Product Description
104778X – FD-3 CUMMINS FAN CLUTCH
PART NUMBER(S):
Fleet Products: 104778X (Remanufactured) | OE: 104778, 104778RX, 104777
DESCRIPTION:
Model: FD-3 Bendix-Style Fan Clutch
Vehicles: Cummins Diesel Applications
• Fan Pilot Diameter: 2.56"
• Back Pulley Diameter: 4.9"
• Drive Type: Spring-engaged pneumatic
• Friction Material: Kevlar-impregnated surface
• Bearings: High-load heat-resistant design
• Balanced for vibration-free performance
• Precision remanufactured to OEM FD-3 specs
Applications:
Used in Cummins-powered heavy-duty trucks and vocational platforms requiring Bendix-style FD-3 fan clutches. Ideal for fleet, mixed-route, and urban trucking environments with high torque demand and frequent clutch engagement cycles.
CROSS-REFERENCE(S):
104778, 104778RX, 104777, 104777RX, 104777X, 104778X, ABP N20 104778X, ABPN20104778X, FLT104777X, FLT104778X, FLT104778GTN, KMI104778X, KM N20 104778X, KMN20104778X, 3443-104778X, 104941
A cross-reference listing means this fan clutch should be a suitable replacement for the part numbers listed. Please confirm all dimensions match your application before installing.
IMPORTANT INSTALLATION NOTES:
✔ Torque locknut to approximately 90 ft-lbs and align lock tabs during tightening
✔ Use original lock washers on reassembly to maintain secure locking
✔ Do not exceed 100 lbs of force when pressing bearing races
✔ Adjust fan belt tension according to manufacturer specifications
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 | Email: sales@fleet-products.com
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