La Pavoni Lever Chrome Steam Tap Shaft code 3113034 is usually responsble for hard moving knobs and leaky steam tips.
Can be found on most Stradivari Lusso or Professional, Europiccola and Professional, Romantica and Stradivari Gran Romantica.
La Pavoni Lever Chrome Steam Tap Shaft code 3113034 is also used on the rare Gaggia Factory G105 and G106.