McDonnell & Miller 63-M-HD Head Mechanism THPU32HP7Y maintaining a familiar interface while

maintaining a familiar interface while upgrading internal logic for modern standards

Most failures are secondary to a short circuit in the 24V line

008 ppm w/w maximum remaining oil content

Common Questions Does the MT1-57 come with the sensor included

Can I use this motor to replace a different brand of 1/2 HP motor

McDonnell & Miller 63-M-HD Head Mechanism THPU32HP7Y maintaining a familiar interface whileThe McDonnell & Miller 63 M HD Head Mechanism (Part Number 143200) is a heavy duty replacement head mechanism designed for the Series 63 Low Water Cut Off. Engineered for both hot water and steam boilers, this manual reset mechanical control ensures critical safety by interrupting the electrical circuit to the burner in 15 psi steam or 50 psi water applications. It features a robust float operated design and includes the No. 2 M switch, providing