[AJD] JD A s/n 607821Piston Pin Bushing Troubles

[greg at theoldtractorcompany.com]

Chris
That is exactly what oversize wrist pins are for, to obtain proper clearances both in the pin bushing as well as the piston. If a pin is severely worn it not only causes wear in the piston pin but also the piston itself. The solution was to offer oversize pins. Most machine shops use a pin hone to power hone them to specs, it's no big deal. Plus it saves buying two new pin bushings usually as the proper clearances are obtained by installing and fitting oversize piston pins.
Greg

Greg Stephen
The Old Tractor Company
Stephen Equipment Company
Box 709
7460 E Hiway 86
Franktown, CO 80116
303-663-5246
303-468-0377 FAX<<--A GREAT WAY TO REACH ME!


------------------------------------------------
On Mon, 27 Dec 2004 18:50:50 -0800 (PST), Chris C <jdnutinwa at yahoo.com> wrote:

> 
>  I thought I would spend some time working on my Many
> A projects today.  I thought I would work on changing
> out the 090 pistons in the 48 A for the .045 pistons
> that match my replacement block.
> 
>    The pins came out of the 090 pistons and the 045
> pistons just fine.  However,  the pins from the .045
> pistons didn't want to fit the rod bushings.  After
> some careful work with the Micrometer they might by
> .003 bigger but it's hard to be that accurate with my
> digital mich.  So off to the parts book to study up on
> the problem.
> 
>     The book (pc675) lists 3 Piston Pin options, 
> Standard,  .003 and .005 One marked with red, the
> other yellow.  Hmm..   Back to the workbench.  Ah Ha! 
> Red marks on the .045 pins.  back for more studying..
> RATS only one piston pin bushing listed.  So, the
> question,
> 
>      Does Deere or anyone else offer .003 and .005
> bushings?   I have heard of having to ream out pin
> bushings.   I went out and bought a Brake Cylinder
> Hone and am planning on honing the little suckers out
> but before I go crazy on them I am wondering if anyone
> has a better idea?
> 
>                         Chris
> 
> 
> 		
> __________________________________ 
> Do you Yahoo!? 
> Yahoo! Mail - Find what you need with new enhanced search.
> http://info.mail.yahoo.com/mail_250
> _______________________________________________
> Antique-johndeere mailing list
> http://www.antique-tractor.com/mailman/listinfo/antique-johndeere
>