Brewing unit gasket replacement

Introduzione

The gasket of the brewing unit has to withstand heavy usage. Especially the large O-Ring on the piston needs replacing from time to time. Follow this guide to replace the gasket.

These instructions may also help with coffeemakers from Saeco and Gaggia - they are all made by the same manufacturer and have a very similar design.

Cosa ti serve

Passo 1 Brewing unit gasket

Brewing unit gasket replacement, Brewing unit gasket: passo 1, immagine 1 di 2

Brewing unit gasket replacement, Brewing unit gasket: passo 1, immagine 2 di 2

Open the hatch on the side panel and remove the brewing unit.

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Passo 2

The spout for the hot coffee is located on the top of the brewing unit. It is fastened with two screws. Underneath is the crema valve. It consists of a spring and a little glass ball. Make sure the spring is reinserted with the thin end touching the glass ball when re-assembling.
Remove the two Torx T10 screws on the crema valve.
Lift off the crema valve minding the spring and the glass ball.

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Passo 3

The upper piston is held in place in the frame with four locking pawls. Push down all four latches with a spudger, then remove the piston by pushing it downward.
If you want to replace the gasket, you can do this now and re-assemble the device and stop here. However, a general maintenance of the brewing unit is strongly recommended.
Unscrew the Torx T10 screw on the brewing sieve and remove it.

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Passo 4

Brewing unit gasket replacement: passo 4, immagine 3 di 3

There are three Torx T10 screws in deep blind holes that hold together the two parts of the brewing unit. Unscrew them and lift off the upper side panel.

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Passo 5

Now you can disassemble the brewing unit into its three main parts: the brewing unit and the two side panels.

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Passo 6

You can push out the lower piston from the brewing unit if you snap the deflection lever out of its socket with a screw driver.
Clean all parts with very hot water and dishwasher liquid.
Grease all moving parts with food grade silicone fat. Dont forget the tracks in the side panels.

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Passo 7

Brewing unit gasket replacement: passo 7, immagine 3 di 3

Take this opportunity to carefully replace the two O-rings on the support valve. The larger one is at the top. These two seals are stressed during every brewing process. Therefore, lubricate them with food-safe silicone grease.
On some models, the support valve is covered. In this case, you must unscrew the cover first.

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