Buy 99A9782 - Genuine Horton Two-Speed Fan Clutch Assembly - wisentpartscenter.com

Description

Genuine Horton 99A9782 Two-Speed Fan Clutch Assembly is a DM Advantage Two-Speed fan drive used to control engine-cooling airflow without running the fan at full speed all the time. The clutch provides a lower fan-speed mode for moderate cooling demand and full engagement when additional airflow is required, helping reduce unnecessary fan noise and horsepower draw while still providing full cooling capacity when needed.

Key Functions
- Provides low-speed and full-speed fan operation according to cooling demand.
- Uses eddy-current operation for reduced-speed cooling and spring-actuated engagement for full cooling.
- Reduces unnecessary full-speed fan operation when maximum airflow is not required.
- Drives the engine cooling fan when coolant, charge-air, or other monitored temperatures require additional airflow.

Verify fitment with us before ordering to ensure the correct part for your application.

Purpose of the Part

The 99A9782 controls how much cooling-airflow the engine fan produces. During moderate cooling demand, the two-speed clutch can drive the fan at reduced speed instead of locking it fully to the drive. When higher cooling capacity is needed, the clutch moves into full engagement so the fan can pull maximum airflow through the radiator and charge-air cooler.

Issue Symptoms / When to Replace

A failing fan clutch may cause engine temperature to rise under load if the fan does not fully engage, or excessive fan noise and reduced available engine power if it stays engaged when cooling demand is low. Irregular fan speed, repeated engagement cycling, air leakage, bearing noise, or excessive movement at the fan drive are also reasons to inspect the clutch. Control-air supply, fan controls, sensors, and the fan itself should be checked before replacing the complete assembly.

Brand Information

Horton was founded in 1951 and originally manufactured industrial clutches before applying its clutch technology to heavy-vehicle engine cooling in the 1960s. By the 1980s, Horton fan drives had become original equipment with major truck manufacturers, and the company continues to specialize in fans, fan drives, and thermal-management systems for on- and off-highway equipment.

The DM Advantage Two-Speed is Horton's two-speed heavy-duty fan-drive design, using reduced-speed eddy-current cooling and full spring-actuated engagement depending on cooling demand.

Installation Notes

Confirm the fan pilot diameter before installation. This 98A9782 family uses the 5.00-inch fan pilot; some visually similar BorgWarner configurations use a 2.56-inch pilot and may require a different fan blade when converted to this Horton assembly.

How to Identify an OEM Part

A genuine unit can be identified by the factory Horton identification showing OEM number 99A9782.

Why Buy 99A9782 from Wisent Parts

  • ⏱️
    Fast shipping
    Orders before 12PM EST ship same business day.
  • 🛡️
    180-day warranty
    All parts covered from delivery date.
  • ↩️
    Easy returns
    30-day returns.
  • ✅
    Verify fitment
    Send VIN/ESN and we’ll confirm.

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Warranty & Return Information
Warranty Information

Wisent Parts offers a 180-day warranty on all parts from the date of delivery. This warranty covers orders placed directly through our website. If a part fails during this period, we’re here to help - whether it’s a replacement, repair, or refund. For full details, refer to the Warranty page.

Return Information

Wisent Parts accepts returns within 30 days of delivery. All returns are subject to a restocking fee. To qualify, parts must be unused and in their original condition. For full return instructions and restocking fee details, please refer to the Returns page.