Multiquip 42628-1 Coupler Rexroth Pump - OEM Replacement Part for Ride-On Trowels

The coupler connects the Rexroth hydraulic pump to the drive system on Multiquip HTX6H and STX6H ride-on trowels, transferring engine power to the hydraulic system that controls blade rotation and steering functions. This critical drivetrain component operates within a hydraulic system holding 8 gallons of Parker DuraClean ISO 46 hydraulic oil and must maintain precise alignment to ensure proper power transfer to the rotors.

These heavy-duty ride-on trowels feature Hatz 4H50TIC turbocharged diesel engines and operate at rotor speeds of 0-160 RPM (HTX6H) and 0-130 RPM (STX6H), requiring a robust coupler to handle the constant torque demands of professional concrete finishing. The hydraulic pump drives both the blade rotation system and steering controls, making coupler integrity essential for safe operation. Failed couplers typically present as loss of hydraulic pressure, unusual vibration, or inability to achieve proper blade speed when the foot pedal is pressed.

Compatible with the following Multiquip models:

• HTX6H Ride-On Trowel
• STX6H Ride-On Trowel

Always disconnect battery cables before performing any service or maintenance on ride-on trowels. Genuine Multiquip OEM part, sold by an authorized dealer.