MAINTENANCE MANUAL
Speedster
page 26
6.
Switch machine “off”.
7.
Unscrew the plastic cap from the group head.
8.
Remove the 6 nuts on the rim of the group head with a 10 mm spanner.
It is possible that the nut does not come loose from the tie-rod such that the tie-
rod will be unscrewed from the group ring. In this case, do not try to remove the
nut from the rod.
Water will run from the group into the drip tray as soon as the group bayonet ring
is loosened. The group and group neck contain about 1 litre of water, the drip tray
will not be able to discharge such a large quantity of water at once.
9.
Lift the top group head plate from the group head.
Beware
! The bayonet group ring (with tie rods) will drop when the top group
head plate is lifted off.
10.
With the jet housing still attached inside the group, remove the rubber ring from
the jet housing with a small screw driver, do not damage the ring.
11.
Use a needle or pin to remove the filter screen from the jet housing.
12.
use a 3 mm Allen key to remove the jet from its housing. Retain the jet housing
with a 11 mm spanner. See figure 15.
13.
Clean the jet (if possible use a 0.6 mm drill-bit).
14.
Remount the jet, do not over-tighten.
15.
Remount the filter screen and rubber ring in the jet housing.
16.
When remounting the bayonet group ring and top group head plate, make sure
that the rubber sealing ring on the top group head plate does not get jammed.
17.
Remount the 6 nuts on the top.
Beware
! Do not over-tighten the nuts. The bottom -bayonet- group ring is made
from brass; the threads in this ring wear out easily.
18.
Open water mains.
19.
Connect pump motor.
20.
Switch machine “on”.
21.
Check for leakage, first with brewing lever in middle position (line pressure; up to
3 Bar), then in lower position (pump engaged; 9 Bar).
22.
When leakage occurs, check if sealing ring in top group head plate is positioned
correctly.
23.
Replace the plastic cap on group.
