Boom Cylinder Tube Bushing for Case 580K Phase III & 580 Super K Backhoes – D144421

Fits Models At A Glance:

• Case 580K — Phase III — After Serial Number JJG0020000
• Case 580 Super K (580SK)

Key Notes:

• Part Number: D144421
• Weight: 0.80 lbs (0.36 kg)
• Type: Boom cylinder tube bushing — boom cylinder attachment point
• Quantity Note: Two (2) bushings are required per machine — sold individually
• Application: Boom cylinder tube bushing — fits within the boom cylinder tube end bore at the boom pivot attachment point, providing a wear surface for the cylinder tube end pin and reducing metal-to-metal contact during boom cylinder operation on applicable Case 580K Phase III and 580 Super K backhoes
• Serial Number Note: 580K fitment applies to Phase III only — After Serial Number JJG0020000. Phase I machines (Before Serial Number JJG0020000) use a different bushing

Common Use Case or Symptoms:
Use when the boom cylinder tube bushing is worn, loose, or has visible scoring, the boom cylinder pin has developed play at the tube end mount, or during a full boom cylinder rebuild — a worn tube end bushing allows the cylinder pin to wear against the bare bore, causing progressive play and misalignment in the boom cylinder attachment on applicable Case 580K Phase III and 580 Super K backhoes.

Why Choose Broken Tractor:

• ✅ Phase III Serial Number Specific: D144421 fits the Case 580K Phase III (After Serial Number JJG0020000) and 580 Super K — confirm your 580K serial number before ordering. Phase I machines require a different bushing
• ✅ Two Required Per Machine — Sold Individually: Order the correct quantity for your boom cylinder rebuild. Two (2) bushings are needed per machine
• ✅ Fast Shipping from a U.S.-Based Team: In-stock and ready to ship from our U.S. warehouses