Multiquip 31750Z2E803 Rectifier Regulator Assembly 20A GX630 - OEM Replacement Part

This 20-amp rectifier regulator assembly controls voltage output from the charging coil to maintain stable 12-volt DC power across the electrical system, preventing overcharging that can damage batteries, lights, and control circuits on ride-on power trowels. The unit integrates both rectification (converting AC to DC) and voltage regulation functions in a single assembly, connecting directly to the engine harness via the P1/J1 gray connector interface as shown in the wiring diagram.

In the electrical architecture, this rectifier assembly receives input from the engine's charge coil and outputs regulated +12VDC through black/yellow (B/Y) wiring to power critical systems including the 30-amp main fuse, ignition circuits, front halogen work lights, spray pump motor, and control panel. The unit grounds to chassis through black wire connections at multiple points. The 20-amp rating provides sufficient capacity for simultaneous operation of all electrical accessories during night finishing operations.

Compatible with the following Multiquip models:

• JWN24HTCSL Ride-On Power Trowel
• WTB-16 Concrete Buggy
• WTB-16PD Concrete Buggy

Genuine Multiquip OEM part, sold by an authorized dealer.