Product Description
KB790021X HORTON S ADVANTAGE FAN CLUTCH REMAN
FOR CUMMINS L10, M11, AND N14 ENGINES – PETERBILT, VOLVO
PART NUMBER(S):
79A0021 (Reman), 99A0021 (New OEM)
Kit Master: 90021
DESCRIPTION:
Horton DM Advantage fan clutch designed for heavy-duty diesel engine cooling systems
Engineered for optimal thermal management, enhancing fuel efficiency and reducing engine wear
Remanufactured units (79A0021) meet or exceed OEM specifications, ensuring reliability and performance
New units (99A0021) offer the latest in fan clutch technology for improved durability
Style: Horton S and HT/S Series, with Steel Front Friction Plate
Friction Plate: 7.5 in.
Fan Pilot: 5 in.
BACK PULLEY DIAMETER: 4.98 IN
APPLICATIONS:
Peterbilt / Cummins L10
Peterbilt / Cummins M11
Volvo / Cummins N14
Belt Groove: 8K
Description: Minor Seal Repair Kit use 994205, Major Repair Kit use 994315, Super Repair Kit use 994307, Model S: Slip Type, Air Engaged, PFD: Piston Friction Disc
CROSS-REFERENCE(S):
✔ Confirm whether your system uses a single-speed or two-speed fan clutch.
Two-speed part numbers typically end with "2" or “XX-2”
3912-99A0021, 3912-99A0021-2, 79A0021, 79A0021-2, 79A0021RMAN, 98A0021, 98A0021-2, 99A0021, 99A0021-2, ABP N20 14256, ABP N20 24256, ABP N20 990021, ABP N20 9900212, FLT14256, FLT24256, FLT990021, FLT9900212, HOR 79A0021, HOR 79A0021-2, HOR 99A0021, HOR 99A0021-2, HOR79A0021, HOR79A0021-2, HOR99A0021, HOR99A0021-2, ZBH99A0021, ZBH99A0021-2
A cross-reference listing means this compressor should be a suitable replacement for the part numbers listed. Please confirm all ports and dimensions match your application before installing.
INSTALLATION NOTES:
✔ Always inspect the pulley, bracket, and fan blades for wear or damage before installing the replacement clutch
✔ Confirm air system pressure is within OEM specification to ensure proper engagement
✔ Torque all mounting hardware to Horton-recommended values
✔ Replace worn O-rings and gaskets during installation to avoid air leaks
✔ Ensure correct belt alignment and tension to prevent premature failure
SUPPORT & ORDERING
For technical support, installation guidance, or to confirm fitment, call 1-877-243-0442 or email sales@fleet-products.com and reference Code WEB01.
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