Hello all, I just picked up a Restored 1949 John Deere AR at auction, and I didn't go down and check it out before I purchased it and went down to pick it up today and too my surprise it has a Power Block in it. This thing pops louder than my G that I had bored .90 over and I can tell its a powerful tractor. Now here comes the questions, does a original power block make the tractor a little more collectable, what type of gains do I get with the power block over a stock block, and do these blocks have a tendency to run hotter than a non power block a since I noticed that the temp gauge climbed right up to 220 in no time flat and stayed there It does have a distributor on it as well as live hydro's.
- Thread starter Le9102011
- Start date
buickanddeere
Well-known Member
All AR s had live hydraulics, this is why so many were sold instead of an A with transmission driven hydraulics .
The higher compression ratio also contributes to the exhaust note . One of my boy s 50 has a power block . It sounds more like a 60.
I have been reading up on the Powerblocks and I guess it was sold by Tractor Supply and for the late styled A's it came with a 6" bore vs the standard 5.5" bore, and I guess if you put the flat head on it vs the cyclone head you could make some serious compression and get probably 20-30hp gain out of it. But im not gonna pull this engine apart to see everything it has until I need too and that will probably be when im long gone and my kiddos start tinkering with it but I cant wait to take it out to a plow day here and plow and disc with it and put it on the pull sled... If I could figure out how to post a video to here..
buickanddeere
Well-known Member
. You are correct . The AR received the live hydraulics at serial number 477000 way back in the 1939 production year.
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
b&d
You must be referring to the model "A" serial number chart not the correct "AR" SN chart. 1953 AR serial # started @ 282551
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