Replace Brewing Piston Seal; Replace Brewing Piston - WMF espresso Service Manual

Service
2.3

Replace brewing piston seal

The seal on the brewing piston (o-ring) can be changed by the technician as part of the service maintenance 1.
If needed, the seal can be changed by the customer himself. The procedure is described in the User manual.
The seal can be changed with just a few, simple motions:
1. Start changing the seal
Care > Change of seals...
2. Follow the animation and clean the O-ring
3. Replace the portafilter
2.4

Replace brewing piston

The brewing piston is changed out by the technician as part of the service maintenance 2.
Replacing the brewing piston takes just a few, easy steps:
1. Open the Service menu
Service > Service routines ...
2. Follow the animation and change the brewing piston
3. Replace the portafilter
Important note for technicians:
To drive down the brewing piston, the portafilter 2 (double portafilter) must be inserted without brewing sieve, retaining spring, and insulation insert.
This is the only way to ensure that the brewing piston can travel down as far as necessary without an error message.
> Group (left or right)
> Piston change ... > Group (left or right)
12