RL 4-00084

Frequently Asked Questions

Q: What is the RL 4-00084 upper valve pin and what does it do?
A: The RL 4-00084 is a round upper valve pin that regulates hydraulic flow and pressure relief in Rol-Lift Series T and E manual pallet jack pump assemblies. It controls the opening and closing of the hydraulic valve during lift and lower operations.

Q: Why does the RL 4-00084 require individual grinding for each pump?
A: Each Rol-Lift pump is manufactured with slight tolerances in bore diameter, valve seat dimensions, and internal cavity depth. The RL 4-00084 upper valve pin must be ground to precise specifications for each individual pump to function properly. Using an unground or incorrectly ground pin will cause hydraulic leakage or pressure failure. Do not interchange pins between pumps.

Q: Which Rol-Lift pallet jack models use the RL 4-00084 upper valve pin?
A: The RL 4-00084 upper valve pin is designed for Rol-Lift Series T and E manual pallet jacks. Confirm your equipment series and pump assembly model before ordering. Note that this part cannot be used interchangeably across models or equipment brands.

Q: What symptoms indicate the RL 4-00084 valve pin is faulty?
A: Replace the RL 4-00084 when the pallet jack holds pressure for only a few seconds instead of minutes, loses load height unexpectedly during operation, or the pump sounds abnormal with hissing or high-pitched noises. These symptoms suggest the valve pin has wear or damage that affects pressure sealing.

Q: Is the RL 4-00084 a direct replacement part or does it require machining?
A: The RL 4-00084 arrives as a blank round pin and must be ground to precise dimensions for your specific pump assembly. This is not a direct bolt-on part. Each pump requires custom grinding because pump cavities vary slightly between manufactured units. Consult your pump documentation or contact us for grinding specifications for your specific equipment serial number.