Today's Message Index:
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1. 04:11 PM - Separating IO-540 Standard flange Crankcase (mark)
2. 04:31 PM - Re: Separating IO-540 Standard flange Crankcase (manuel weber)
3. 07:11 PM - Re: Separating IO-540 Standard flange Crankcase (ejharris813wk)
Message 1
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| Subject: | Separating IO-540 Standard flange Crankcase |
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
Message 2
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| Subject: | Re: Separating IO-540 Standard flange Crankcase |
There is a better way. =C2-I will send pics if the tools i used for years
by the morning
Sent from Yahoo Mail on Android
On Wed, Jan 18, 2017 at 6:10 PM, mark<n5qg@verizon.net> wrote: <!-- _fi
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I have IO-540-C4B5 engine that needs to be split and rebuilt for my RV-10 b
uild project.=C2- I plan on machining new ST-122 pressure plates and 8 bo
lts/nuts to separate the engine case since Lycoming does not provide this t
ool anymore.
=C2-
Does anybody have the dimensions of the Lycoming pressure plates ST-122 and
the size of the bolts/nuts used to separate Lycoming crankcases.=C2- I u
nderstand the ST-122-2 bolts thread onto the crankcase Thru-Studs, plates i
nstalled both sides of the case with nuts & washers added to the ST-122-2 b
olts to secure the plates.=C2- 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.=C2
- Specifically, what is O/D of the ST-122-2 bolts, the inside depth the b
olts are threaded to accept the Thru-Studs?=C2- Also, what size thread is
on the outside of the bolts and nuts?
=C2-
Any information regarding the ST-122 tool will be gratefully appreciated.
=C2-
Mark
Ft. Worth, Tx=C2-
Message 3
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| Subject: | Separating IO-540 Standard flange Crankcase |
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