USER MANUAL
Speedster
page 17
Replace group seal
Most group seals are made out of rubber-like material that will harden in time and thus over time need
increasing force to seal. We advise to replace such group seals at least every 6 months or more often
when needed.
Our (newer) machines have Arinca group-seals that do not harden quickly. The Arinca group-rings
seal with little force but will wear quickly when a lot of pressure is applied to them. Our advice is to use
one finger only to lock-in the portafilter. That way they will last for very long.
Materials needed
Group screen extractor (or back end of a fork or spoon)
Replacement group seal
Procedure
1. Pry the group screen gently from the group using the group screen extractor as lever under
bayonet-ring and in the ridge on the side of the group screen (see
Figure U 7
a). Pry left and
right for even distribution of force. The screen will fall out together with the rubber group seal.
Be sure to place the extractor in the ridge of the screen only.
2. Remove the group seal from the group screen.
3. One side of the group seal has a somewhat more rounded surface. When replacing the rubber
group seal, make sure the rounded side of the ring is inserted into the group (facing upwards).
Push the group seal not all the way to the end of the group screen (see
Figure U 7
b).
Figure U 7a (left). Gently pry left and right with group screen extractor to remove group screen and
group seal.
Figure U 7b (right). Mount group screen with empty filter holder and group ring not pushed all the way
on the group screen.
4. Remove the filter basket from the filter holder. Place group screen with group seal on the filter
holder and insert into group, pushing upwards. Turn filter holder in bayonet, then remove filter
holder.
5. Insert the filter basket to the filter holder. Turn into the group to finish pressing the group seal
into the group.
