Product Description
GSK 527 is a hydraulic seal kit designed for OEM-spec pallet jack and forklift cylinder maintenance, featuring polyurethane and nitrile seals with spring steel retention components, supporting up to 5000 PSI hydraulic pressure. Intended for use in cylinders with 1.5 inch shaft diameter requiring standard U-cup and O-ring profiles.
Specifications
Hydraulic
| Primary Seal Material | Polyurethane (PU) |
| Secondary Seal Material | Nitrile rubber (NBR) |
| Seal Hardness | Shore A 90 (polyurethane), Shore A 70 (nitrile rubber) |
| Pressure Rating | 5000 PSI maximum working pressure |
Material
| Back-Up Ring Material | Virgin PTFE |
Part Numbers
| Manufacturer Part Number | GSK 527 |
Frequently Asked Questions
Q: What is the maximum pressure rating of the GSK 527 seal kit?
A: The GSK 527 supports up to 5000 PSI hydraulic pressure, making it suitable for high-pressure pallet jack and forklift cylinder applications that demand superior sealing performance under extreme load conditions.
Q: What shaft diameter is the GSK 527 designed for?
A: The GSK 527 is engineered for cylinders with a 1.5 inch shaft diameter using standard U-cup and O-ring profiles. This dimension is common across many industrial pallet jack and forklift hydraulic cylinders.
Q: What materials are used in the GSK 527 seal kit?
A: Primary seals are polyurethane (PU) with Shore A 90 hardness for excellent wear resistance. Secondary seals use nitrile rubber (NBR) with Shore A 70 hardness for flexibility and sealing integrity. Back-up rings are virgin PTFE (polytetrafluoroethylene), and retention components use spring steel for durability.
Q: Which pallet jack and forklift models use the GSK 527?
A: The GSK 527 is designed as an OEM-spec replacement for standard pallet jack and forklift cylinders across major manufacturers including Crown, Toyota, Raymond, Yale, and similar brands. Verify shaft diameter and cylinder bore match this kit before ordering.
Q: Why does the GSK 527 use polyurethane instead of only nitrile seals?
A: Polyurethane primary seals provide superior abrasion resistance and durability under high-pressure cycling, especially in demanding industrial applications reaching 5000 PSI. Nitrile secondary seals add flexibility and pressure compensation. This combination delivers optimal performance and extended service life.
Q: What is the purpose of the virgin PTFE back-up ring in the GSK 527?
A: The virgin PTFE back-up ring prevents extrusion of the primary seal into the cylinder gap during high-pressure operation. This is critical at 5000 PSI, where seal extrusion would cause leakage and rapid seal failure.