Product Description
BACK-UP RING
Compatibility: Fits pallet jacks made by Jet, model BACK-UP RING. Alternate model: BACKUP RING; BACK UP RING. SKU: JT PT2748-018
Frequently Asked Questions
Q: What is a back-up ring and what does the JT PT2748-018 do?
A: The JT PT2748-018 is a back-up ring that provides structural support for primary seals in Jet pallet jack hydraulic assemblies. It prevents extrusion of the primary O-ring under high pressure, maintaining seal integrity during pump and cylinder operation.
Q: Which Jet models use the JT PT2748-018 back-up ring?
A: The JT PT2748-018 fits Jet pallet jack models designated as BACK-UP RING. Alternate model references include BACKUP RING and BACK UP RING. Check your equipment documentation to confirm compatibility.
Q: What is this back-up ring made from?
A: The JT PT2748-018 is manufactured from polyurethane or reinforced polymer material designed to resist hydraulic fluid exposure, maintain rigidity under pressure cycling, and prevent extrusion of the mating O-ring seal.
Q: Can a back-up ring fail, and what are the symptoms?
A: Yes. Replace the JT PT2748-018 if hydraulic fluid leaks increase at cylinder rod seals, if pressure builds inconsistently, or if the back-up ring shows permanent deformation, cracks, or brittleness during inspection of the seal assembly.
Q: How long does the JT PT2748-018 typically last?
A: The JT PT2748-018 back-up ring typically lasts 3-5 years in normal industrial service. Lifespan depends on pressure cycles, fluid condition, and storage temperature. Regular maintenance and prompt seal replacement prevent premature back-up ring degradation.