Keep every accessory spinning and silence belt squeal with the Gates FleetRunner Heavy-Duty Automatic Belt Drive Tensioner Assembly (P/N 38506). This automatic tensioner maintains steady tension on the V-ribbed belt that drives the alternator, air conditioning, fan, and hub, and it drops in as a direct-fit replacement for heavy-duty applications such as the 2000-2003 Ford F-650 and F-750 [L6-7.2L], the 1998-2004 Freightliner Century Class [6-12.0L], and the 2000-2004 Freightliner Argosy — one of 261 listed applications, so check the Buyer's Guide tab for the full list.
Part of the Gates belt drive system, the FleetRunner is engineered to exceed demanding OEM requirements; in lab testing under extreme peak-to-peak vibration and contamination, FleetRunner heavy-duty tensioners lasted up to 3X longer than competitive aftermarket tensioners.
- Double-row bearings: carry more load and last up to 3X longer than two individual bearings.
- Patented labyrinth seal: keeps contamination out of the internal parts for long service life.
- Steel pulleys with dust shields: protect the internal bearings from contamination.
- Chrome-silicone round torsion spring: less flex-fatigue than flat-spring designs.
- Patented damping mechanism: provides stability and reduces vibration, helping extend the life of the belt, tensioner, and other accessory drive components.
The assembly uses a smooth (backside) flat pulley measuring 75 mm (2.95 in) outside diameter and 40 mm (1.57 in) wide over a 30 mm (1.18 in) bearing bore, with a single mounting hole. If a worn tensioner is the cause of belt squeal, chirp, or slack, replacing it restores proper belt tension and alignment. It ships with the tensioner assembly and mounting bolt. Country of origin: Canada.
