[AT] 1935 JD B Testing progress.

[deanvp]

Carl,  thanks for that tip.  I'm not sure I fully understand the procedure.  So I will try to play back what I think you said. Starting with a small drill bit drill the side of the nut about 1/2 way between the edge of the nut and the threads. A little closer to the edge of the nut. The use progressively larger bits until running into the threads.  Then the nut should be easier to split with a chisel.Sent from my Galaxy
-------- Original message --------From: szabelski at wildblue.net Date: 11/25/20  7:21 PM  (GMT-07:00) To: Antique Tractor Email Discussion Group <at at lists.antique-tractor.com> Subject: Re: [AT] 1935 JD B Testing progress. Dean,  If you run into an issue where you can’t get the nut buster onto the nut, try drilling the nut off. Start with your smallest drill and drill a hole about half way though one side of the nut, drilling a little closer to the side of the nut then the threads. Keep increasing drill size until you get close to the threads or until you break out of the side of the nut. Then you should be able to split the nut with a chisel and not a lot of hammering. The nut may not fully split, but you should be able to turn it off with little effort.Carl----- Original Message -----From: Dean VP <deanvp at att.net>To: 'Antique Tractor Email Discussion Group' <at at lists.antique-tractor.com>Sent: Wed, 25 Nov 2020 20:46:09 -0500 (EST)Subject: Re: [AT] 1935 JD B Testing progress.I think I found the real problem on my 1935 JD B today.  I applied 30 psi ofair pressure to the carburetor inlet side of the manifold and air wasrushing out the exhaust pipe with all valves closed.  Apparently I have arust out in the manifold or a blown gasket between the input and exhaustside of the manifold.  Started pulling the head today and have everythingloose except the water hoses. Will soon have everything off to see ifanything is visible.   I was hoping I wouldn't have to remove the manifold.The manifold studs will not come out without twisting off. I'm going to tryto use a nut buster on the top nuts and see if I can get the nuts offwithout breaking the studs. Then try to remove the manifold.  Was hoping Iwasn't going to have to do this but I'm glad I found the problem.  Willprobably be looking for a new reproduction manifold or good used one.Leon???  Real progress today.Dean VPApache Junction, AZ-----Original Message-----From: AT <at-bounces at lists.antique-tractor.com> On Behalf Of Dean VPSent: Tuesday, November 24, 2020 9:35 PMTo: 'Antique Tractor Email Discussion Group' <at at lists.antique-tractor.com>Subject: Re: [AT] 1935 Testing progress.The later JD All Fuel JD B's, which had higher HP, had a compression of70psi. Haven't found a reference for the earlier JD B"s.  But it surelywouldn't be higher than 70.  The difference between cylinders of 7 1/2psi ispushing the limits of acceptability.  These tests were with the tractorcold. The compression test is supposed to be run when the tractor is arunning temperature. The next test to run is the manifold leakage test. ThenI probably will install the magneto and carburetor and get it running so Ican do a high temperature compression test.  I may just pull the tappetcover and see if the lash is set right on the valves first. Now that I havethe right tools to do the testing I Can make some progress. Dean VPApache Junction, AZ-----Original Message-----From: AT <at-bounces at lists.antique-tractor.com> On Behalf Of Dean VPSent: Tuesday, November 24, 2020 7:43 PMTo: 'Antique Tractor Email Discussion Group' <at at lists.antique-tractor.com>Subject: [AT] 1935 Testing progress.Was able to get the 1935 JD B out of storage and since I had the carburetorand magneto removed during the winter storage we just pulled it to newlocation for the winter. Since we were pull moving anyway I asked my friendto pull me in gear  about the distance of the two blocks with the plugs outto get the oil pressure built up for the compression pending compressiontesting.  Then hooked the compassion tester and 7/8" to 154 MM adapter upand had him pull me a 100 feet or so in gear and tested compression on eachcylinder.  Thew results were not as expected.   Got about 62 1/2" psi on theleft cylinder and about 55 psi on the right  cylinder.  I expected a muchlarger difference between the two.  Not sure what it should be but sonereason I expect 70 psi but I don't remember where that came  from.  But the7 1/2psi difference by itself tell me I need to tear into this tractor.,  Idon't think.  Tomorrow I can do the manifold air pressure test.  If I cancomplete that. He results o f that test will determine what I test next,Dean VPSnohomish, WA 98290"Socialism is a philosophy of failure, the creed of ignorance, and gospel ofenvy, its inherent virtue is the equal sharing of misery."..Winston Churchill..._______________________________________________AT mailing listAT at lists.antique-tractor.comhttp://lists.antique-tractor.com/listinfo.cgi/at-antique-tractor.com_______________________________________________AT mailing listAT at lists.antique-tractor.comhttp://lists.antique-tractor.com/listinfo.cgi/at-antique-tractor.com_______________________________________________AT mailing listAT at lists.antique-tractor.comhttp://lists.antique-tractor.com/listinfo.cgi/at-antique-tractor.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.antique-tractor.com/pipermail/at-antique-tractor.com/attachments/20201125/e3ba6dcd/attachment.html>