KIT-GEAR 4673068 - Caterpillar

Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.Problem
Illustration 1 g03663323
Illustration 2 g03664457
The 291-5797 Track Roller Frame Gp and/or 308-4736 Track Roller Frame Gp may crack at the front structure which supports the equalizer bar on the machines listed above. The cracks may occur at location (A) or location (B) or location (C) of the two brackets.Solution
Caterpillar is aware of this problem and recommending to follow the below rework procedure.
Illustration 3 g03663334
Before proceeding with the rework procedure, use a dye-penetrant test to check for any missed cracks on both left-hand and right-hand track roller frame group.
Air arc gouge and grind out the welding cracks.
Illustration 4 g03663336
(W1) A three pass 10 mm (0.4 inch) fillet weld
Weld the cracks as per dimensions shown in Illustration 4.Refer to Special Instruction, REHS1841, "General Welding Procedure" and Special Instruction, SEBD0512, "Service Welding Guide".
Paint all the welded surfaces.