Tigercat Grapple Cylinder Seal Kit for Prentice 490, Cat 518 – 93933

Fits Models At A Glance:

Prentice Skidders — ESCO Sorting Grapple:

• 490

Caterpillar Skidders:

• 518

Key Notes:

• Part Number: 93933
• Weight: 0.40 lbs (0.18 kg)
• Rod Diameter: 2-1/2 in
• Bore Diameter: 4-1/2 in
• Type: Grapple cylinder seal kit
• Kit Contents: Complete set of seals, O-rings, and wipers to reseal one grapple cylinder
• Catalog Note: Tigercat-catalogued seal kit, covering the forestry line Tigercat acquired from the Prentice and Caterpillar knuckleboom program
• Attachment Note: Fits the ESCO sorting grapple cylinder on the Prentice 490 skidder
• Application: Rebuilds the grapple cylinder that opens and closes the sorting grapple, restoring clamping force and holding pressure

Common Use Case or Symptoms:
Use when the grapple won't hold its clamp under load, drifts open, or the cylinder is visibly leaking — a full reseal restores holding pressure without replacing the entire cylinder.

Why Choose Broken Tractor:
✅ Correct 2-1/2 In Rod, 4-1/2 In Bore Match — sized to the grapple cylinder for a proper seal
✅ Forestry Parts Are Our Specialty — we stock skidder and feller buncher components, not general supply
✅ Fast Shipping from a U.S.-Based Team — ready to ship from our U.S. warehouses