Gulbransen Upright Player Rebuild
from customer from Versailes, MO
12/04

The following pictures are before

pictures taken for reference


Piano Action (Left)
Upper Player Section (Left)


Piano Action (Right)
Upper Player Section (Right)


Lower Player Section (Sustain Pedal Pneumatic)


Lower Player Section (Pump, Reservoir, Stack Cutoff and Tempo Regulator)


Lower Player Section (Hoses and Linkages)


The Player Piano Rebuild Kit

From here, it's take all the replacement parts and start the long journey of the rebuild process.



The following are taken after all sections

were taken out and brought to my shop



Piano action thoroughly checked over to tightening of all screws, hammer shaping to

replace and cracked or broken parts, eliminate the deep grooves in the hammers


Removing all the old bridle straps.


Attaching new bridle straps



Player action detail

reference pictures


Roll transmission (from the back)


Roll motor (from the back)


Spool box (from the left)


Spool box (from the left, closer)


Roll transmission (from the front)


Roll motor (rotor valve timing settings)


Reference of where the hoses start (left)


Reference of where the hoses start (right)


Pneumatic stack (left)


Pneumatic stack (middle)


Pneumatic stack (right)




Ready to start disassembly,

cleaning and reassembly


Remove, disassemble and prepare to reassemble of pneumatic to finger stickers with buckskin (88)


Removed pneumatics from main wind chest. (88) Also, starting to remove pneumatic mounting pins from pneumatic valve block (176)


All pneumatic mounting pins removed (176)


Time to soak off old pneumatic cloth and loosen pneumatic block valve for disassembly (88)


Disassembled and drying pneumatic and valve block (88)


Separating pneumatic valve blocks from the rest of the assembly (88)


Making sure that the valve hole is big enough for the valve assembly (88)


Making sure that the vacuum hole is big enough to activate the valve properly (88)


Examining valve block for hair line cracks for possible air leaks, fixing if needed (88) Also, with 0000 steel wool, polished brass valve seat ring (88)


Gluing in valve pouches (88)
Testing pouch travel with test valves (88)


Assembling top half of pneumatic valve (88)


Attaching bottom half of pneumatic valve with top half (88)


Matching pre-numbered pneumatic valve block with matching pneumatic boards (88)


Gluing on new pneumatic hinge and felt dot for limiting the closing of the pneumatic (88)


Marking and cutting out strips of pneumatic cloth for recovering the pneumatic boards (88)


Remember each step is done 88 times
a) fold and square off hinge
b) find the middle of the cloth and glue the edges of the pneumatic to the cloth
c) glue cloth to one side
d) glue cloth to the other side
e) flap over and glue end of cloth to pneumatic
f) flap over and glue the other end of the cloth to pneumatic
g) let glue dry and trim of excess


Assemble valves, glue on outer seat ring, let dry and test for leaks, fix if needed (88)


Glue on finished recovered pneumatic boards to valve block, let dry and test for leaks, fix if needed (88)


Finished pneumatics, ready to reattaching (88)


Disassemble, clean and reassemble spool box


Disassemble, clean and reassemble roll transmission


Attach rebuilt roll motor to transmission mounting board and hook up tracking linkage


Measure, cut and run new tubing between tracker bar and nipples on main wind chest (88 + expression hoses)


Insert pneumatic mounting pins in pneumatics (176). Start mounting them on to the main wind chest, checking for leaks, fixing of needed (88)


All pneumatics are mounted. Ready for the pneumatic fingers (88)


Attaching the pneumatic finger assembly (88)


All Done
Ready for final testing




Before reference pictures of

exhausters and reservoirs


Back view


Front view


Exhausters and reservoirs taken apart from main vacuum channel. Old material removed from exhausters and reservoir


Exhausters and reservoir recovered with new bellows material


Main vacuum channel sealed and sanded. Exhausters reglued to main vacuum channel.


Reservoirs reglued to main vacuum channel. All hardware reattached, ready to go back into the piano