Product Description
Jet JT PT2748-021 Back-Up Ring for manual pallet jack hydraulic mechanisms. OEM specification for Jet PT2748 series, used as a support component in hydraulic seal assemblies. Compatible with PT2748, PT2748A, PT2748C, PT2748J, PT2748L, PT2748MD, and PT2748W models.
Compatibility: Fits pallet jacks made by Jet, model PT2748. SKU: JT PT2748-021
Specifications
Part Numbers & Compatibility
| Manufacturer Part Number | JT PT2748-021 |
| OEM Part Number | JT PT2748-021 |
| Compatible Model Series | Jet PT2748, PT2748A, PT2748C, PT2748J, PT2748L, PT2748MD, PT2748W |
Frequently Asked Questions
Q: What Jet pallet jack models does the JT PT2748-021 back-up ring fit?
A: The JT PT2748-021 is an OEM part for Jet PT2748 series pallet jacks. It is compatible with PT2748, PT2748A, PT2748C, PT2748J, PT2748L, PT2748MD, and PT2748W model variations. Verify your specific model matches this list before ordering.
Q: What is the function of the JT PT2748-021 in the hydraulic mechanism?
A: The JT PT2748-021 is a back-up ring component used as a support element in hydraulic seal assemblies. It prevents seal extrusion during high-pressure lifting cycles and maintains the integrity of the primary O-ring seal in the pump or cylinder bore.
Q: Is the JT PT2748-021 an OEM part or aftermarket equivalent?
A: The JT PT2748-021 is an OEM specification part manufactured to Jet original standards. It is the factory-approved replacement for PT2748 series hydraulic seal assemblies and meets the exact pressure ratings and dimensional tolerances of the original equipment.
Q: When should the JT PT2748-021 back-up ring be replaced?
A: Replace the JT PT2748-021 if hydraulic fluid leaks appear at rod seals, if the pump loses lifting pressure, or if the seal assembly has been disassembled for inspection and the back-up ring shows wear, cracks, or permanent deformation.
Q: Can the JT PT2748-021 be used as a cross-reference for other part numbers?
A: The JT PT2748-021 is a specific OEM part number for Jet PT2748 series jacks. Before substituting with alternative part numbers from other suppliers, verify dimensions and material specifications match your equipment manual to ensure proper fitment and sealing performance.
Q: What is the typical service life of this back-up ring?
A: The JT PT2748-021 typically provides 3-5 years of reliable service in normal use conditions. Lifespan depends on frequency of lifting cycles, hydraulic fluid maintenance, operating temperature ranges, and whether the pallet jack is used in standard or demanding warehouse environments.