This video shows the result of the silent pump mod. Lelit Grace/Victoria vibration pump can be changed with the one that comes in Lelit Mara X. The modification is bolt-on and doesn't require any changes or tampering with any stock parts. Takes about 30-40 minutes. Prepare some spanners - sizes between 11 and 14.
Besides being quieter, the silent pump has a different flow rate which results in better coffee extraction - at least in my case.
The part number of the pump in Lelit's catalogue is 4000034 - OLAB Silent Green. The pump comes with new rubber mounts which are improved compared to the stock model.
Here is a video that shows the pump change procedure:
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Besides the pump, I also installed a pulsor device that absorbs the vibration pulses and provides even quieter pump operation. It's made by QuickMill with part number PL0800PU.
Stock fittings can be reused and there is not need to purchase anything additional. However, I decided to rebuild the whole fitting assembly and leave the stock one intact. In case you want to do so, you will need the following parts:
- Self priming valve - MC111 in Lelit's catalogue
- OPV - MC097 in Lelit's catalogue
- L-shaped tube fitting - 9700038 in Lelit's catalogue
You'd also need some PTFE tape (0.075 mm thickness) when installing the fittings.
Bear in mind that in order to fit the pump with the pulsor, the positioning of the fittings must be changed. The self priming valve must be installed vertically right after the pulsor. If you would like to prevent the pulsor from hitting the nozzle of the solenoid valve drain, you must install a 1/8 M/F nipple (as short as possible) right after the pump.
Additionally on the video you will notice that the steam wand is also not stock. I have swapped it for the Lelit Elizabeth PL92T steam wand. It is a cold-touch wand that you can freely touch without getting burned and without getting fried milk foam on the wand after steaming. Part number of the steam wand is 1000168. Instruction to change can be found here:
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All parts can be ordered from:
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