Bobcat 337 swivel joint leaks after rebuild: seal kit or complete center joint?
Short Answer
A swivel joint that leaks soon after a rebuild should not be treated as a simple seal-kit order until the bore, shaft surface, internal scoring, seal orientation, and case-drain condition are checked. If the sealing surface is worn or machined oversize, another seal kit may fail quickly and a complete center joint or good used core may be the safer order.
What To Check
- Inspect the center-joint bore and rotating shaft for scoring, pitting, taper, or previous machining marks.
- Confirm the seal-kit part number, seal direction, and whether all back-up rings and O-rings were installed in the correct grooves.
- Before ordering, send photos of the old swivel joint, machine serial number, port layout, and failed seal surfaces.
Related JIAJUE Parts
Send the machine model, serial number, old part label, and clear photos before ordering so JIAJUE PARTS can help reduce wrong-fitment risk.
Source Record
This question was selected from a current Google-visible result for the keyword excavator swivel joint leak weak travel forum. The answer is rewritten from JIAJUE parts-matching and sourcing practice, not copied from the source page.
