Gates K120878 serpentine belt for the 2006-2007 Kenworth W900 6-cylinder 14.9L is one of the Gates ribbed belts that carry engine power to the fan and alternator. This Gates Micro-V serpentine belt has a polyester cord.
- Gates Micro-V precision-fit belt design
- Special belt construction that eliminates belt noise, reduces tension loss and solves problem drive applications
- EPDM rubber construction that resists cracking on the rib surface
- 12 ribs with a 42 mm top width and a K cross section
Quick facts
- Part: Gates K120878 serpentine belt
- Fits: 2006-2007 Kenworth W900 6-cylinder 14.9L
- Position: Fan and alternator
- Material: EPDM
- Condition: New
Cracked ribs, squealing or a slipping fan or alternator drive can mean this belt is worn, though a weak tensioner or a worn pulley bearing can be behind them too, so find the cause before you replace it. This listing is one belt, and the 2006-2007 Kenworth W900 6-cylinder 14.9L takes one.
Fits
This serpentine belt is a direct-fit replacement for the 2004 and 2006-2007 Kenworth W900 6-cylinder 14.9L, and it meets or exceeds all specifications from the original equipment manufacturer.
Specifications
Fit and size
- Position: fan and alternator
- Quantity per vehicle: 1
- Effective length: 2231 mm (87.82 in)
- Outside circumference: 2245 mm (88.387 in)
- Top width: 42 mm (1.647 in)
- Ribs: 12
- Cross section designation: K
Build and materials
- Type: automotive V-ribbed belt (standard)
- Material: EPDM
- Cord material: polyester
- Condition: New
- Country of origin: Mexico
Installation notes
- Tensioner replacement is recommended with the belt, if the vehicle is equipped with one.
Interchange: 25-120878 · 25-120878HD
12K878 · K120878HD · 4120878 · 878K12MK · 5120880 · 880K12 · 4120878APDYC · D11084210 · D8410001122230 · D8410006122230 · 1120878 · 12PK2228 · 12PK2229 · 12PK2230 · 12PK2231 · 12PK2232 · 12PK2233 · 12PK2234
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
12K878, K120878HD, K120878, 4120878, 878K12MK, 5120880, 880K12, 4120878APDYC, D11084210, D8410001122230, D8410006122230, 1120878, 12PK2228, 12PK2229, 12PK2230, 12PK2231, 12PK2232, 12PK2233, 12PK2234, 25-120878, 25-120878HD
Frequently Asked Questions
Is the Gates alternator belt K120878 right for the 2006-2007 Kenworth W900 6-cylinder 14.9L?
Yes. Gates K120878 is a direct-fit replacement for the 2004 and 2006-2007 Kenworth W900 6-cylinder 14.9L and drives the fan and alternator.
What size is the Gates K120878 belt?
The Gates K120878 has an effective length of 2231 mm (87.82 in), a top width of 42 mm and 12 ribs, with a K cross section.
Is this serpentine belt made of EPDM rubber?
Yes. This belt is EPDM with a polyester cord, and the EPDM rubber resists cracking on the rib surface.
Should the tensioner be replaced when fitting Gates drive belts like the K120878?
Replacing the tensioner is recommended along with this belt, if the vehicle is equipped with one.
Is Gates K120878 interchangeable with the 12PK2230 belt?
Yes. 12PK2230 is one of the numbers this belt replaces, along with 25-120878 and 12K878.
