Retrofit Packages prevent engine under- and over-cooling.

Press Release Summary:

Effective in all climates, Modulator® Fully Variable Retrofit Packages deliver optimized engine cooling. Packages replace on/off fan drives for heavy-duty, line-haul and severe-duty, vocational trucks where pneumatically actuated fan clutches over-cycle or do not provide optimum performance. Functionality promotes accelerated cab warm-up, efficient air-conditioning, and quiet operation while maximizing engine power to vehicle drive wheels and improving fuel conservation.

Original Press Release:

Horton Introduces Modulator® Variable Speed Retrofit Packages

Prevents under- and overcooling in all climates

ROSEVILLE, Minn. -- Horton introduces the Modulator® Fully Variable Retrofit Packages, which deliver optimized engine cooling for any climate. Aftermarket Modulator retrofit packages replace on/off fan drives for many heavy-duty line-haul and severe-duty vocational trucks where pneumatically actuated fan clutches over-cycle or do not provide optimum performance.

The Modulator retrofit packages offer faster cab warm-up, more efficient air-conditioning and quieter operation for improved operator comfort. These packages maximize engine power to the vehicle drive wheels and improve fuel savings in most applications. Modulator retrofit packages reduce downtime and have a long service life under severe-duty conditions.

The Modulator RCV250 Fan Drive is directly controlled and managed by the engine's electronic control module (ECM) in many applications. Modulator provides continuous variable, precise fan speed and is engineered to turn larger fans that require higher torque.

Two Modulator retrofit packages are available. For specific Cummins engine applications, the retrofit package contains:

Modulator RCV250 Fan Drive assembly -- Modulator Fan Drive, mounting bracket and pulley

Retrofit installation kit -- Horton's Di Controller, wiring harness and step-by-step installation manual

WindMaster® HS11 Fan

Retrofit packages for applications that do not require the Horton Di controller use the vehicle ECM to directly control the Modulator.

Product selection information is available on Horton's website at or call +1 651.361.6400 or 1.800.621.1320.

With more than 60 years of industry experience, commitment to service, reliability and innovation, Horton is a premium worldwide provider of fan drives, fans and suspension products. Horton's comprehensive research and development processes are driven by a dedication to exceed industry requirements today and in the future. The company has manufacturing plants in the United States and Germany, with licensed manufacturing facilities in Australia and the United Kingdom; offices in the United States, Canada, Mexico and Germany; and representatives in Chile, Russia, Japan, South Korea, China, India and Australia. Horton products include VMaster® and Stratis® Viscous Fan Drives, VMaster Di and Stratis Di Viscous Fan Drives and Controllers, DM Advantage® On/Off and Two-Speed Fan Drives, Modulator® Fully Variable Fan Drives, Arctis® Two-Speed Fan Drives, Electromagnetic On/Off Fan Drives, WindMaster® Fans, WindShift™ and Shogun® Modular Fans, Klondike Series® Replacement Fan Clutches for the Kysor® K22RA and K26RA as well as repair kits for Kysor's K26RA, K22RA and K22FA, PolarForce® Two-Speed Conversion Kits, DM Advantage Conversion Super Kits, Genuine Horton repair and retrofit kits, remanufactured fan drives and Roller Bushing Suspension Products. 

Horton, Inc.

2565 Walnut Street

Roseville, MN 55113


+1 651.361.6400

Kysor is a registered trademark of BorgWarner.

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