MAINTENANCE MANUAL
Speedster
page 32
Rebuild valves
When properly maintained, the steam and hot water valves have a very long life-span.
Since temperatures in these valves rise up to 135 °C (275 F), the (rubber, Teflon and
silicon) sealing parts inside wear out a bit quicker than in your house-hold taps.
Materials needed
Allen key 5 mm
Adjustable spanner
Spanner 10 mm, 20 mm, 22 mm
Rag
Heat resistant, food safe, silicon grease
Replacement rings and disks (for both valves: 4x rubber ring in valve, 1x rubber
disk in valve, 1x Teflon ring in valve, 2x silicon ring in wand, 2x Teflon ring in
wand, 4x rubber ring on wand-plunger)
Figure 19. Exploded view of steam valve and assembly. The base of the valve will remain
attached to the Speedster. Note position of longer Allen bolt on top side of assembled
valve. On the machine, the longer bolt is in the lower position. The rubber sealing rings
are not removed from the valve shaft.
Procedure steam valve
1.
Turn machine “off”.
2.
Open steam valve until no more steam escapes the machine. This is to release
pressure from hot water/steam boiler, keep valve open.
3.
Remove steam wand: twist off conical nut with spanner 22 mm (see figure 14).
4.
Twist off cap in the centre of the steam valve knob, then remove nut with 10 mm
spanner (retain knob when loosening nut), remove knob.
5.
Put rag over valve end nut to protect chrome, loosen with adjustable spanner, do
not remove the nut completely at this moment.
6.
Remove the two Allen bolts (5 mm), a spring will push the valve from its base
(the base of the valve will remain on the Speedster). Be careful not to lose any
parts. The Teflon ring will probably remain in the valve, pry out gently.
7.
Now remove valve end nut.
8.
Use valve knob to remove shaft from valve.
Beware
! These threads are counter-clockwise.
9.
Replace Teflon ring, rubber sealing rings on shaft (2x) and rubber seal on plunger.
10.
Be generous with grease on rubber sealing rings and other parts and threads on
shaft.
rubber rings
Teflon ring
rubber seal
longer Allen bolt
valve end nut
plunger
do not
remove
grease
valve shaft
