76768 Lycoming Lockwasher-Alt. Idl. Pulley Br

Description

Technical Description – Lycoming Part No. 76768

Part Name: Lockwasher – Alternator Idler Pulley Bearing (Alt. Idl. Pulley Br)
Manufacturer: Lycoming Engines
Part Number: 76768

Description

The Lycoming 76768 Lockwasher is a precision locking washer used in the alternator idler pulley bearing assembly on various Lycoming aircraft piston engines. Its primary function is to prevent the retaining locknut from loosening due to engine vibration, thermal cycling, and rotational loads.

The lockwasher is installed between the idler pulley bearing assembly and the retaining locknut, providing a mechanical locking action that maintains the specified bearing preload and ensures reliable operation of the alternator belt drive