Product Description
U-Cup
Compatibility: Fits pallet jacks made by Dayton, model 4YX97. SKU: DA B151-97
Frequently Asked Questions
Q: What is the DA B151-97 U-cup and what does it do?
A: The DA B151-97 is a U-cup seal (also called a packing ring or rod seal) that fits Dayton model 4YX97 pallet jacks. It seals the interface between the piston rod and cylinder bore to prevent hydraulic fluid leakage.
Q: Does the DA B151-97 U-cup fit other pallet jack brands?
A: This part is specified for Dayton model 4YX97 equipment. Cross-compatibility with other brands or models is not recommended without verifying bore diameter, rod diameter, and gland design specifications.
Q: What happens when a U-cup seal fails?
A: A failing U-cup allows hydraulic fluid to leak past the rod, resulting in loss of pressure and reduced lifting capacity. You may notice the jack will not hold its load, drops slowly, or loses pressure when stationary. Fluid leakage around the rod is a clear indicator of failure.
Q: What material is this U-cup seal made from?
A: The DA B151-97 is manufactured from NBR (nitrile rubber) or similar elastomer compound, selected for compatibility with conventional mineral-based hydraulic oils. This material provides excellent pressure sealing across typical pallet jack operating ranges.