Product Description
Seal
Frequently Asked Questions
Q: What is the CR 77697-2 seal and when is it used instead of CR 77697-1?
A: The CR 77697-2 is an alternate hydraulic seal kit designed for specific cylinder configurations or fluid compatibility requirements in electric lift trucks. It is used when standard CR 77697-1 seals do not match your cylinder bore size, rod diameter, or operating fluid specification. Always verify your equipment documentation before substituting between variants.
Q: What are the material and fluid compatibility specifications for CR 77697-2?
A: The CR 77697-2 seal is manufactured from nitrile or EPDM rubber compounds and is rated for ISO 32 to ISO 46 hydraulic fluid service in standard electric lift truck applications. Confirm fluid type compatibility with your equipment manual. Using incompatible fluid causes rapid seal degradation and leakage.
Q: How do I determine if my equipment needs CR 77697-1 or CR 77697-2?
A: The correct seal variant depends on your specific cylinder model, bore size, rod diameter, and seal cavity design. Locate the cylinder part number on your slave cylinder or tilt cylinder and reference your equipment service manual. Contact us with your cylinder part number and we will identify the correct CR 77697 variant for your application.
Q: What is the typical service life for the CR 77697-2 seal?
A: Under normal operating conditions, the CR 77697-2 has a service life of 2 to 4 years. Durability depends on hydraulic fluid contamination, operating temperature, and cylinder duty cycle. Cold storage environments and contaminated hydraulic fluid reduce lifespan to 1 to 2 years.
Q: What failure symptoms indicate the CR 77697-2 seal needs replacement?
A: Failure indicators include hydraulic fluid leaks at the cylinder rod, slow or jerky descent response, inability to maintain load position, visible seal cracking, or hardened rubber material. Puddles of fluid under cylinders or declining control responsiveness signal seal degradation requiring immediate replacement.