Description
KB799504X – DRIVEMASTER FAN CLUTCH (KENWORTH / PETERBILT – PACCAR PX-8)
PART NUMBER(S):
Fleet Products: KB799504X (Remanufactured) | OE: Horton 79A9504, 99A9504; Kit Masters 989504
DESCRIPTION:
Model: Horton DriveMaster On/Off
Vehicles: Kenworth T300 (2007–2010), Peterbilt 330, 335, 335 FEPTO, 340, 340 FEPTO (2007–2010)
Engines: PACCAR PX-8
• Back Pulley Diameter: 5.78″
• Overall Length: 6.85″
• Belt Configuration: 8PK
• Belt Groove Location: 2.25″
• Fan Pilot Diameter: 2.56″
• Fan Blade Bolt Circle: 3.5″
• Fan Blade Stud Length: 1.07″ (3/8-24 thread)
• Vertical Mounting Distance: 2.01″
• Horizontal Mounting Distance: 4.41″
• Application Use: Medium-duty trucks with PX-8 engines needing OE-correct cooling performance.
Applications:
Built for Kenworth and Peterbilt PX-8 trucks (2007–2010). This Horton Drivemaster clutch ensures proper cooling in vocational, regional haul, and delivery applications. Designed to handle daily stop-and-go demands while protecting engine efficiency.
CROSS-REFERENCE(S):
799504, 799504-2, 799627, 79A9504, 989504, 989627, 999504, 999627, ABP N20 99627, ABPN2099627, F17-1014M12, F171014M12, FLT99627, KM N20 99627, KMN2099627, RX799627RMANRF, F17-6005-8011, F1760058011, P999504, K799504, R799504, 99504, ABPN2099504, ZBH999504, FC799504, FLT99504, RC799504A cross-reference listing means this part is a suitable replacement for the part numbers listed. Please confirm all dimensions match your application before installing.
IMPORTANT INSTALLATION NOTES:
✔ Confirm fan bolt pattern and pulley size before installation
✔ Verify 1.43:1 drive ratio matches original system
✔ Replace all worn O-rings or seals
✔ Torque to OEM specs and road test engagement
✔ Ensure proper belt alignment with PX-8 configuration
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
