[AJD] A John Deere Question
Chris C
jdnutinwa at yahoo.com
Tue Dec 13 22:00:31 PST 2005
Hi Marc,
According to the parts manuals I have the A61R (sub
for AA3705R) was used from serial numbers 410,000 up
to 487,999 so that's 1936 through 1939 or all the
unstyled A's. I have a set of these in the garge,
they measure 7 5/8 long with the 5 1/2 inch bore and
use the 1/4 rings.
The next standard bore piston was the A2338R
piston. that covers your 1940 to part way through
1947A's. I don't have any standard bore pistons to
measure, but I have a set of 45 over for the same
serial number range they are 3/16 of an inch longer
than the early pistons.
If you move to the late styled A pistons
(standard) A3283R, they 3/8 of an inch longer yet
than then 40-47 pistons.
According to my Model A book, at Serial number
488,000 the stroke was increased by 1/4 inch, so I am
betting that also caused the change in piston size.
At 584,000 the piston size increased again, but the
stroke remained the same.
Hope that helps you out.
Chris
--- marc <mraasch at hickorytech.net> wrote:
> I need to know the size of pistons on a JD 39-40
> tractor compared to
> a JD 45 A Thanks
>
> I also have a book listed on Ebay called a history
> of John Deere's Company.
> would maka a christmas present for some one
> #7202686674
> Marc Raasch
> St Peter Mn 56082
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