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Rancilio Silvia Mega Mod by Avi

Index of pages:

Home | Introduction | Disassembly | Pressure gauge | Brew+Steam control | Brew Timer | Pre-Infusion
Water Level | Light | Boiler insulation | Grouphead Shower | Drip Tray | Pump Drain | Power Timer | Acknowledgments


9. Brew head shower screen (filter) mod

Rancilio from a very mysterious reason attaches the brew shower screen with an M5x14 hex slot head bolt.
This bolt head leaves noticeable mark on the coffee puck and some suggest it has impact on the result. It also makes the cleaning of this area more difficult.


grouphead screen filter prior of modding


I reworked it easily to a flat design with simple steps.

A. Using a sunk tool to machined the group jetbraker part and get a cone shape with angles matching the new countersunk screw.

B. Using M5x12 countersunk Hex head screw to replace the original one.

tipTip: Hex head allows easier access with a tool to screw/unscrew it. If Phillips head is used instead, a 90 degree screwdriver is probably needed to access this limited area.

C. On a wise, I pressed the screen with the screw on one side against the jetbraker and the diffuser on the other side until the screw pressed the shower screen and distorted it to reach a flat surface with the screw head.

tipTip: Use only Stainless Steel screw. A4 grade (marine grade). It is preferred if you want it to last for years.



grouphead parts


machining the jetbraker

pressing the screen

assembled mod



 

 

Index of pages:

Home | Introduction | Disassembly | Pressure gauge | Brew+Steam control | Brew Timer | Pre-Infusion
Water Level | Light | Boiler insulation | Grouphead Shower | Drip Tray | Pump Drain | Power Timer | Acknowledgments



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