Cat 637 crack repair

Picked one by one from a mixed channel. Transcript check: Documents diagnosing and repairing cracks on heavy equipment, explaining the repair process.. Channel rule: Include only the long-form job videos with plain descriptive titles that document a specific repair, line-boring or fabrication process on named equipment (e.g. 'Line boring CAT 637 hitch parts', 'D10 Ripper Shank Repair', 'CAT 623 Draft Arm Repair'). Exclude shop updates and tours, purchase or new-equipment videos, sponsored-tool showcases, sub-5-minute clips, and any title using exclamation hooks.