195-27-00020 1952700020 Original Construction Machinery Parts Seal O-Ring D355A-3X

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5. FAQ

Q: What is this gasket kit used for?
A: This is a precision service kit, commonly used in hydraulic pumps, valve bodies, or engine control units. It includes a paper/fiber gasket and a set of red O-rings, designed to create a complete, leak-tight seal between mating components, preventing fluid loss and maintaining internal pressure.

Q: What materials make up each part?
A: The light brown gasket is a compressed fiber or paper-based composite gasket. The red O-rings are typically made of high-temperature silicone or fluorosilicone rubber.

Q: Why these materials for this kit?
A: The fiber/paper gasket is formulated to withstand heat, oil, and pressure, while conforming to minor surface irregularities for a reliable seal. The red silicone/fluorosilicone O-rings offer excellent heat resistance, oil compatibility, and long-term elasticity, making them ideal for sealing fluid passages in high-temperature applications.

Q: What is the correct installation process?
A: Start by thoroughly cleaning both mating surfaces to remove all old gasket residue, oil, and debris. Inspect the surfaces for scratches, warpage, or corrosion that could affect the seal. Place the composite gasket onto the assembly, aligning it with all bolt holes and passages. Fit each O-ring into its respective groove, ensuring they are not twisted or overstretched. Torque the bolts to the manufacturer’s specifications in the recommended sequence to distribute pressure evenly across the gasket.

Q: How long can these parts last if installed correctly?

A: With proper installation, clean lubricant, and correct clearance settings, the oil seal can last 5,000–10,000 operating hours, while the metal shims will typically last the life of the assembly unless they are damaged during service.

Q: Can I reuse the old shims?

A: While the shims themselves don’t wear out, it’s best to use new ones if possible, especially if they are bent, scratched, or have been deformed during disassembly. Reusing old shims can lead to incorrect clearances if they are damaged, so always inspect them carefully before reuse. The oil seal, however, should always be replaced with a new one during service.

6. Exhibition and Wearhous

Oil seals,Hydraulic Seals, Cylinders Seal Kits, And More