472-8026 4728026 Loader Hydraulic Cylinder Seal Kit 140H NA

1. Quick Details of  seal 472-8026 :

2.472-8026  picture:

3. Service part number :

4. FAQ

Q: What is this cylinder seal kit used for?
A: This is a complete overhaul kit for a hydraulic cylinder, containing all the seals and guides needed to rebuild it. It restores leak-tight performance, maintains pressure, and prevents contamination from entering the cylinder.

Q: What materials are each component made of?
A: The brown ring is a fabric-reinforced phenolic guide/wear ring. The white rings are typically UHMWPE or PTFE-based seals. The blue seals are polyurethane (PU) rod/piston seals. The small black O-rings are usually Nitrile (NBR) rubber.

Q: Why are these materials chosen for their roles?
A: The phenolic guide ring offers high load capacity, low friction, and prevents metal-to-metal contact. The white PTFE/UHMWPE seals provide excellent wear resistance and low friction for dynamic sealing. Polyurethane seals are highly durable, resistant to extrusion, and handle high pressures well. Nitrile O-rings offer reliable static sealing with good oil compatibility.

Q: How do I install this kit correctly?
A: Start by fully disassembling the cylinder and cleaning all parts thoroughly. Inspect the rod, piston, and bore for wear or scoring. Install the piston seals first, using a seal installation tool to avoid twisting. Fit the guide ring onto the piston, then install the rod seals in the gland, making sure they’re oriented correctly. Lubricate all seals with clean hydraulic oil before assembling the piston into the cylinder, using a tapered sleeve to protect the seals during insertion. Reassemble the gland and test the cylinder for leaks before putting it back into service.

5. Exhibition and Wearhous

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