The little guy - Steam Pin

Steam Pin O-Ring is ordered separately.

Compatible with all Otto and the little guy machines except for units with OPE serial numbers. Contact us for units with OPE serial numbers.

Service Tip: Steam Knob Leak & Pressure Loss

If you're experiencing steam leaking from the steam arm or noticing low pressure when steaming milk or making coffee, the issue may be with the steam pin inside the steam knob assembly.

What’s Happening?

The steam knob is connected to a conical steam pin that blocks the steam flow when closed. If this pin isn’t sealing properly, steam escapes — reducing pressure for both milk texturing and espresso extraction.

Common Cause: Mineral Buildup

In hard water areas, calcification is the most common culprit. Minerals from dried steam can build up, preventing the pin from sealing tightly.

Quick Fix (Try This First):

If you notice steam leaking or reduced pressure, it may be caused by a small build-up of calcification around the steam pin. A simple step you can try is turning the steam knob back and forth three to four times, opening and closing it firmly. This movement often helps to break away any minor calcification and allows the pin to seat properly again. When doing this, please don’t overtighten the knob — applying too much force may damage the steam tip or the knob itself.

Still Leaking?

If that doesn’t work, the steam pin may be worn and need replacing. Here’s how to access it:

How to Remove and Inspect the Steam Pin

• Unscrew the Steam Knob
  Use a Phillips head screwdriver to remove the screw at the center of the knob. Slide the knob off.
• Remove the Steam Valve Collar
  Try turning it counterclockwise by hand.
  If it doesn’t move easily, go to Step 3.
• (If needed) Remove the Steam Collar Insulator. Pull it off by hand, then try again to unscrew the Valve Collar.
• Unscrew the Steam Valve Collar
  If it’s tight, use pliers with a soft cloth or rubber grip to avoid scratching it.
• Remove the Steam Pin
  Unscrew it counterclockwise by hand.
  If it’s stuck, a small spanner may help.

Reassembly

Reinstall all parts in reverse order. Make sure the steam pin is seated properly to prevent future leaks