Product Description
BACK UP RING
Compatibility: Fits pallet jacks made by Lo-Jo, model 6600. SKU: LJ 17-E
Frequently Asked Questions
Q: What is the LJ 17-E BACK UP RING?
A: The LJ 17-E BACK UP RING is a support seal component for Lo-Jo model 6600 pallet jacks. Back up rings are used with primary seals in hydraulic cylinders and pumps to prevent extrusion of the main seal under high pressure.
Q: What equipment does the LJ 17-E fit?
A: The LJ 17-E BACK UP RING is designed specifically for Lo-Jo model 6600 manual pallet jack pump systems. Verify your equipment model matches before ordering.
Q: What is the material composition of the LJ 17-E?
A: Back up rings are typically manufactured from rigid polyurethane or PTFE (Teflon) plastic compounds designed to provide structural support without deforming under high hydraulic pressure.
Q: Why is a back up ring necessary with a primary seal?
A: Back up rings prevent extrusion or deformation of elastomer seals when subjected to high hydraulic pressures in pump and cylinder applications. Without a back up ring, primary seals can fail prematurely under load.
Q: When should the LJ 17-E back up ring be replaced?
A: Replace the back up ring whenever the associated primary seal is replaced, or if visible cracks, permanent deformation, or degradation is observed. A compromised back up ring cannot protect the primary seal effectively.