Big time change in rails from D9D to D9G...pitch went from 9.00 in to 10.25 in.
Bolt size for the D9G is 1.00 in.
Could not find info on bolt pattern but I'm pretty sure it's different than the D9D.
Definitely different part numbers for the shoes.
The track shoe bolt pattern is precisely the same spacing for the D9D, the D9E and the D9G.
However, the 9.00" pitch D9D/E track uses 7/8" track shoe bolts, the D9G uses 1" bolts.
There is no interchangeability between the 9.00" pitch track links and the 10.25" pitch track links .. but you will be able use 9.00" pitch shoes on the 10.25" pitch links, by drilling out the bolt holes .. or you could use 10.25" pitch shoes on 9.00" track links, by installing a tight-fitting, thin steel bushing in the shoe bolt holes.
Dismantled D9's from Machinery Trader
D9's http://www.machinerytrader.com/listings/dismantledsearch.aspx?ETID=3&Manu=CATERPILLAR&Mdltxt=D9&mdlx=exact&GUID=89c2b08400354c00b0ad981487c14f32
D9D's http://www.machinerytrader.com/listings/dismantledsearch.aspx?ETID=3&Manu=CATERPILLAR&Mdltxt=D9D&mdlx=exact&GUID=89c2b08400354c00b0ad981487c14f32
D9E's http://www.machinerytrader.com/listings/dismantledsearch.aspx?ETID=3&Manu=CATERPILLAR&Mdltxt=D9E&mdlx=exact&GUID=89c2b08400354c00b0ad981487c14f32
Hope this helps!
alan627b
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