The YNF12211 (518-5137) Stick Ram Seal Kit is designed for CAT 330D excavators, providing a complete sealing solution for the stick (arm) hydraulic cylinder. Manufactured with premium rubber and polymer materials, this repair kit ensures excellent durability, leak-free performance, and extended service life even under heavy-duty working conditions.

• Compatible with CAT 330D excavators

• Direct replacement for OEM part number 518-5137

• Includes a full set of seals, gaskets, wear rings, and O-rings for complete cylinder maintenance

• Manufactured with high-quality NBR, PU, and PTFE materials resistant to heat, pressure, and hydraulic oil

• Ensures stable, leak-free operation of the stick (arm) hydraulic cylinder

• OEM-standard dimensions for easy installation and reliable sealing

• Suitable for routine cylinder servicing or major repair work

• Enhances the durability and performance of the stick cylinder under heavy-duty working conditions

• Compatible Machine: CAT 330D Excavator

• Cylinder Position: Stick / Arm Hydraulic Cylinder

• Suitable for general construction, demolition, mining, roadwork, and other heavy machinery applications.

• Technical guidance for installation

• Packing photos and size confirmation before shipment

• Stable supply for long-term orders

• Custom seal kit production for other models

• Individual seals packed in protective bags

• Outer packaging: sturdy export carton

• Optional YNF branded or neutral packaging

Q1: Is this seal kit compatible with other CAT models?
A: This kit is designed specifically for CAT 330D stick cylinders. For other models, please provide cylinder size or part number.

Q2: How long is the shelf life?
A: Seals can be stored for 18–24 months under proper storage conditions.

Q3: Can I mix this order with other parts?
A: Yes, we support mixed orders of any excavator parts.