Multiquip 521604 HATZ 4H50-9504 Diesel Engine - OEM Replacement Part

The HATZ 4H50-9504 turbocharged diesel engine is the primary power unit for Multiquip trailer-mounted concrete pumps, delivering the hydraulic power needed to operate high-pressure reciprocating piston systems that move concrete at rates up to 45 cubic yards per hour. This complete engine assembly is engineered to withstand the demanding duty cycles of concrete pumping operations, where consistent power delivery is critical for maintaining proper piston face pressures up to 1,100 psi and operating hydraulic systems with 50-gallon fluid capacities.

As specified in Multiquip's official operation manuals, this HATZ turbo diesel engine powers the LS450 concrete pump, which is capable of handling maximum aggregate sizes up to 1-1/2 inches and pumping through 3-inch to 5-inch diameter material hoses. Regular engine maintenance includes monitoring oil levels via the dedicated dipstick and maintaining proper fuel supply from the 40-gallon tank to ensure uninterrupted jobsite performance.

This engine replacement is required when experiencing loss of power, excessive smoke, catastrophic mechanical failure, or when rebuild costs exceed replacement value on high-hour units.

Compatible with the following Multiquip concrete pump models:

• LS450
• MQ600H

Genuine Multiquip OEM part, sold by an authorized dealer.