and top wrapper are separated in excess of 8mm at any point. If greaterthan 8mm, proceed to Rework Procedure Group 3.Field Installation Instructions:
Position the machine on a level surface and apply the Parking Brake.Block and tagout machine to restrict unexpected movement.
Raise and secure lift arms to allow access to the Implement valve areathrough the front service cover. Remove or relocate the Tilt Cylinder fromthe Loader's front frame to gain access to the welds needing repair.
Exterior Weld Repair on Cylinder Mounting Block(s): Prepare area(s)to be repaired by grinding or air arcing out the defective weld(s). Cleanaffective area(s) of all dirt and contamination. Using E7017 weld rod orequivalent,