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Separating IO-540 Standard flange Crankcase

 
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wbecker319(at)hotmail.com
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PostPosted: Thu Jan 19, 2017 4:24 am    Post subject: Separating IO-540 Standard flange Crankcase Reply with quote

EXCELLENT ARTICLE ON SPLITTING LYCOMING CASES. [url=http://www.ryanmachine.net/Docs/Let\'s-Split.pdf]http://www.ryanmachine.net/Docs/Let's-Split.pdf[/url]
[url=http://www.ryanmachine.net/Docs/Let\'s-Split.pdf]Let’s Split! - Ryan Machine[/url]
www.ryanmachine.net
I asked a few shops how they sepa-rated wide-deck engines and found that they used in-house, custom-designed tools. Since I couldn’t find these tools, I




From: owner-lycomingengines-list-server(at)matronics.com <owner-lycomingengines-list-server(at)matronics.com> on behalf of ejharris813wk <ejharris813wk(at)comcast.net>
Sent: Wednesday, January 18, 2017 9:09:06 PM
To: lycomingengines-list(at)matronics.com
Subject: RE: Separating IO-540 Standard flange Crankcase

Mark
Google st122tool and rent it for 125$






Sent from my Verizon Wireless 4G LTE smartphone



-------- Original message --------
From: mark <n5qg(at)verizon.net>
Date: 01/18/2017 7:10 PM (GMT-05:00)
To: lycomingengines-list(at)matronics.com
Subject: Separating IO-540 Standard flange Crankcase

<![endif]--> <![endif]-->
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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wbecker319(at)hotmail.com
Guest





PostPosted: Thu Jan 19, 2017 4:40 am    Post subject: Separating IO-540 Standard flange Crankcase Reply with quote

Case splitting tool rental. http://ryanaircrafttools.com/product/lycoming-engine-case-splitting-tool-2/

Lycoming Engine Case Splitting Tool – Rental – Ryan ...
ryanaircrafttools.com
The Lycoming engine case splitting tool can be used on both four and six cylinder engines. It will also work on the older “Narrow-Deck” and the newer “Wide-Deck ...




From: owner-lycomingengines-list-server(at)matronics.com <owner-lycomingengines-list-server(at)matronics.com> on behalf of ejharris813wk <ejharris813wk(at)comcast.net>
Sent: Wednesday, January 18, 2017 9:09:06 PM
To: lycomingengines-list(at)matronics.com
Subject: RE: Separating IO-540 Standard flange Crankcase

Mark
Google st122tool and rent it for 125$






Sent from my Verizon Wireless 4G LTE smartphone



-------- Original message --------
From: mark <n5qg(at)verizon.net>
Date: 01/18/2017 7:10 PM (GMT-05:00)
To: lycomingengines-list(at)matronics.com
Subject: Separating IO-540 Standard flange Crankcase

<![endif]--> <![endif]-->
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


- The Matronics LycomingEngines-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?LycomingEngines-List
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