La San Marco 105 Model Upper Sight Glass Tube - Two Group la-marzocco-grinder-parts/la-marzocco-swift-eps or requires extra hand pressure

or requires extra hand pressure to tamp is the classic symptom of this spring fatiguing

Don't forget the element gasket (F_1403)

If you need supply and drain tubing

test this switch with a multimeter before replacing the doser lever assembly - a worn microswitch is a far more common (and cheaper) failure than the lever itself

Before condemning your control board over inconsistent dosing

La San Marco 105 Model Upper Sight Glass Tube - Two Group la-marzocco-grinder-parts/la-marzocco-swift-eps or requires extra hand pressureLa San Marco 105 Two Group Upper Sight Glass Tube Current production sight glass tube for the two group La San Marco 105, letting you visually confirm boiler water level at a glance. This is the newer casting, if your machine still uses the earlier version, see the old version SM_398 tube instead. SPECIFICATIONS Threads: 3 8" female x 1 4" female Length: 20 mm COMPATIBILITY Fits: La San Marco 105 model (two group) only, not interchangeable with 85,