Product Description
Allis Chalmers AC 4907720 hydraulic oil seal for electric lift truck. Direct OEM replacement for specified models. No supersession or interchange numbers available from manufacturer or trusted industrial sources.
Specifications
Part Numbers
| OEM Part Number | AC 4907720 |
| Manufacturer Part Number | 4907720 |
Frequently Asked Questions
Q: What is the AC 4907720 seal designed for?
A: The AC 4907720 is an OEM hydraulic oil seal designed specifically for Allis Chalmers electric lift trucks. It prevents hydraulic fluid leakage from the lift cylinder and maintains system pressure. This is a direct replacement part with no known supersessions or interchange equivalents.
Q: What material is the AC 4907720 seal made from?
A: The AC 4907720 is a hydraulic oil seal engineered for mineral-based hydraulic fluids common in industrial lift equipment. Verify your fluid type matches the seal material compatibility before installation. Incompatible fluids can degrade the seal prematurely.
Q: How do I know if the AC 4907720 seal is failing?
A: Signs of seal failure include visible hydraulic oil drips under the lift cylinder, reduced lift pressure, inability to maintain load height, or sluggish lift performance. Oil staining around the cylinder rod indicates seal leakage requiring replacement.
Q: What is the typical lifespan of the AC 4907720 seal?
A: Hydraulic seals typically last 3-5 years depending on system maintenance, fluid condition, and duty cycle. High-usage electric lift trucks may require seal replacement sooner. Regular hydraulic fluid inspection and system maintenance extend seal life.
Q: Are there cross-reference or equivalent part numbers for the AC 4907720?
A: The AC 4907720 is an OEM Allis Chalmers seal. No manufacturer supersession numbers or interchange equivalents from trusted industrial sources are available. Use only the OEM part number AC 4907720 for direct replacement.
Q: What hydraulic fluid type is compatible with the AC 4907720 seal?
A: The AC 4907720 is designed for standard ISO VG 46 mineral-based hydraulic oils used in industrial lift equipment. Check your truck documentation for fluid specifications. Using non-compatible fluids can damage the seal and cause system leaks.