TN 397815 A heavy duty .75hp 36VDC 200rpm gear motor. This motor is responsible for driving the disc scrub brushes (will not work on cylinder brush model scrubbers). Fits Tennant 5680-700 (28"), 800mm (32"), and 900mm (36") disc model walk behind scrubbers. (*) This motor was used on later models with serial numbers from 10000000-10548157 (earlier models with serial number 10000000-10548157 use TN 1063103). Please check your machine model number and serial number before ordering. Two motors are required per unit. Priced Each. Replaces Tennant 397815, 1066328. Our Part Number TN 397815