MAINTENANCE MANUAL
Speedster
page 37
3.
Remove the copper tube from the back-side of the pre-infusion cylinder with a 13
mm spanner.
4.
Remove the tube leading to the coffee boiler pressure gauge from the boiler with
a spanner 13 mm. retain the fitting with a 14 mm spanner. Bend the copper tube
a little downwards.
5.
Remove the fitting of the pressure tube from the boiler. This will give you enough
space to remove the progressive pre-infusion cylinder.
6.
Remove the 2 mounting screws on the front of the machine to detach the cylinder
from the frame, take the cylinder out of the machine (see figure 24).
7.
Remove the retaining ring on the front of the cylinder (see figure 25).
8.
Remove the O-ring from the piston (e.g. with a small screwdriver, do not scratch
the piston).
9.
Inspect rubber O-ring and spring on piston, replace when necessary.
10.
Clean cylinder and piston, do not scratch the inner surface of the cylinder.
11.
Grease the groove in the piston, replace the rubber O-ring and put some grease
on the O-ring itself. Put a little grease on the piston shaft.
12.
Re-assemble the progressive pre-infusion cylinder.
13.
Remount the cylinder in the machine and the copper tube on the cylinder.
14.
Remount the fitting of the pressure gauge tube on the boiler with a drop of Loctite
or a few windings of Teflon tape
15.
Remount the tube from the pressure gauge.
16.
Switch machine “on”.
17.
Check for proper operation: use blind filter and make sure that progressive pre-
infusion cylinder moves out when brewing lever is (in middle or) lower position,
and returns when brewing lever is in upper position.
18.
Check for leakage.
19.
Remount upper body panel first, then side panels.
Figure 24. Progressive pre-infusion cylinder isolated from machine, the mounting parts
that hold the cylinder to the machine are also shown. (In fact, the retaining ring that
holds the upper end of the cap is not mounted, for that reason, the piston end is not
flush with the outside)
