User guide

Installaon Procedure
23
Installing the Sustain Pedal Solenoid ‐ Grand...
Youcannowturnyouraenontotheinstallaonofthesustainpedalsolenoidassembly.
Thisprocedureisnotrequiredwhensustainpedalisnotinstalled.

Becausethereisacertainamountofvariaoninthearchitectureofgrandpianos,youwillprobablyhavetocustom‐tailor
thefollowingdireconsto
suitthemechanicaldimensionsoftheparcularinstrumentyouareworkingon.

Thekeyelementstofocus  onhereincludethesustainpedallyre rod'supwardprojecon  ontothekeybedimmediatelyaboveit,thelocaonofthe
largeholethroughwhichthe
originalsustain pedalpitmandowelprojectedtoreachitscorrespondingholeinthewoodenoraluminumdampertray
(whichlisallofthepiano'sdamperssimultaneously),andthe rearmostOUTSIDEvercal wallofthekeyboard compartment,called"thebellyrail."
Theproperinstallaonofthesustainpedalsolenoidassembly takesintoaccountthe dimensionalrelaonshipsofthesethreeelements.

Inaddiontoprovidingforboththemanualand automac operaon of the piano's dampers,you want togivethesustainpedalsolenoidasmuch
mechanicaladvantage aspossibleinordertominimizethepowerrequiredtoacvateit.Despitetheexcellentdesignofthesustainpedalsolenoid
assembly,itslongtermoperaondependsuponyourskillinlocangthevariousleverage‐pointswhichenableittofunconbothmanuallyandauto‐
macally.

Opmally,thesustainpedalsolenoidassemblywill
bemountedonthebelly‐railimmediatelybehindthesustainpitmandowelwhichformerlycon‐
nectedtheoldtrapworklever'sfarendtothedampertrayinthekeyboardcompartment.Thisarrangementprovidestheshortestdistancebetween
thesustainpedalsolenoidassembly'slever‐armandtheloadimposedbythedampertraythroughthepitmandowel.Wheresuchasituaonexists,
youwillusethefourmounngholes tolocatethefour#10x1"panheadscrewsusedtosecurethepedalsolenoidtothebelly‐rail.Ifthebellyrailis
tooclosetothepitmandowel,locatethesolenoidonaframememberoronanextensionaachedtotheframemember.

Now,measurethedistancefromthecenterofthepedalsolenoid'spusherptotheexactcenterofthedampertray'spitmanrodlocaon.Sixtyper‐
cent(60%)ofthisdistanceFROMTHE
PEDALSOLENOID'SCENTER(thatis,thelion'sshareofthisdistance)isthelocaonofthefulcrumofthetrap‐
workassembly'sstraightbar.Theremaining40%ofthisdistancebecomestheminorporonfromthefulcrumtothepitmandowel.