Saeco Royal support valve on the thermoblock

はじめに

The support valve is heavily used, as it docks with each cup of coffee inlet pipe of the brewing group. During a revision, you can replace the seals and inspect or replace the internal components. You have to open the machine and remove the thermoblock. There are units from the Royal series in which the support valve is not mounted to the thermoblock. On those it is sufficient to replace only the valve.

必要な工具と部品

手順1 Preparing

Saeco Royal support valve on the thermoblock, Preparing: 手順 1、 1の画像 1

Unplug!
Remove all attachments like water tank, brewing unit etc.
The pictures show a Royal Cappucino One Touch HD8930, but the opening procedure is similar to all models.

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手順2 Top

Saeco Royal support valve on the thermoblock, Top: 手順 2、 2の画像 1

Saeco Royal support valve on the thermoblock, Top: 手順 2、 2の画像 2

The coffeebean supply is fixed with two screws. Unscrew them and lift it off.
There is a black rubber lid under the bean hopper that you can easily lift off, leaving a large opening.
The adjuster of the grinder has to be solved. Mark the position or just take a picture. This type is fixed with a screw, others are only sticked together.

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手順3 Rear side

Saeco Royal support valve on the thermoblock, Rear side: 手順 3、 1の画像 1

There are two screws to be turned out.

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手順4 Front

Saeco Royal support valve on the thermoblock, Front: 手順 4、 3の画像 1

Saeco Royal support valve on the thermoblock, Front: 手順 4、 3の画像 2

Saeco Royal support valve on the thermoblock, Front: 手順 4、 3の画像 3

The screws are situated on the underneath of the cover. This type is held by four screws.

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手順5 Lift cover off

Saeco Royal support valve on the thermoblock, Lift cover off: 手順 5、 2の画像 1

Saeco Royal support valve on the thermoblock, Lift cover off: 手順 5、 2の画像 2

Now the cover can be raised: first grip on left and right rear side and lift about 10 cm (4 in). Sometimes the cover jams a little bit.
Solve the hoses which lead to the water tank. Perhaps you have to pull out some contacts, (e.g. the yellow-green protection lead), don´t forget to put them on again later.
The cover can be drawn aslant towards the front, sliding it over the hot water pipe.
Most repairs can be done with the cover being laid up partially , it must not be completely removed.

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手順6 Remove thermoblock

Saeco Royal support valve on the thermoblock, Remove thermoblock: 手順 6、 1の画像 1

This is what the removed thermoblock looks like. This one was 14 years old and leaking in various places.

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手順7

A look into the open device. The thermoblock is hidden under a pile of cables and tubes.

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手順8

It's safer to number the cable connectors on the electronics. You probably just need to disconnect the slightly hidden # 14 connector on the two green cables at the very bottom and # 7 on the blue cable on the top.

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手順9

The thermoblock is attached to the wall behind the brew group with only two Phillips screws.
Remove the two Phillips screws circled in red.

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手順10

Take out the thermoblock and place it on the machine.
Hold on! The thermoblock is still connected to the machine by many cables and hoses. Don't attempt to completely remove it just yet!

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手順11

Pull the clamp on the hose to the steam valve off.
Pull the hose circled in orange out.
There are two seals at the end of the hose that stick to the hose. Exchange them during re-assembly.

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手順12

Remove the metal holder of the thermal fuse.
My thermal fuse holder is heavily rusted, this may or may not be the case for you.

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手順13

Pull first the clamp, and then the second pressure hose out of the thermoblock.
There are two seals at the end of the hose. They stay stuck either at the end of the hose or afterwards, so don't try to remove them. Exchange them during re-assembly.

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手順14

Disconnect the connector with the two gray cables from the thermal switch.

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手順15

The blue cable from the thermoblock leads to the connector on the electronics, which is marked with 7 here. This particular plug stuck a lot, so force was required to pull it out.

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手順16

Saeco Royal support valve on the thermoblock: 手順 16、 3の画像 3

The Allen screw, which holds the holder of the two thermocouples, was not easy to open...
This can also be a Phillips screw. It may vary which appears for you.
Therefore, the plug on the electronics with the two green cables was pulled out. The plug has the mark 14 and is at the very bottom of the electronics.
Disconnect the plug with the yellow-green grounding wire from the support valve.

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手順17

Thread the green and blue cables out.
The thermoblock is free. Lift it out of the machine.
To replace the thermoblock, the attached components must be removed from the old block and transferred to the new part.

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手順18 Support valve on the thermoblock

Saeco Royal support valve on the thermoblock, Support valve on the thermoblock: 手順 18、 2の画像 1

Saeco Royal support valve on the thermoblock, Support valve on the thermoblock: 手順 18、 2の画像 2

Remove the four Phillips screws securing the support valve.
Pay attention to the connection tab for the grounding cable and keep it safe since it will be needed again.
Lift the unit with the support valve out of the thermoblock
The unit is sealed with an O-ring in the thermoblock. Clean the sealing surfaces before re-assembly and insert a new seal.

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手順19

Unscrew the valve out of the unit with a 13mm open end wrench.
Check if everything moves smoothly. Clean all parts well. Careful, they are sensitive.
The valve spring
The valve stamp. Check if the gasket on the valve seat is still good. Change it if necessary.
The sliding piece
Support seal on the thermoblock. Medium size.
Support gasket top. The largest of the three.
Support gasket bottom. The smallest.