The Old Machinery Magazine Forum

Forum Categories => Stationary Engines => Topic started by: Polybus on 13 September, 2019, 09:41:48 am

Title: J.A.P. Model 2A
Post by: Polybus on 13 September, 2019, 09:41:48 am
I am currently restoring a little J.A.P. Model 2A and have a question about end float.

I started this project a couple of years ago, and life got in the way and I have only now got a chance to get back to it.

So it was disassembled and cleaned back in 2015, then stored until now. I have got it back together and got the little fella running, but when it runs I can actually see the crank moving in and out of the crank, and not just a little bit, probably around 6-7 mm or 1/4 of an inch. I don't remember this being present before I disassembled it.

I'm worried I've lost/forgotten to replace some shims, or washers onto the crankshaft, and this might be causing the looseness.

Question is:  What is causing this end float? And how do I get rid of it?

Any ideas?

Thanks
Title: Re: J.A.P. Model 2A
Post by: cobbadog on 13 September, 2019, 04:07:46 pm
I have never pulled one of these apart but don't run it any more until it is all gone as it could bend the conrod with that much end float.
Title: Re: J.A.P. Model 2A
Post by: Polybus on 13 September, 2019, 05:04:15 pm
Cheers CobbaDog

I won't run it again, I'm going to get it apart in the next day or two to see whats going on.

If I find anything interesting I'll post some photos.
Title: Re: J.A.P. Model 2A
Post by: Scott on 14 September, 2019, 07:38:17 am
Hello Mr Bus
This may be of use for you.
https://www.outdoorking.com/forum/ubbthreads.php/topics/6093/jap-engine-parts-list-manuals.html (https://www.outdoorking.com/forum/ubbthreads.php/topics/6093/jap-engine-parts-list-manuals.html)

Cheers Scott