Multiquip 42611 Mechanical Piston Pump Assembly 45cc 4.35ksi - OEM Replacement Part

This mechanical piston pump assembly delivers precise hydraulic control for blade pitch and stroke operations in ride-on power trowels. Operating at 45cc displacement and rated to 4.35ksi, this pump is critical for maintaining accurate blade positioning during finishing operations. The pump drives the hydraulic system that controls pitch pressure, steering pressure, and trowel speed adjustments outlined in factory calibration procedures.

During setup and calibration, this pump enables the hydraulic functions required for zero stroke position adjustment, pitch sensor calibration, and trowel speed synchronization between left and right sides. Technicians rely on this pump to maintain trowel speeds within factory specifications of 160 ± 3 RPM for HTX6H and 130 ± 3 RPM for STX6H models. The pump must deliver consistent pressure to keep blade pitch drift within the acceptable 3/16" tolerance during the 3-hour hydraulic system test. Failure symptoms include loss of pitch control, inconsistent blade speed, inability to maintain zero stroke position, or hydraulic pressure fluctuations during operation.

Compatible with the following Multiquip models:

• HTX6H
• STX6H

Genuine Multiquip OEM part, sold by an authorized dealer.