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1. 03:36 PM - Re: Separating IO-540 Standard flange Crankcase (Tim Lewis)
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| Subject: | Re: Separating IO-540 Standard flange Crankcase |
http://nickugolini.com/Website/CaseSplitter/case_splitter.htm
--
Tim Lewis -- HEF (Manassas, VA)
A&P
RV-6A N47TD -- 1104 hrs - sold
RV-10 N31TD -- 740 hrs
mark wrote on 1/18/2017 7:10 PM:
>
> I have IO-540-C4B5 engine that needs to be split and rebuilt for my
> RV-10 build project. I plan on machining new ST-122 pressure plates
> and 8 bolts/nuts to separate the engine case since Lycoming does not
> provide this tool anymore.
>
> Does anybody have the dimensions of the Lycoming pressure plates
> ST-122 and the size of the bolts/nuts used to separate Lycoming
> crankcases. I understand the ST-122-2 bolts thread onto the crankcase
> Thru-Studs, plates installed both sides of the case with nuts &
> washers added to the ST-122-2 bolts to secure the plates. When the
> nuts are tightened down it causes the pressure plates push against the
> other Thru-Studs that are up against the inside of the pressure
> plates, causing the case halves to separate. Specifically, what is O/D
> of the ST-122-2 bolts, the inside depth the bolts are threaded to
> accept the Thru-Studs? Also, what size thread is on the outside of
> the bolts and nuts?
>
> Any information regarding the ST-122 tool will be gratefully appreciated.
>
> Mark
>
> Ft. Worth, Tx
>
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