Hasler IM-460 User Manual page 198

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4
Take off the
sponge retainer
keep its direction.
Remove the sponge.
5
Clean sponge
brush.
6
Put the sponge back and
reinstall the retainer in
the same direction.
7
Put the brush back and push the release lever back down
until it snaps into place.
8
Push down the upper
drive assembly until it
locks in position.
metal
and
and