What makes up a Litens Accessory Drive Belt Tensioner?
PULLEY BOLT: Fastens pulley to arm. In some cases can also be used as a lift feature for belt installation.
DUST SHIELD: Prevents contaminants from entering pulley ball bearing.
BALL BEARING: Maintenance free and sealed for life.
PULLEY: Steel or plastic construction, depending on application. Due to belt length considerations, pulley diameters are application specific.
FRONT PLATE: Retains the complete tensioner assembly. Due to mechanical staking feature, tensioners are non-serviceable and cannot be disassembled safely.
THRUST WASHER: Provides additional damping and alignment.
ARM: Robust and precision aluminum diecasting. Transmits torque from spring to pulley to provide constant belt tension. Arm also provides environmental protection for internal components.
PIVOT BUSHING: Self-lubricating, highly wear resistant polymer component. Function is to ensure proper tensioner arm alignment relative to belt and counters tilting.
SPRING: Critical part of tensioner. Designed to provide constant, trouble-free tension to belt for life of tensioner. Round wire design not affected by corrosion or coil-to-coil contact. Does not require a PTFE filler strip to prevent spring lock-up.
SPRING SUPPORT/DAMPING ELEMENT: Provides primary damping for smooth tensioner and accessory drive system operation. Damping varies with spring torque for consistent level of damping throughout operating range. Engineered, highly wear resistant polymer.
SPINDLE or BRACKET: Robust and precision aluminum diecasting with integral locating pin. Keeps the arm ‘true’ to belt. Provides a pivot center for arm and anchors spring. Ensures angular alignment or proper placement on engine. Other accessories or passages for engine coolant may be integrated
CAST LOCATING PIN: Incorporated into the diecasting for exact Original Equipment fit and accuracy. The purpose of the pin is to accurately locate the tensioner on the engine and does not have torque transmitted through it, after the mounting bolt is torqued down. Represents typical construction