The Gear Lever is the most likely part to wear on clippers and should be replaced regularly.
Transfrers drive from the clippers to the blade.
Note:
When carrying out repairs on your clipper it is always worthwhile disconnecting the power supply before fitting your replacement parts. please do not force any spares into place as this may cause damage to the products.
Carrying out repairs may void any warranties from your suppliers please read their warranty or guarantee information before commencing a repair.