Product Description
HORTON DRIVEMASTER REMAN FAN CLUTCH
PART NUMBER(S):
HORTON OEM: 79A9646, 98A9646, 99A964
BEHR: 21254045
BORGWARNER: 21192250, 21508309
VOLVO: 20883819, 21192248, 21251045, 21436410, 21508309, 21596051, 22113059, 22113079, 85115602, 85139330
MACK: 43MH58M
NAVISTAR: FLT99554
DESCRIPTION:
Model: Horton DriveMaster (Reman)
Engines: Detroit Diesel D16
Vehicles: Volvo and Mack commercial trucks (Class 8)
- Back Pulley Diameter: 7.4 in
- Overall Length: 6.89 in
- Belt Configuration: 12PK
- Belt Groove Location: 1.48 in
- Bolt Circle: 3.5 in
- Fan Pilot Diameter: 2.56 in
- Fan Blade Stud Length: 1.07 in
- Stud Thread Size: .375-24 UNF
- Vertical Mounting Distance: 7.21 in
- Horizontal Mounting Distance: 6.73 in
- Center of JB to Top Right Mounting Hole: 2.82 in
- Construction: Built for high-load, high-heat use with low drag when disengaged
- Performance: Meets or exceeds OEM cooling and durability standards
DM Repair Kits:
- Minor Seal Repair Kit: 294346
- Major Repair Kit: 294351
- Super Repair Kit: 295568, 295575, Q299999 (Universal)
Applications:
Designed for long-haul Volvo and Mack trucks running Detroit Diesel D16 engines, this reman Horton DriveMaster fan clutch delivers high-efficiency thermal control, reduced parasitic loss, and rugged reliability in demanding Class 8 fleet operations.
SOLD AS REMANUFACTURED – CORE RETURN REQUIRED
Built to OEM standards — thoroughly cleaned, inspected, and tested to ensure durability, performance, and reliability in demanding applications.
CROSS-REFERENCE(S):
Confirm whether your system uses a single-speed or two-speed fan clutch.
20883819, 21251045, 21436410, 21508309, 21596051, 22113079, 3443-99554, 3443-995542, 43MH58M, 79A9554, 79A9554-2, 79A9646, 79A9646-2, 85115602, 85139330, 98A9554-2, 98A9646-2, 98a9554, 98a9646, 99A9554-2, 99A9646-2, 99a9554, 99a9646, ABP N20 99554, ABP N20 995542, ABPN2099554, ABPN20995542, FLT99554, FLT995542, KM N20 99554, KM N20 995542, KMI99554, KMI995542, KMN2099554, KMN20995542
A cross-reference listing means this compressor should be a suitable replacement for the part numbers listed. Please confirm all dimensions match your application before installing.
INSTALLATION NOTES:
>Verify vertical mounting dimensions and bolt alignment
>Inspect fan studs and threads before installation
>Confirm pilot diameter and pulley fitment
>Use torque specs provided by OEM
>Ensure belt tension is calibrated to 12PK configuration
SUPPORT & ORDERING
For technical support, installation guidance, or to confirm fitment, call 1-877-243-0442 or email sales@fleet-products.com
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