Description
KB799570-2X - DRIVEMASTER TWO-SPEED FAN CLUTCH - WESTERN STAR DD13, DD15, DD16
PART NUMBER(S):
Fleet Products: KB799570-2X (Remanufactured) | Replaces OE: Horton 99A8264, 98A8264, 79A8264, 99A9570-2, 98A9570-2, HOR98A95702, HOR98A9570-2, 99A7204, 79A7204 | Kit Masters 99570-2, KMN20995702, KM N20 995702, KMI995702 | Alliance Truck Parts ABPN20995702, ABP N20 995702 | Freightliner FLT995702 | BorgWarner 010023623
DESCRIPTION:
Model: DriveMaster two-speed fan clutch
Vehicles: Western Star 49X and 4900, 2018-2022 applications
Engines: Detroit Diesel DD13, DD15, DD16
• Belt Configuration: 10PK serpentine
• Back Pulley Diameter: 6.85"
• Overall Length: 7.88"
• Belt Groove Location: 1.98"
• Fan Pilot Diameter: 2.56"
• Fan Blade Stud Length: 0.81"
• Stud Thread Size: 0.375-24 UNF
• Fan Bolt Circle: 3.50"
• Vertical Mounting Distance: 2.83"
• Horizontal Mounting Distance: 8.66"
• Center of JB to Top-Right Mounting Hole: 1.50"
• Fan Center Reference: 12.99"
• Fan Drive Ratio: 1.2:1
• Horton OEM Reference: 98A8264
• Related On/Off Reference: 99A7204 / 79A7204 is the on/off version for compatible new-style journal bracket applications
CROSS-REFERENCE(S):
KB799570-2X, 99A8264, 98A8264, 79A8264, 99A9570-2, HOR98A95702, HOR98A9570-2, 98A9570-2, KMN20995702, KM N20 995702, ABPN20995702, ABP N20 995702, FLT995702, KMI995702, 3443-995702, 99570-2, 99A7204, 79A7204, 010023623, 3443-995702
A cross-reference listing means this part should be a suitable replacement for the part numbers listed. Please confirm all dimensions match your application before installing.
IMPORTANT INSTALLATION NOTES:
✔ Confirm belt style: 10PK serpentine.
✔ Verify back pulley diameter, belt groove location, fan pilot, bolt circle and stud thread before installation.
✔ Confirm fitment for Western Star 49X / 4900 with Detroit Diesel DD13, DD15 or DD16 engine.
✔ Confirm the original unit is two-speed, not on/off, before replacement.
✔ Inspect fan blades, belts, pulleys, air supply lines and solenoid operation before reinstalling a remanufactured clutch.
✔ After installation, confirm two-speed fan clutch engagement, air control response and fan-to-shroud clearance before returning the vehicle to service.
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
