Description
KB798621X - DRIVEMASTER FAN CLUTCH - FREIGHTLINER / WESTERN STAR DD13, DD15, DD16
PART NUMBER(S):
Fleet Products: KB798621X (Remanufactured) | Replaces OE: Horton 79A8621, HOR79A8621, HOR 79A8621, HIOR 79A8621, 98A8621, 988621, 99A8621, 998621, 98A9650, 99A9650, 79A7201, 98A7201, 99A7201, 79A7249, 98A7249, 79A8262, 79A8621-2, 010023866, 010023867, 9910139, 9910139-2, K798621, R798621, ZBH79A8621, 79A8621RMAN
DESCRIPTION:
Model: DriveMaster DM Advantage on/off fan clutch
Vehicles: Freightliner Coronado, Cascadia and Cascadia 125 BBC 2007-2017; Western Star 4900 2007-2017; Daimler Truck 2008-2010; Terex/Advance Mixer mobile crane 2010-2012
Engines: Detroit Diesel DD13, DD15, DD16
• Belt Configuration: 10PK serpentine
• Back Pulley Diameter: 6.81"
• Overall Length: 9.13"
• 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"
• Fan Drive Ratio: 1.2:1
• Fan Center: 11.50"
• Fan Blade: 11 blades, 32.01" fan diameter
• Fan Blade Service Reference: 996813252
• Horton OEM Reference: 98A8621
• Service Reference: 79A8621 applies to 2017 and older model years where specified. 79A7201 is a later service reference due to mounting bracket clearance
CROSS-REFERENCE(S):
Kit Masters 98621, 98621-2, 986212, KMN2098621, KM N20 98621, KMI98621 | Alliance ABP N20 98621, ABPN2098621 | Mack 3912-79A8621 | Other FLT98621, 3443-98621
A cross-reference listing means this part should be a suitable replacement for the part numbers listed.
IMPORTANT INSTALLATION NOTES:
✔ Verify back pulley diameter, belt groove location, fan pilot, bolt circle and stud thread before installation.
✔ Confirm fitment for Freightliner or Western Star applications with Detroit Diesel DD13, DD15 or DD16 engines.
✔ Check mounting bracket clearance, especially where 79A7201 or 79A7249 service references are involved.
✔ Inspect fan blades, belts, pulleys, air supply lines and solenoid operation before reinstalling a remanufactured clutch.
✔ After installation, confirm fan clutch engagement, air control response and fan-to-shroud clearance before returning the vehicle to service.
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.
Warranty Information
