WW PM-28P

Frequently Asked Questions

Q: What is the WW PM-28P valve ball and what does it do in a Dayton pallet jack?
A: The WW PM-28P is a valve ball component in the hydraulic system of Dayton model 3KR84 manual pallet jacks. It controls the directional flow of hydraulic fluid, allowing the jack to lift and lower the load under operator control.

Q: Is the WW PM-28P valve ball compatible with other pallet jack brands?
A: The WW PM-28P is specified for Dayton model 3KR84 pallet jacks only. Do not attempt to cross-reference this part to other brands without verifying ball diameter, valve body bore size, and pressure rating. Incompatible valve balls can damage the hydraulic system or cause uncontrolled descent of the load.

Q: What material is the WW PM-28P valve ball made from?
A: Valve balls in hydraulic systems are typically made from hardened steel or stainless steel to withstand repeated contact with the valve seat and exposure to hydraulic fluid. This hardness resists wear and maintains a tight seal under pressure. Exact material specification should be confirmed in your equipment manual.

Q: What are the warning signs of a failing WW PM-28P valve ball?
A: Signs of valve ball failure include hydraulic fluid leaking from the valve body, inability to control lift or lower speed, uncontrolled or sudden descent of the load, or difficulty engaging the control lever. A stuck or damaged valve ball prevents proper fluid flow and creates a safety hazard. Do not operate the jack if valve function is compromised.