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200 series 37 and 37A snowblower differences


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#1 MacWorld OFFLINE  

MacWorld

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Posted December 02, 2011 - 10:28 AM

I bought a 37A not knowing why both 37 and 37A existed. Since my 214 is an early one (serial number pre-55000) I hoped it could use a 37A snowblower. My first thoughts on the differences where
- 37 for early and 37A for late
- 37 for manual PTO 37A for electric PTO

Nope. The actual differences lies on how the rotation is inverted. The engine rotates oposite from the tractor's wheel and the snowblower must turn on the same direction as the tractor's wheels. To solve this problem JD had at first a... well... bad idea of crossing the drive belt between the PTO and the snowblower. This is the 37 model snowblower.

On the 37A they had another (better) idea, they added 2 small sprockets and ran the drive chain BEHIND the main auger wheel's sprocket instead of in front. The small sprockets are located one at top and one at bottom of the main sprocket to get the chain to grab the main sprocket.

Here is the picture for the 37 model drive belt and how it should cross itself
Posted Image

Here is the picture for the 37A model drive chain. You can see the 2 #10 sprockets and a small curve where the chain is passing.
Posted Image

The drive belt part numbers are:
37 : M45998 (longer than M44272) 2011-12 : 26$ CAN
37A : M44272 2011-12 : 23$ CAN

On 2011-12 the manual PTO extra sheave (M47704 for pre SN 55000) required for both snowblower is 26$ from JD.

I hope it can help someone

#2 peters OFFLINE  

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Posted December 02, 2011 - 02:08 PM

I am in the process of rebuilding my 37A if you have questions. I am also "hopping" it up a bit by putting slightly smaller sprocket on (#2 in diagram). Also have early 80s 214.

--Peter




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