Vespa smallframe engine strip down and rebuild. 10. Replacing seals.
There are three oil seals in a smallframe Vespa engine. One that
seals the crank from the clutch chamber, one that seals the mainshaft
at the flywheel and one that seals the rear axle at the hub. Whenever
you rebuild the engine you should always renew the seals. It's false
economy not to, and when you take an engine apart you never know
what state they will be in.The hub seal and the flywheel seal can
actually both be replaced with the engine in the scooter as they
can be accessed from the outside, but the clutch side seal can only
be replaced with the engine split and the crank out of the scooter.
When pressing a new seal into place it's important to make sure
it goes in the right way and to make sure it goes in evenly. Here's
where the clutch side one goes
And the flywheel side:
And the rear hub seal:
In each case the face with the spring in faces into
the body of the engine.