Product Description
KB799552X – DRIVEMASTER FAN CLUTCH (VOLVO / DETROIT DIESEL D13)
PART NUMBER(S):
Fleet Products: KB799552X (Remanufactured) | OE: Horton 99A9552, 98A9552, 99A9644, 98A9644, 79A9552, 79A9644 | Kit Masters 99552 | 21251045, 85115602, 21434730, 20883819, 22113052, 22113077 Volvo, 21251045, 43MH58M Mack
DESCRIPTION:
Model: Horton DriveMaster
Vehicles: Volvo VNL, VNM (2007–2018), Mack Anthem, CXU, CXU613, CX613 (2007–2020)
Engines: Detroit Diesel D13, Mack MP8
• Back Pulley Diameter: 7.87″
• Fan Pilot Diameter: 2.56″
• Bolt Circle: 3.5″
• Center of JB to Top-Right Mounting Hole: 4.39″
• Noise Reduction: Quiet operation at highway speeds
• Fan mount: 2.56'' Pilot, 3.5'' Bolt Circle, 6x, 3/8-24 Thread, 1.07'' Long
Applications:
Purpose-built for Volvo D13 and Mack MP8 platforms, this remanufactured Horton DriveMaster fan clutch provides OE-level cooling efficiency with reduced drag for better fuel savings. Reliable for linehaul and vocational fleets that demand long-life cooling under high load conditions.
CROSS-REFERENCE(S):
1000-799644, 1000-799644-2, 1000799644, 10007996442, 20883819, 21192240, 21210845, 21251045, 21434730, 21508301, 21596045, 21925087, 22113052, 22113077, 3443-99552, 3443-995522, 3815975, 391279A96442, 40MH4103M, 43MH58M, 799644, 799644-2, 79A9552, 79A9552-2, 79A95522, 79A9643-2RMAN, 79A96432RMAN, 85111813, 85115602, 85139329, 85147377, 98A9552, 98A9552-2, 98A95522, 98A9644, 98A9644-2, 98A96442, 99552, 995522, 99A9552, 99A9552-2, 99A95522, 99A9644, 99A9644-2, 99A96442, ABP N20 99552, ABP N20 995522, ABPN2099552, ABPN20995522, FC799644, FC7996442, FLT99552, FLT995522, HOR79A9644, HOR79A96442, HOR99A9644, KM N20 99552, KM N20 995522, KMI99552, KMI995522, KMN2099552, KMN20995522, RC799644, RC7996442, ZBH79A9644, ZBH79A96442
A cross-reference listing means this part is a suitable replacement for the part numbers listed. Please confirm all ports and dimensions match your application before installing.
IMPORTANT INSTALLATION NOTES:
✔ Confirm pulley diameter and fan pilot dimensions before installing
✔ Clean and inspect all hub and mounting surfaces
✔ Torque fan blade studs and hub fasteners to OE specification
✔ Replace corroded or worn fasteners for reliable fit
✔ Verify belt alignment and spacing before startup
Drivemaster On/Off Repair Kits:
- Minor Seal Repair Kit: 294346
- Major Repair Kit: 294351
- Super Repair Kit: 295568, 295575, 299985, Q299999 (Universal)
- Lining Kit: 294349
SOLD AS REMANUFACTURED – CORE RETURN REQUIRED
Built to OEM standards — thoroughly cleaned, inspected, and tested to ensure durability, performance, and reliability in demanding applications.
SUPPORT & ORDERING
For technical support, installation guidance, or to confirm fitment, call 1-877-243-0442 or email sales@fleet-products.com
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