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General Player Tubing

Below, you will see a couple of hand drawn pictures of the insides of a Lauter-Humana Player Piano. Most player pianos are tubed basically the same way. By identifying each of the major components of the system and testing each one separately, you can locate major problems very quickly. The average player mechanism is comprised of six major components. They are: the stack (which contains all the note bellows [strikers] and their associated valve), the lower section (which generates and stores the vacuum), the air-motor (which makes the roll go around), the air-motor governor (which controls the speed of the motor), the tracker service (which keeps the roll aligned with the holes in the tracker bar) and the transmission (which makes it possible to shift from Play to ReRoll)

All of the other devices in a specific unit are more than likely used to modify or enhance the sound of the music being played. The most common peripheral devices are the Bass Soft and Treble Soft, which lower the volume of the music in the Bass and Treble respectively and the Auto-Sustain which performs the same function as the Sustain pedal on the piano. As indicated in the drawing, the Auto-Sustain usually has an associated switch in the spoolbox that enables the user to turn that function "ON" and "OFF".

CLICK HERE to view an Original Diagram of the Lauter-Humana Hinged Action

ALL Comments and Suggestions for this page are welcome.
This page was last revised on February 4, 2013 by John A. Tuttle back to index...To Contents Page

The MIDI file Now Playing is called Comin' After You written by John Tuttle.

Since "Player-Care" is an internet business, I prefer that we correspond via E-Mail (click here to fill out the 'Request Form'). However, if I'm not in the middle of some other activity, you can reach me at 732-840-8787. But please understand that during the hours from 8AM-5PM EST (Mon-Sat), I'm generally quite busy. So, I probably won't answer the phone. If you get the answering machine, please leave a detailed message stating the reason for your call. Also, repeat your name and phone number clearly and distinctly. By necessity, I prioritize everything in my life. And, if you call and just leave your name and number, and ask me to call you back, it might be a day or two before I return your call. Why? Because I don't know why you want me to call and I might not be prepared to assist you in an effective and efficient manner. If you leave me an E-Mail address (which I prefer), spell it out phonetically. The more you do to help me, the more I can help you in return. Don't rush. You have four minutes to record your message.

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