---------------------------------------------------------- LycomingEngines-List Digest Archive --- Total Messages Posted Sun 12/06/15: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:24 AM - Re: Crankshaft Rear Plug for C/S Prop (Horst Romani ( Gmail)) ________________________________ Message 1 _____________________________________ Time: 09:24:24 AM PST US Subject: Re: LycomingEngines-List: Crankshaft Rear Plug for C/S Prop From: "Horst Romani ( Gmail)" Thanks for your reply , I have a mechanical masters degree from Germany working for many years at Mercedes Benz and later for Atlas Copco in Germany and Canada we had a lot of problems with the compressor crankshafts after they were chromed and the rounding so on either side of the journal were not to specs, also Remember the flat bottom boats in Florida use the same engines we use in our airplanes , many are overhauled to none FFA standards, this is how my friend got sucked in and came very close to loose his and his sons life Horst On Saturday, 5 December 2015, Gerry van Dyk wrote: > Thanks for the notes Horst, I'll check it out. You are quite right, the > chroming process on chrome-moly alloys does lead to hydrogen > embrittlement. I design oil/gas drilling tools for a living, any parts > that need chrome get a baking process afterward to leach the hydrogen from > the steel. This tag does call out the flange being tin plated and baked, I > presume that's for corrosion protection, and the baking for hydrogen > removal, assuming as well the tin plating has the same issue as chrome. > > I'll check into the process for checking about prior chrome repairs. > > Gerry > > ------ Original Message ------ > From: "Horst Romani ( Gmail)" > > To: "lycomingengines-list@matronics.com > " < > lycomingengines-list@matronics.com > > > Sent: 2015-12-05 5:31:29 PM > Subject: Re: LycomingEngines-List: Crankshaft Rear Plug for C/S Prop > > > If the journals have been ground and re chromed because a rod seized up on > one or more journals stay away from the crank , if it was ground to > accommodate a larger shell you are ok ! > Have they tested the journals with acid to make sure that it was not > chromed previously ? > I have a friend who had a Glastar on floats , he did purchase a used > engine had the engine overhauled unfortunately they forgot to check the > crankshaft journals with the acid test, at 7000 feet over the mountains in > BC the chrankshaft broke , he crashed upside down into the trees but thanks > to the Glastar steel cage he is still with us > Horst > > > On Saturday, 5 December 2015, Gerry van Dyk > wrote: > >> Hello Horst >> >> The yellow tag that came with the crankshaft is from EC Services in San >> Antonio. The rod and main journals have indeed been ground to undersize >> dimensions and been re-nitrided. It appears to have been reworked in >> accordance with all approved processes. Would you expect that I'd need to >> check for non-spec chrome plating as well? >> >> Gerry >> >> >> ------ Original Message ------ >> From: "Horst Romani ( Gmail)" < >> javascript:_e(%7B%7D,'cvml','horst.romani@gmail.com');> >> To: javascript:_e(%7B%7D,'cvml','lycomingengines-list@matronics.com');; >> "Gerry van Dyk" > > >> Sent: 2015-12-05 2:25:15 PM >> Subject: Re: LycomingEngines-List: Crankshaft Rear Plug for C/S Prop >> >> >> Make sure you have the crankshaft journals acid checked to find out if >> the crankshaft has been chromed , if the crankshaft has been chromed do not >> use it, it will eventually kill you >> Horst Romani >> Aero Club of BC >> Blue Skies >> https://www.facebook.com/aeroclub1915 >> http://aeroclubofbc.ca/ >> http://www.socialflight.com/ >> Phone 604-465-0446 >> >> On Sat, Dec 5, 2015 at 10:21 AM, Gerry van Dyk < >> javascript:_e(%7B%7D,'cvml','gerry.vandyk@eastlink.ca');> wrote: >> >>> I acquired a crankshaft for an O-360 from eBay, it was advertised as >>> 'suitable (convertable) for constant speed prop'. It is a hollow >>> front, with the front plug in place for fixed pitch service. I'm gearing >>> up to assembly my engine for my homebuilt project. I was hoping the rear >>> plug with the socket for the pipe plug was in place. I just removed the >>> front plug and in fact the aft plug is not there. >>> >>> I've ordered the plug. SI 1435 just says 'must be installed'. Can >>> anyone offer my some hints or tips to get it done? Seems pretty >>> straightforward. The front plug had a tacky sealant around the perimeter. >>> Would this be required for the rear plug as well? What product would it be? >>> >>> The overhaul manual calls for Drift Tool 64770 to install the plug. ACS >>> lists this tool at $4527. I'm thinking I'll use some thick wall steel >>> tubing with a groove cut to clear the oil return tube. Can anyone poke a >>> hole in that plan? >>> >>> Thanks for any help >>> Gerry van Dyk >>> >>> >>> >> >> ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message lycomingengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/LycomingEngines-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/lycomingengines-list Browse Digests http://www.matronics.com/digest/lycomingengines-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.