Multiquip EM98222 Pilot Main Valve LS Pumps - OEM Replacement Part

The pilot main valve controls hydraulic flow direction and timing in the pumping circuit of Multiquip LS-series structural concrete pumps. This critical hydraulic component regulates the switching action between forward and reverse strokes, ensuring smooth, consistent material flow during concrete placement operations. When pilot main valves fail or develop internal wear, symptoms include erratic pumping cycles, loss of stroke consistency, reduced output volume, or complete pump failure.

Designed specifically for LS-series trailer-mounted and truck-mounted concrete pumps, this valve maintains proper hydraulic pressure distribution throughout the pumping cycle. Regular inspection of hydraulic components is essential when pumping long distances or handling stiff mixes, as noted in Multiquip service documentation, since these conditions increase stress on valve assemblies and can accelerate wear.

Compatible with the following Multiquip concrete pump models:

• LS-40
• LS-40TD
• LS-50TD
• LS300

Genuine Multiquip OEM part, sold by an authorized dealer.