Part Number(s): R133703, T428703 | Also Known As: AR133703, AAR133703, AMR135823, A751K8 | Metric Code: 8PK1907
Weight: 0.67 lbs
Application: Engine fan drive belt - drives the engine cooling fan and accessory drive system on John Deere 850J-II dozers, 644/724 series wheel loaders, and 5000 series utility tractors
Condition: Aftermarket replacement part
Type: K Micro Rib (Poly-V / Serpentine) belt
Material: Polyester cord construction
Color: Black
Pitch Length: 75.1"
Outside Length: 75.85"
Width: 8 Rib
Thickness: 0.18"
Serial Number / Configuration Notes for 5000 Series Tractors: Confirm cab, serial number, and configuration before ordering:
5083E, 5093E Limited, 5101E - Fan Drive With Cab, Serial Number 339999 and below
5083EN, 5093EN, 5101EN - Fan Drive With Cab, Serial Number 369999 and below
5425N - Fan Drive With Cab, Straddle Mount configuration only
5425, 5425H, 5425HC, 5625, 5625HC, 5725H - Orchard configuration only
5525 - With Cab only
5603, 5725 - Fan Drive With Cab, 1907.5mm wheelbase
Common Use Case: Use when the fan drive belt is cracking, glazing, squealing, or has broken - a worn or failed fan belt will cause engine overheating across all applicable John Deere dozer, wheel loader, and 5000 series tractor models.
Why Choose Broken Tractor
One Belt Number, Multiple Machine Lines - This belt covers John Deere's 850J-II dozer, 644/724 series wheel loaders, and multiple 5000 series utility tractor configurations
K Micro Rib Serpentine Belt Construction - Multi-rib poly-V design provides superior grip, reduced slip, and efficient fan drive power transfer
Fast Shipping from a U.S.-Based Team - Orders are processed and shipped by our knowledgeable U.S.-based staff
$28.00/ea
Shipping calculated at checkout. If any item in your order is temporarily unavailable, we'll contact you to arrange a back-order or refund — whichever you prefer.
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Did you accidentally purchase the incorrect part? We offer returns and exchanges here at Broken Tractor. To proceed with a return, please call us toll free, and we will provide you with return authorization and a step by step return process for your convenience. We are more than happy to help you exchange your part for the correct one! Give us a call at 1-800-909-7060 and we would be pleased to help you.