PU B-1-29

Frequently Asked Questions

Q: What is the PU B-1-29 and where does it go on a pallet jack?
A: The PU B-1-29 is a top O-ring seal for the center hydraulic cylinder of Pallet Mule manual pallet jacks. It is precision-molded from oil-resistant synthetic elastomer to provide hydraulic sealing and prevent fluid leakage at the top of the center lift cylinder.

Q: What are the equivalent part numbers I should know about?
A: The PU B-1-29 supersedes and replaces PUB-1-29, PTB-1-29, and PT B-1-29. Alternate model designations include PU B129 and PU B 1 29. If you have documentation referencing any of these numbers, the PU B-1-29 is the correct current part.

Q: Why is this O-ring precision-molded rather than stamped?
A: Precision molding ensures uniform wall thickness and consistent compression set characteristics required for reliable hydraulic sealing. The precision-molded construction allows the PU B-1-29 to maintain its seal integrity across the pressure cycles typical in manual pallet jack center cylinders.

Q: Is the PU B-1-29 compatible with all Pallet Mule jacks?
A: The PU B-1-29 is designed specifically for Pallet Mule and Wesley-branded manual pallet jack center cylinders that use this seal specification. Verify your equipment matches Pallet Mule models before ordering. Cross-check against your jack documentation or existing part numbers.

Q: How long does this seal typically last in service?
A: Lifespan depends on usage intensity, storage conditions, and exposure to extreme temperatures. Regular use in moderate conditions typically provides several years of service. Oil-resistant synthetic elastomer resists degradation from standard hydraulic fluids, extending seal life compared to natural rubber alternatives.