EA A158

Frequently Asked Questions

Q: What is the purpose of the top seal in a manual pallet jack hydraulic unit?
A: The EA A158 top seal seals the top of the hydraulic cylinder to prevent fluid leakage at the rod gland assembly. It maintains hydraulic pressure during mast extension and retraction.

Q: Which pallet jack models are compatible with the EA A158 top seal?
A: The EA A158 top seal fits manual pallet jacks with Model A hydraulic cylinders and pump assemblies. Verify your cylinder design and seal bore diameter match the EA A158 specifications before ordering.

Q: What material is the EA A158 top seal made from?
A: Top seals for hydraulic cylinders are typically manufactured from elastomer compounds such as nitrile (NBR) or polyurethane, selected to resist mineral oil hydraulic fluids and provide durable sealing under pressure cycles.

Q: What are the signs that the EA A158 top seal needs replacement?
A: Replace the top seal if hydraulic fluid leaks from the cylinder rod gland area, if the mast descends slowly under load, if the seal appears cracked or hardened, or if the pallet jack loses pressure during operation.

Q: How long does the EA A158 top seal typically last?
A: With proper hydraulic fluid maintenance and normal warehouse use, the EA A158 top seal typically lasts 2 to 4 years. High-cycle operations or contaminated fluid will reduce seal lifespan significantly.