No.21819687 Belt Tensioner For Volvo D13 2017-2021 Drive Belt Tensioner With Pulley Assembly Replaces No.24201573/20739751

OE Number of Belt Tensioner:21819687/24201573/20739751Fitment of Belt Tensioner Assembly: for Volvo D13 2017-2021 for MACK MP8 Truck Engine Specification of Automatic Belt Tensioner Pulley Assembly: Type: Belt Tensioner Material: Metal Other Name: Tensioner Pulley, Drive Belt Tensioner Pulley, Belt Tensioner Include: 1Pc x Belt Tensioner Assembly Feature of Belt Tensioner w/Pulley: Replace the old or broken belt tensioner to avoid noisy tensioner pulley and no longer withstand belt noise. Ensure that the drive belt always maintains the proper tension, supports the belt and guides it to run in a predetermined path, and reduces the vibration and noise generated by the belt during operation. Solid metal for wear resistance, not easy break or deform, ensure longer service life. This is a non-OEM product, accessory only! Signs of A Worn Tensioner: Excessive Belt Slack or Tightness: The tensioner should maintain optimal tension. If the belt feels too loose or too tight, the tensioner may not be functioning correctly. Fluctuating Power or Accessory Malfunctions: lf the alternator, power steering, airconditioning, or other belt-driven accessories seem to work intermittently or lackpower, it could be due to improper belt tension. Tensioner Pulley Wear: The tensioner has a pulley attached to it; if this pulley becomes worn or wobbly, it's a sign that the tensioner assembly may need replacement. Visual Inspection of the Tensioner ltself: Look for signs of hydraulic fluid leakage (for hydraulic tensioners), rust, orcorrosion on the tensioner body. These indicate that it's time for a closer inspection or replacement.