2588342C91 - Genuine International 2 Speed Fan Clutch - 1 - wisentpartscenter.com

Description

Genuine International HOR994636 2-Speed Fan Clutch is a Horton-designed engine cooling fan drive that gives the cooling system two operating speeds instead of simply switching the fan fully on or off. At lower cooling demand, the fan turns at reduced speed through the eddy-current drive; when maximum cooling is needed, the clutch locks up and drives the fan at full input speed.

Key Functions

- Provides lower-speed fan operation when full cooling is not required.
- Locks the fan to full input speed when engine temperature requires maximum airflow.
- Reduces unnecessary fan power draw and noise compared with running the cooling fan at full speed continuously.
- Helps maintain proper engine operating temperature under changing load and ambient conditions.

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

Purpose of the Part

The HOR994636 controls how much cooling airflow the engine receives without forcing the fan to operate at full speed all the time. During normal conditions it allows reduced fan speed, then locks into full-speed operation when the engine needs additional cooling.

Issue Symptoms / When to Replace

A worn or damaged fan clutch may show up as engine temperature running higher than normal under load, a fan that does not reach full speed when cooling demand increases, excessive fan noise, or a fan that stays fully engaged more often than it should. Air-supply problems can cause similar symptoms on a pneumatic fan drive, so the air circuit should be checked before replacing the clutch.

Brand Information

Horton was founded in 1951 and specializes in engine-cooling systems for OEM and aftermarket applications. Fan drives and fan clutches are one of the company's core product categories for heavy-duty commercial vehicles, and the DM Advantage line was developed specifically to manage cooling demand while reducing unnecessary fan speed, noise, and horsepower consumption.

Installation Notes

Confirm the correct fan pilot and clutch configuration before installation; visually similar Horton two-speed clutch packs are available with different pilot dimensions.

How to Identify an OEM Part

A genuine HOR994636 should carry Horton manufacturer identification with the Horton part or OEM number on the clutch assembly.

Why Buy HOR994636 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.

Shop with confidence

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.