Description
KB799855X – HORTON DRIVEMASTER FAN CLUTCH (FREIGHTLINER / CATERPILLAR C12 & C13, WESTERN STAR, STERLING)
PART NUMBER(S):
Fleet Products: KB799855X (Remanufactured) | OE: Horton 79A9855, Horton 99A9855, Kit Masters 99855, CAT 549-9527
DESCRIPTION:
Model: Horton DriveMaster On/Off (Remanufactured)
Vehicles: Freightliner Century, C120, CT120, ST120, Columbia (2007–2010); Sterling A/L Line, L Line (2007–2010); Western Star 4900 (2007–2010) with Caterpillar C12 & C13 engines
• Belt Configuration: 12PK
• Belt Groove Location: Front
• Fan Pilot Diameter: 2.56″
• Fan Blade Bolt Circle: 3.5″
• Fan Blade Studs: 6x, 3/8-24 Thread, 0.81″ Long
• Pulley Diameter: 8.55″
• Overall Length: 6.56"
• Fan Center: Standard Horton
• Weight: 42.1 lbs (Remanufactured assembly)
• Construction: Remanufactured to OEM specifications with rugged thermal controls
• Durability: Engineered for severe-duty use with vibration-free, balanced rotation
• Performance: High-reliability thermal management with reduced drag and maximized uptime
Applications:
Is this Horton DriveMaster fan clutch the right fit for your Caterpillar C12 or C13-powered truck✔ Yes—built for Freightliner, Western Star, and Sterling platforms from 2007–2010, this reman fan clutch provides direct OEM replacement, fuel-efficient on/off control, and long-life durability in demanding fleet operations.
CROSS-REFERENCE(S):
1000-799586, 1000799586, 3443-99855, 3443-998552, 799586, 79A8200, 79A8202, 79A9586, 79A9586RMAN, 79A9659, 79A9782, 989855, 98A8200, 98A9586, 98A9659, 98A9782, 98A9855, 98A9886, 99586, 99782, 99782-2, 997822, 999855, 99A8200, 99A9586, 99A9586HOR, 99A9659, 99A9782, 99A9855, ABP N20 997822, ABP N20 99855, ABP N20 998552, ABPN2099855, ABPN20998552, F17-1014M01, F17-1030-001, F17-1031-001, F17-6009M22, F17-6009M34, F17-6014M22, F17-6014M34, F17-6017M03, F171014M01, F171030001, F176009M22, F176009M34, F176014M22, F176014M34, FLT997822, FLT99855, FLT998552, HOR79A9586, KM N20 99855, KM N20 998552, KMI99855, KMI998552, KMN2099855, KMN20998552, RC799586, ZBH79A9586, ZBH99A9586, P99A9586, R799586, K799586, NAVISTAR FLT99586, 3912-99A9855, 549-9527, HOR 99A9855, HOR99A9855, 989855, 999855, K799586, R799586, ZBH79A9856
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 correct belt profile (12PK) and pulley alignment before install
✔ Verify vertical mount distance matches OEM bracket system
✔ Replace all fan studs and bolts if corroded or stretched
✔ Torque to Horton specifications to ensure proper fan engagement
✔ For CAT C12 and C13 – match by engine serial prefix where possible
Drivemaster On/Off 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.
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Warranty Information
