Product Description
Precision radial oil seal designed for electric lift truck axle and hydraulic system applications. Features a robust NBR rubber construction with steel reinforcement, providing reliable oil containment and long-term durability. This direct replacement seal delivers consistent performance in demanding material handling environments, compatible with leading lift truck manufacturers. Rated for moderate pressure hydraulic systems with proven field reliability across diverse electric forklift and pallet jack platforms.
Specifications
Material & Construction
| Seal Material | Nitrile Rubber (NBR) |
| Hardness | 70 Shore A |
Mechanical Specifications
| Pressure Capability | Up to 7 bar (101 PSI) |
| Shaft Surface Finish | Ra ≤ 0.8 μm |
| Operating Speed Limit | ≤ 3600 RPM |
| Directional Lip | Single lip |
Part Numbers
| Manufacturer Part Number | 116311 |
Frequently Asked Questions
Q: What are the exact dimensions of the 116311 oil seal?
A: The 116311 is a precision radial oil seal with an outer diameter of 76.38 mm, inner diameter of 55.63 mm, and width of 9.55 mm. These dimensions are critical for proper fitment in axle housings and hydraulic cavities. Verify your equipment specifications match before ordering.
Q: What equipment brands does the 116311 seal fit?
A: The 116311 is an OEM equivalent seal for electric lift truck axle assemblies manufactured by Crown, Toyota, Raymond, and Yale. It is compatible with hydraulic systems requiring a 76.38 mm OD seal rated for moderate pressure containment. Cross-reference your truck model and hydraulic schematic to confirm fitment.
Q: What is the pressure rating and maximum speed of the 116311 seal?
A: The 116311 is rated for operating pressures up to 7 bar (101 PSI) and shaft velocities up to 3600 RPM. These limits ensure reliable oil containment without exceeding material stress limits. Operating beyond these parameters may cause premature seal failure or leakage.
Q: What material is the 116311 seal and why is NBR used?
A: The 116311 is manufactured from nitrile rubber (NBR) with a hardness of 70 Shore A and steel reinforcement. NBR is selected for resistance to mineral hydraulic oils and long service life in cold storage and outdoor environments. The steel reinforcement prevents extrusion under load and pressure cycling.
Q: How long should the 116311 seal last in service?
A: Under normal operating conditions within pressure and speed limits, the 116311 typically provides 3 to 5 years of service. Seals operating consistently at maximum pressure (7 bar) and speed (3600 RPM) may wear faster. Oil contamination, shaft surface roughness greater than Ra 0.8 µm, and thermal cycling accelerate wear. Replace immediately if leakage occurs around the seal cavity.
Q: What shaft surface finish is required for proper 116311 seal operation?
A: The shaft surface finish requirement is Ra = 0.8 µm (roughness average). Shafts that are too rough or damaged will cause rapid seal lip wear and leakage. If you suspect shaft damage, measure or have the shaft inspected before installing a new seal.