This page will be populated with non-copyright technical documents in due course. In addition please note that the redrawn schematic diagrams of the Pianola, Half Duo Art and Higel player pianos are copyright 1983-1988 I A Jones, are provided here for the benefit of members and other enthusiasts and are NOT to be reproduced commercially. The original Music Trades School diagrams are also linked for comparison, noting that the reproduction quality of these original charts ranges from mediocre to extremely poor.
Please note that this information is provided in good faith and with no warranty of its accuracy or suitability.
Motora suction device installation instructions
This is something of a curiosity as the Motora (a turbine-type vacuum pump similar to a vacuum cleaner motor) is normally only encountered as original equipment in Duo-Art reproducing pianos. This seems to be instructions for installing it in a pedal-only non-reproducing instrument. Download an A3 copy here.