195-22-00030 1952200030 Original Construction Machinery Parts Seal O-Ring D375A-5 D375A-6

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2. 195-22-00030  parts on group :

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5. FAQ

Q: What is this set of seals used for?
A: This is a specialized sealing kit, typically used for engine cylinder liners, hydraulic cylinder bores, or pump housings. It includes several red O-rings and one black backup ring, designed to form a high-pressure, leak-proof seal between the liner and housing, preventing fluid loss and maintaining pressure.

Q: What materials are the parts made of?
A: The red O-rings are most commonly made of FKM (Fluoroelastomer/Viton) or Fluorosilicone (FVMQ) rubber. The black ring behind them is a PTFE or nylon backup ring.

Q: Why are these materials chosen?
A: FKM/Fluorosilicone rubber offers excellent heat resistance, oil compatibility, and compression set resistance, making them ideal for high-temperature engine or hydraulic applications. The PTFE/nylon backup ring prevents the O-ring from extruding into the gap under high pressure, ensuring the seal remains stable and reliable.

Q: What is the correct installation process?
A: Start by thoroughly cleaning the cylinder liner and housing bore to remove all dirt, oil, or debris. Inspect the liner and bore for scratches, burrs, or corrosion. Fit the backup ring into the groove first, then install the red O-ring behind it, making sure neither is twisted or overstretched. Lubricate the seals with clean engine oil or hydraulic fluid. When inserting the liner into the housing, use a tapered installation sleeve to protect the O-rings from catching on the bore edge.

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

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