Gates K120476HD | PACCAR MX-13 Fan Drive Belt

Gates K120476HD PACCAR MX-13 Fan Drive Belt

The Gates K120476HD FleetRunner Heavy-Duty Micro-V Belt is a heavy-duty 12-rib serpentine belt designed for qualifying PACCAR MX-13 fan drive applications. Engineered for demanding diesel engine environments, this belt is designed to provide durability, flexibility, stability, and reliable power transmission.

The K120476HD features Gates' heavy-duty EPDM construction and a 12-rib Micro-V design. It has an effective length of 47.72 inches, an outside circumference of 48.25 inches, and a top width of 42 mm. Gates specifically identifies the FleetRunner line as being engineered for extreme operating temperatures and demanding heavy-duty drives. citeturn0search1

This belt is commonly associated with qualifying PACCAR MX-13 diesel engine fan applications, including select Peterbilt and Kenworth models. Always verify the existing belt, engine application, belt routing, and part number before ordering. citeturn0search0

Key Features

• Gates K120476HD FleetRunner Heavy-Duty Micro-V Belt
• Designed for qualifying PACCAR MX-13 fan drive applications
• 12-rib serpentine / Micro-V design
• 47.72" effective length
• 48.25" outside circumference
• 42 mm top width
• Heavy-duty EPDM construction
• Polyester cord construction
• Designed for extreme operating temperatures
• Resists cracking and wear
• Designed for demanding heavy-duty belt drives
• Helps provide flexibility and load-carrying capability

Specifications

• Brand: Gates
• Part Number: K120476HD
• Product Line: FleetRunner Heavy-Duty Micro-V
• Product Type: V-Ribbed / Serpentine Belt
• Application: PACCAR MX-13 Fan Drive
• Rib Count: 12
• Section: K
• Effective Length: 47.72"
• Effective Length: 1212 mm
• Outside Circumference: 48.25"
• Outside Circumference: 1226 mm
• Top Width: 1.647"
• Top Width: 42 mm
• Material: EPDM
• Cord Material: Polyester
• Grade: OE Improved

Common Applications

The Gates K120476HD is used in qualifying PACCAR MX-13 diesel engine fan drive applications. Published application information includes select:

• Peterbilt 579
• Peterbilt 567
• Peterbilt 587
• Peterbilt 365
• Peterbilt 367
• Peterbilt 384
• Kenworth T680
• Kenworth T880
• Kenworth T800
• Kenworth T660
• Kenworth W900

Application years and configurations vary by vehicle and engine. The published application data identifies the K120476HD with PACCAR MX-13 diesel engine fan applications, so fitment should always be confirmed before ordering. citeturn0search0

OEM & Cross Reference Part Numbers

The Gates K120476HD is cross-referenced with several heavy-duty belt part numbers, including:

• PACCAR: 1956747
• PACCAR: D841003121212
• Dayco: 5120477
• Goodyear: 1120477
• ContiTech: 4120476FX
• Continental: 4120476F
• NAPA: 25-120476
• NAPA: 25-120476HD
• ACDelco: 12K476
• Metric: 12PK1212

Additional cross-reference listings include 12PK1210, 12PK1214, 12PK1211, 12PK1215, and D841000121212. Cross-reference numbers are provided for identification purposes only; always verify the exact application before ordering. citeturn0search0turn0search4

Why Replace Your Fan Drive Belt?

The fan drive belt is an important component of the engine accessory drive system. A worn, cracked, glazed, or damaged belt can cause belt noise, slippage, reduced accessory performance, or belt failure.

On a PACCAR MX-13 engine, a properly functioning fan drive system is important for maintaining the engine cooling system's ability to provide airflow when required. Regular belt inspection and replacement can help prevent unexpected downtime and roadside failures.

Gates recommends inspecting the belt drive system and notes that worn or failed tensioners can contribute to symptoms such as squealing, vibration, and excessive belt wear. citeturn0search1

Why Choose Gates FleetRunner K120476HD?

The Gates K120476HD FleetRunner is engineered specifically for demanding heavy-duty belt-drive environments. Its EPDM construction is designed to resist cracking and wear while maintaining flexibility, stability, and load-carrying capability under prolonged operating temperatures.

For qualifying PACCAR MX-13 fan drive applications, the K120476HD provides a heavy-duty replacement option from Gates' FleetRunner line. citeturn0search1

Fan Drive Belt Fitment Verification

Verify fitment before ordering. PACCAR MX-13 engines can use different belt configurations depending on engine, chassis, model year, and accessory arrangement.

Compare the existing belt's part number, rib count, effective length, width, belt routing, and engine application before installation.

If the application is uncertain, provide the VIN or engine serial number so the correct belt application can be confirmed.