ProTrap 350 Motor | Donovan, Shur-Co Tarping Systems

High-Torque Power for Automated Hopper Trap Systems

The ProTrap 350 Motor (SKU: 20-1125713) is an industrial-grade, 12-volt direct-drive motor engineered specifically for Shur-Co and Donovan automated hopper trap systems on grain trailers and bulk commodity haulers. Designed to handle the extreme torque requirements of opening and closing loaded hopper traps, this power unit eliminates the physical strain and safety hazards associated with manual cranking. When your fleet's efficiency depends on fast, reliable unloading at the elevator or terminal, the ProTrap 350 delivers the consistent power needed to keep your trucks moving.

Unlike standard truck tarp system motors, the ProTrap 350 is built with a specialized high-reduction gear ratio that maximizes rotational torque at lower speeds. This ensures the motor can break loose frozen or tightly packed commodity traps without stalling or overheating. The fully sealed, weather-resistant alloy housing protects internal windings and bearings from agricultural dust, road salt, and moisture ingress. Whether you are replacing a worn-out motor or upgrading a manual trailer, this genuine OEM component guarantees exact fitment and restored performance.

Engineered for Shur-Co ProTrap Systems

This motor is an authentic OEM component manufactured to the exact specifications required for Shur-Co's ProTrap automated systems. It serves as the direct replacement power unit for the ProTrap electric hopper opener, integrating seamlessly with existing Shur-Co electrical controls, SMART2 remotes, and wiring harnesses. By using genuine replacement parts, you ensure that the mounting flange, output shaft, and electrical terminals align perfectly, eliminating the need for custom fabrication or warranty-voiding modifications during installation.

For agricultural haulers and bulk commodity fleets, standardizing on genuine ProTrap 350 motors means fewer unloading delays and reduced electrical failures. Pair this motor with a high-quality vinyl coated polyester trailer cover to ensure your entire load management system operates at peak efficiency, keeping your drivers safe while complying with all load securement regulations.

Technical Specifications

Verify compatibility with your existing hopper trap system using the technical specifications below.

Installation and Maintenance

Installing the ProTrap 350 Motor is a straightforward process for mechanics familiar with commercial trailer electrical systems. The motor mounts directly to the existing ProTrap drive assembly flange. We strongly recommend inspecting your system's wiring harness, 6-gauge battery cables, and contactor during installation; a failing contactor or corroded wiring can cause voltage drops that will prematurely damage a new motor. Always ensure the system is properly fused or equipped with a functional manual-reset circuit breaker to protect the motor from dead-stall conditions caused by frozen traps.

For comprehensive guides on maintaining your automated tarping and trap systems, visit the DeBrovys industrial fabrics and trucking blog.

Expert Application Guide: Choosing the Right Motor for Your System

As an industry standard component used across thousands of commercial agricultural and bulk hauling fleets, the ProTrap 350 Motor is designed for demanding use cases where reliability is non-negotiable. Fleet managers and owner-operators who have tested various aftermarket motors consistently report that the genuine Shur-Co unit outperforms in three critical areas: cold-weather torque retention, resistance to agricultural dust ingress, and long-term gear durability under continuous daily cycling.

When evaluating a replacement motor for your hopper application, consider the following expert criteria. First, verify your system type — this motor is specifically geared for the high-torque, low-speed requirements of hopper traps, not for rolling heavy duty mesh tarps over the top of the trailer. Second, inspect your vehicle's electrical system — a motor rated at 12V DC requires a healthy battery and clean, heavy-gauge ground connections extending all the way to the trailer. Voltage drops below 11V under load will cause sluggish operation and accelerated motor wear.

DeBrovys has been supplying industrial tarpaulins and automated system components to the trucking industry since 1885. Our technical team is available to assist with compatibility questions and system specifications. This product is an authentic OEM replacement tested to meet the original application requirements.

Frequently Asked Questions

Is this motor compatible with 24-volt electrical systems?

No. The ProTrap 350 Motor (1125713) is engineered exclusively for standard 12-volt DC commercial vehicle electrical systems. Operating this motor on a 24-volt system will cause immediate catastrophic failure and void the manufacturer warranty.

Does the motor include the mounting hardware and cover?

This listing is for the replacement motor unit only. Chrome or aluminum motor covers, mounting bolts, wiring harnesses, and electrical contactors are sold separately. You can typically reuse your existing mounting hardware and cover if they are in good condition.

Can I use this motor to roll a tarp over the top of my trailer?

While physically similar to standard tarp motors, the ProTrap 350 is geared specifically for hopper traps. It has a higher gear reduction for maximum torque at a slower RPM. For rolling tarps over the top of a trailer, a standard Shur-Trak HD or similar tarp motor is recommended for proper speed.

How do I know if my old motor has failed or if it is an electrical issue?

Before replacing the motor, use a multimeter to verify that a full 12 volts is reaching the motor terminals when the switch is engaged. If voltage is present but the motor does not turn, or if it turns very slowly and draws excessive amperage, the motor has likely failed. If no voltage is present at the motor, check your circuit breaker, rocker switch, and contactor solenoid first.