VJ 459

Frequently Asked Questions

Q: What is the VJ 459 bottom seal?
A: The VJ 459 is a hydraulic cylinder bottom seal for Valu-Jack model KD-5500 pallet jacks. It seals the bottom end of the cylinder where the piston rod connects, preventing hydraulic fluid leakage from the rod end of the cylinder.

Q: Which Valu-Jack models use the VJ 459 bottom seal?
A: The VJ 459 fits Valu-Jack model KD-5500 manual pallet jacks. Equivalent model designations are KD5500 and KD 5500. Confirm your equipment model before ordering.

Q: What material is the VJ 459 bottom seal made from?
A: The VJ 459 is manufactured from polyurethane or nitrile rubber formulated to maintain flexibility and compression set resistance through repeated lifting cycles and exposure to hydraulic fluid.

Q: What symptoms indicate the VJ 459 bottom seal needs replacement?
A: A failing bottom seal causes visible hydraulic fluid dripping from the bottom of the cylinder, loss of lifting pressure, or the jack will not hold a raised load. You may also see fluid pooling under the jack.

Q: How long does the VJ 459 bottom seal last in service?
A: Under typical warehouse use, the bottom seal lasts 3 to 5 years. Cold storage environments, frequent cycling, or use with contaminated hydraulic fluid will reduce the service life.

Q: What is the consequence of operating with a worn VJ 459 bottom seal?
A: Continued operation with a leaking bottom seal allows fluid loss and air infiltration into the rod end chamber, reducing lowering control, increasing friction, and risking corrosion damage to the internal piston rod surface.