Gates 38767 belt tensioner for the 2015-2017 Peterbilt 389 6-cylinder 12.9L and other vehicles holds the accessory drive belt at working tension. Also called a serpentine belt tensioner, this automatic unit lasted up to 3X longer than competitive aftermarket tensioners in laboratory vibration and contamination tests.
- FleetRunner Heavy-Duty automatic belt drive tensioner
- Patented labyrinth seal keeps contamination out of the internal parts
- Steel pulley with dust shields that protect the internal bearings
- Double row bearings for load capacity
- Round chrome-silicone torsion spring to limit flex-fatigue
- Patented damping mechanism for stability and reduced vibration
Quick facts
- Part: Gates 38767 belt tensioner
- Also called: serpentine belt tensioner
- Fits: 2015-2017 Peterbilt 389 6-cylinder 12.9L and other vehicles
- Position: Alternator, fan
- Material: Steel
- Condition: New
A squealing or fluttering belt, or a rough-sounding pulley, can mean the tensioner is worn. A look at the belt and pulley with the engine off and cool, for cracks, glazing or rust, helps you find the cause before you replace the tensioner. If the tensioner is the cause, this unit replaces it.
Fits
Listed for a wide range of Kenworth and Peterbilt trucks, including the 2014-2017 Kenworth T680 6-cylinder 12.9L and the 2014-2017 Kenworth T800 6-cylinder 12.9L, and each truck takes one. If your truck is not named here, open the "Vehicles it fits" section and check your exact model and engine.
Specifications
Fit and size
- Position: alternator, fan
- Quantity per vehicle: 1
- Pulley outside diameter: 75 mm (2.95 in)
- Bearing bore inside diameter: 30 mm (1.18 in)
- Pulley width: 46 mm (1.81 in)
- Pulleys: 1
- Mounting holes: 1
Build and materials
- Type: automatic belt tensioner assembly
- Belt type: V-ribbed
- Contact surface: smooth/backside
- Pulley flange: none
- Material: steel
- Condition: new
- Country of origin: Canada
In the box
One belt tensioner assembly.
Interchange: 89955 · 1956748
Frequently Asked Questions
Does the Gates 38767 belt tensioner fit the 2015-2017 Peterbilt 389 6-cylinder 12.9L?
Yes. Gates 38767 is listed for the 2015-2017 Peterbilt 389 6-cylinder 12.9L, and each truck takes one. For other models, open the "Vehicles it fits" section.
Does the Gates 38767 come with a new drive belt?
No. The contents are a single belt tensioner assembly, so the drive belt is sold separately.
What size is the pulley on this Gates drive belt tensioner?
Gates 38767 has a steel pulley 75 mm (2.95 in) across and 46 mm (1.81 in) wide, with a 30 mm bearing bore. It contacts the smooth backside of a V-ribbed belt.
Does the Gates 38767 replace number 1956748?
Yes. 1956748 is on the interchange list for Gates 38767, along with 89955.
Does this belt tensioner adjust itself automatically?
Yes. This belt tensioner is a FleetRunner Heavy-Duty automatic unit, and its patented damping mechanism is built for stable tension with less vibration.
