Product Description
Seal
Frequently Asked Questions
Q: What is the CR 77697-1 seal and where is it used?
A: The CR 77697-1 is a hydraulic or pneumatic seal component used in electric lift truck cylinders and actuators. It prevents fluid leakage around piston rods and maintains system pressure. Common applications include slave cylinders, tilt cylinders, and load control valves in Crown, Toyota, Raymond, and Yale equipment.
Q: What is the difference between CR 77697-1 and CR 77697-2 seals?
A: CR 77697-1 and CR 77697-2 are variant seal kits designed for different cylinder configurations or fluid specifications. CR 77697-1 typically fits standard hydraulic systems, while CR 77697-2 may be designed for alternative applications or seal material compositions. Verify your equipment cylinder part number to select the correct variant.
Q: What material is the CR 77697-1 seal made from?
A: The CR 77697-1 is manufactured from nitrile (NBR) or EPDM rubber compounds rated for ISO 32 to ISO 46 hydraulic fluid service. Material composition ensures compatibility with standard lift truck hydraulic systems and provides durability in moderate temperature ranges. Do not expose seals to non-approved fluid types.
Q: How long does the CR 77697-1 seal remain effective before replacement?
A: Under normal operating conditions, the CR 77697-1 has a service life of 2 to 4 years. Lifespan depends on hydraulic fluid cleanliness, operating temperature, and cycle frequency. Contaminated hydraulic fluid significantly reduces seal life. In cold storage environments, seals may harden and fail within 1 to 2 years.
Q: What are signs that the CR 77697-1 seal is failing?
A: Common failure indicators include hydraulic fluid leaks around the cylinder rod, slow descent speed, inability to hold load, or visible cracking and hardening of the rubber seal material. If fluid pooling appears under cylinders or control response becomes sluggish, the seal is degraded and replacement is required.
Q: Which lift truck brands and models use the CR 77697-1 seal?
A: The CR 77697-1 is compatible with Crown, Toyota, Raymond, Yale, Hyster, and similar electric lift truck slave cylinders and tilt cylinders. Verify your specific cylinder model and serial range before ordering to confirm correct seal dimensions and fitment.