Description
KB799764-2X - HORTON DRIVEMASTER ADVANTAGE TWO-SPEED FAN CLUTCH FOR PETERBILT CUMMINS ISL/ISL-G/L9N AND PACCAR PX-9 - REMANUFACTURED
PART NUMBER(S):
Fleet Products: KB799764-2X (Remanufactured) | Replaces OE: Horton: 799764, 799764-2, 79A9764, 79A9764-2, 989764, 989764-2, 98A9764, 98A9764-2, 999764, 999764-2, 99A9764, 99A9764-2 | Peterbilt: F17-6009M05, F17-6009M26, F17-6013M26, F17-6014M05, F17-6017M02 | Kit Masters: 99764, 99764-2, 997642, KMI997642, KMN20997642 | Alliance: ABPN20997642 | Fleetrite: FLT997642
DESCRIPTION:
Model: Horton DriveMaster Advantage Two-Speed Fan Clutch
Vehicles: Peterbilt 320, 320 FEPTO, and 520 trucks from 2010-2025 with Cummins ISL, ISL-G, L9N, or PACCAR PX-9 engines
• Back Pulley Diameter: 6.65"
• Front Pulley Diameter: 6.54"
• Belt Configuration: Dual 8-rib and 6-rib serpentine belts
• First Belt Groove Distance: 2.25"
• Overall Length: 10.20"
• Fan Blade Bolt Circle: 6.00"
• Fan Pilot Diameter: 5.00"
• Fan Blade Stud Length: 1.98"
• Fan Blade Stud Thread: 5/16"-18
• Vertical Mounting Distance: 2.01"
• Horizontal Mounting Distance: 4.41"
• Journal Bracket Center to Upper-Right Mounting Hole: 4.21"
• Low-Speed Operation: Eddy-current drive
• High-Speed Operation: Spring-actuated engagement
CROSS-REFERENCE(S):
79A9764RMAN, F176009M05, F176009M26, F176013M26, F176014M05, F176017M02, HOR79A9764, HOR 79A9764, HORTON 79A9764, P99A9764, 3912-79A9764, 3443-997642, ABP N20 997642, KM N20 997642, RX79A9764RMAN, RX79A9764RMANRF, FTL799764, FTL799764-2, 10023231
A cross-reference listing means this part may be a suitable replacement for the listed part numbers. Always verify fitment before installation.
IMPORTANT INSTALLATION NOTES:
✔ Confirm the dual 8-rib/6-rib belt configuration and both pulley diameters against the removed clutch.
✔ Verify the 5.00" fan pilot, 6.00" bolt circle, fan stud dimensions, and mounting distances before installation.
✔ Inspect both belts, pulleys, fan blades, mounting bracket, air lines, solenoid, electrical connector, and wiring.
✔ Replace worn mounting hardware and torque all fasteners to Horton or Peterbilt specifications.
✔ Verify pulley alignment, fan-to-shroud clearance, air-control response, and both low- and high-speed operation.
Drivemaster 2-Speed Repair Kits:
SOLD AS REMANUFACTURED – CORE RETURN REQUIRED
Built to OEM standards — thoroughly cleaned, inspected, and tested to ensure durability, performance, and reliability in demanding applications.
Warranty Information
