Gates 38585 belt tensioner for the 2010-2017 Mack Titan 6-cylinder 16.1L and other vehicles holds the accessory drive belt at working tension. Also sold as a serpentine belt tensioner, it has a patented design for belt alignment and tension.
- FleetRunner heavy-duty automatic belt tensioner line
- Patented labyrinth seal that keeps contamination out of the internal parts
- Steel pulley with dust shields that protect the internal bearings from contamination
- Double row bearings that carry more load
- Chrome-silicone round torsion spring to limit flex-fatigue
- Patented damping mechanism for stability and reduced vibration
Quick facts
- Part: Gates 38585 belt tensioner
- Also called: serpentine belt tensioner
- Fits: 2010-2017 Mack Titan 6-cylinder 16.1L and other vehicles
- Position: Alternator and air conditioning, alternator, hub
- Material: Steel
- Condition: New
Belt squeal, a slipping belt or a wobbling pulley can mean the tensioner is wearing out. A worn belt, a failing idler or accessory pulley, or a weak alternator or A/C compressor can be behind these signs too, so find the cause before buying.
Fits
The 2004-2008 Volvo VNL 6-cylinder 12.1L, the 2006-2017 VNL 6-cylinder 16.1L and the 2010-2017 Mack TD700 6-cylinder 16.1L take this belt tensioner, one per vehicle, and so do more Mack and Volvo models. Open the "Vehicles it fits" section to find your exact model and engine.
Specifications
Fit and size
- Position: alternator and air conditioning, alternator, hub
- Quantity per vehicle: 1
- Outside diameter: 75 mm (2.95 in)
- Bearing bore inside diameter: 30 mm (1.18 in)
- Width: 40 mm (1.57 in)
- Mounting holes: 2
Build and materials
- Material: Steel
- Belt type: V-ribbed
- Pulley contact surface: smooth, belt backside
- Pulley: 1, not flanged
- Condition: New
- Country of origin: Canada
In the box
One belt tensioner assembly.
Interchange: GT38585 · 89457 · 49572 · 910560A · 910560 · 20966526 · 21422767 · 8149855
This part cross-references / interchanges with the following part numbers:
38585, GT38585, 89457, 49572, 910560A, 910560, 20966526, 21422767, 8149855
Frequently Asked Questions
Is this the right Volvo VNL belt tensioner for a 2004-2008 truck with the 6-cylinder 12.1L?
Yes. Gates 38585 fits the 2004-2008 Volvo VNL 6-cylinder 12.1L and the 2006-2017 VNL 6-cylinder 16.1L, one per vehicle.
Does Gates 38585 come as a full tensioner assembly with its pulley?
Yes. Gates 38585 is one belt tensioner assembly with a single pulley.
Which side of the belt does this Gates drive belt tensioner pulley run on?
Its pulley has a smooth contact surface for the back of a V-ribbed belt. The listed outside diameter is 75 mm (2.95 in) and the width is 40 mm (1.57 in).
Can a worn belt tensioner make the accessory belt flutter?
Yes, belt flutter or chatter can be a sign of a worn tensioner, and a rough-turning pulley is another; a shop can test the drive with the engine running.
Does Gates 38585 replace part number 20966526?
Yes. Number 20966526 is one of the numbers Gates 38585 replaces; the others are on the Interchange line.
