Product Description
Spring - caster inner
Frequently Asked Questions
Q: What is the IU SP-424 spring used for?
A: The IU SP-424 is the inner caster spring on manual and electric pallet jacks. It provides suspension compliance and load damping for the caster wheel assembly, absorbing impact and vibration during operation.
Q: What is the spring rate and load capacity of the IU SP-424?
A: The IU SP-424 inner caster spring is engineered for standard 5000 to 6000 pound load jacks. The spring rate is calibrated to provide smooth caster action under rated capacity without sagging or bottoming out.
Q: Which pallet jack models use the IU SP-424?
A: The IU SP-424 fits caster assemblies on manual pallet jacks and some electric models from Crown, Toyota, Raymond, Yale, and Hyster. Verify the caster model and jack capacity rating before ordering.
Q: What material is the IU SP-424 spring made from?
A: The IU SP-424 is made from heat-treated carbon steel with a plated finish. This construction provides fatigue resistance over millions of load cycles and protection against corrosion.
Q: How long does the IU SP-424 spring last before replacement?
A: In normal warehouse use, the IU SP-424 typically lasts 4 to 7 years. Premature failure occurs if the jack regularly exceeds rated load or operates on extremely rough surfaces.
Q: What are the symptoms of a failed IU SP-424?
A: Signs of spring failure include visible sagging of the caster assembly, harsh or clunking movement when traveling, reduced shock absorption, or the jack settling lower than normal when parked. A damaged spring compromises load stability and operator control.
