Product Description
HORTON DRIVEMASTER TWO-SPEED FAN CLUTCH REMAN
PART NUMBER(S):
79A9644 (Reman), 99A9644 (New OEM)
Kit Master: 99644
DESCRIPTION:
Model: DriveMaster Two-Speed
Engines: Mack MP8, MP10; Volvo D13
Vehicles: Mack CXU, CXU613, CX613, Anthem (2007–2020); Volvo VNL, VNM (2007–2018)
- Fan Drive Ratio:16:1
- Number of Blades: 11
- Fan Diameter:01 in
- Back Pulley Diameter:87 in
- Front Pulley Diameter:00 in
- Belt Configuration: 12PK
- Belt Groove Location:48 in
- Fan Pilot Diameter:56 in
- Fan Blade Stud Length:07 in
- Stud Thread Size: .375-24 UNF
- Bolt Circle:50 in
- Overall Length:13 in
- Vertical Mounting Distance:21 in
- Horizontal Mounting Distance:73 in
DM Repair Kits:
- Minor Seal Repair Kit: 294346
- Major Repair Kit: 294351
- Super Repair Kit: 295568, 295575, Q299999 (Universal)
Applications: Mack and Volvo HEAVY DUTY trucks with MP8, MP10, and D13 engines
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.
010021884, 20883819, 21192240, 21251045, 21434730, 21508301, 22113052, 3912-79A96442, 43MH58M, 704549AT, 79A9644, 79A9644-2, 79A96442, 85115602, 9810069, 9810241, 98A9552-2, 98A9644, 98A9644-2, 9910069, 9910241, 996813252, 996813892, 996813932-001, 99A9552, 99A9552-2, 99A9644, 99A9644-2, 99a9552, 99a9644, FC7996442, RX79A9644-2RMAN, RX79A9644-2RMANRF, RX79A96442RMAN, RX79A96442RMANRF
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:
Always check the fan clutch for wear or damage before installation
Ensure proper air system pressure for clutch engagement
Torque all mounting bolts to manufacturer specifications
Verify belt alignment and tension to avoid premature failure
Replace any worn seals or O-rings to prevent leaks
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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