Product Description
Blade spring
Frequently Asked Questions
Q: What is the purpose of the UL H-2721-B101 blade spring in pallet jack assemblies?
A: The UL H-2721-B101 blade spring provides tension and return force to the control linkage mechanism in manual pallet jacks. It keeps the lift valve closed when the handle is in neutral position and allows controlled hydraulic flow when the operator engages the lift lever.
Q: What material is the UL H-2721-B101 blade spring made from and how does it resist corrosion?
A: The UL H-2721-B101 is a high-carbon steel blade spring with a formed or stamped design. Most manual pallet jack blade springs receive a zinc plating or phosphate finish to resist rust and corrosion in warehouse and outdoor environments. In damp storage areas, periodic inspection for surface corrosion is recommended.
Q: Which Uline pallet jack models use the UL H-2721-B101 blade spring?
A: The UL H-2721-B101 is a direct replacement for Uline Quick-Lift manual pallet jack models. Verify your equipment serial number and model designation against the Uline parts manual to confirm compatibility before ordering.
Q: What symptoms indicate a blade spring is failing and needs replacement?
A: A failing blade spring typically shows loss of lift control, difficulty lowering the jack smoothly, or the lift lever staying partially engaged after releasing. If the spring loses its tension, the lift valve cannot close properly and the jack will not hold load or respond to operator input.
Q: How long does a blade spring typically last on a pallet jack in normal warehouse use?
A: Under normal daily warehouse use, a blade spring has a typical lifespan of 5 to 8 years before loss of tension requires replacement. Heavy or continuous use, harsh chemicals, or exposure to temperature extremes can reduce this lifespan. Springs that are over-stressed or operate in cold storage environments may fail sooner.
Q: Can the UL H-2721-B101 be used as a cross-reference replacement for other manual pallet jack brands?
A: The UL H-2721-B101 is specific to Uline Quick-Lift equipment. Do not substitute blade springs from other manufacturers without verifying exact dimension matches, anchor point spacing, and load rating. Using an incorrect spring can cause safety issues and loss of lift control.