Product Description
Clark CL 25K40208 OEM O-ring, suitable for electric lift truck hydraulic systems. Buna-N nitrile 70 durometer, 0.739 inch ID, 0.070 inch section, compatible with petroleum-based hydraulic fluids.
Specifications
Material & Construction
| Material Specification | NBR (Buna-N), formulated for petroleum and hydraulic compatibility |
Part Numbers
| OEM Part Number | CL 25K40208 |
| Manufacturer Part Number | 25K40208 |
Frequently Asked Questions
Q: What are the specifications for the CL 25K40208 O-ring?
A: The CL 25K40208 is an NBR (Buna-N) nitrile O-ring with a 70 durometer hardness rating. It has an inner diameter of 0.739 inch and a section (cross-section) of 0.070 inch. This is an OEM Clark part engineered for electric lift truck hydraulic systems.
Q: What materials is this O-ring compatible with?
A: The CL 25K40208 is formulated for petroleum-based hydraulic fluids and mineral oils commonly used in industrial lift truck systems. Nitrile seals maintain reliable performance with standard hydraulic oils and provide excellent resistance to swelling and degradation in petroleum-based environments.
Q: What is the significance of the 70 durometer rating?
A: A 70 durometer nitrile seal provides the ideal balance of stiffness and flexibility for high-pressure dynamic sealing in hydraulic systems. This hardness allows the O-ring to maintain a tight seal under pressure while recovering elasticity during pressure cycles, supporting reliable long-term performance.
Q: What applications use the CL 25K40208?
A: This O-ring is suitable for hydraulic cylinders, pump casings, and control valve assemblies in Clark electric lift trucks. The specific dimensions (0.739 inch ID, 0.070 inch section) indicate this seal is used in precision hydraulic circuits. Verify fitment with your equipment model before ordering.
Q: How does the 0.070 inch section impact seal performance?
A: The 0.070 inch section (cross-sectional diameter) determines the squeeze ratio and sealing force of the O-ring. This thickness is engineered to provide adequate contact pressure against sealing surfaces while maintaining resilience and durability in typical lift truck hydraulic operating ranges.
Q: What symptoms indicate this O-ring needs replacement?
A: Replace the seal if hydraulic fluid leaks externally at cylinder ports or valve connections, if system pressure drops below specifications, or if lift or lower speeds become sluggish. Prompt replacement prevents fluid loss and protects hydraulic components from contamination and damage.
