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Drive Shaft Questions...


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#1 BairleaFarm OFFLINE  

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Posted September 28, 2013 - 04:46 PM

Let's say I put an engine into a gt. If the engine shaft isn't centered with the hydro shaft I'll get vibration correct. Do they use ujoints and/or rag joints to eliminate the drive shaft angles? It seems the snapper with rubber engine mounts and a almost solid drive shaft seems like a bad idea.

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#2 TAHOE OFFLINE  

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Posted September 28, 2013 - 06:31 PM

I think Snapper used the rubber isolator motor mounts to reduce motor vibration to rest of tractor. Your driveshaft has u joints as there is a slight pitch between motor and pump, like a car tranny driveshaft. I think the 1650 is direct connection from motor to pump, my 1855 has a set of pulley the pivot and drive off motor and driveshaft them connects to pulleys and back to pump, talk about a lot of possibly issues and parts to wear out....and expensive.
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#3 JDBrian OFFLINE  

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Posted September 28, 2013 - 06:39 PM

When there is a difference in height between the engine crankshaft and the transmission input shaft you have to use U joints. One of the big issues I have with finding a re power engine for my JD314 is that it does not have u joints so the shaft height is critical. It has fibreglass discs at each end of the shaft to deal with the movement of the engine. The JD317 I have uses U joints so if I re power it would be easier to match up another engine to the shaft. 


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#4 nbent OFFLINE  

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Posted September 28, 2013 - 07:00 PM

most gts i have have u joints from the factory, but on my 317 it was repowered and had a solid shaft that wore out so after looking for a cheap factory shaft i settled on part of a steering column from an older chevy pickup it has a cv joint on one end and a rag joint on the other 


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#5 BairleaFarm OFFLINE  

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Posted September 28, 2013 - 07:22 PM

So if using u joints I can be a little off on my drive line and it would be ok?

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#6 olcowhand ONLINE  

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Posted September 28, 2013 - 07:31 PM

So if using u joints I can be a little off on my drive line and it would be ok?

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Yes, U-joints is the way to go IF you aren't going to use your rear pto.  Using a U-joint & side loading them with the pto pulley drive system WILL give problems.  The Snapper & Massey do not have any sort of flex joint due to having rear pto.  The rubber engine mounts ARE a bad design in my opinion with the semi-solid shaft assemblies.  


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#7 BairleaFarm OFFLINE  

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Posted September 28, 2013 - 07:58 PM

I don't have a rear pto on the snapper. I wasn't necessarily talking about that gt. I am thinking about possibilities for the cub. Long term the snapper is also on my mind.

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#8 olcowhand ONLINE  

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Posted September 28, 2013 - 08:00 PM

I don't have a rear pto on the snapper. I wasn't necessarily talking about that gt. I am thinking about possibilities for the cub. Long term the snapper is also on my mind.

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Then go with U-joints & you won't regret it.  You can have a good angle & still run smooth as silk.


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#9 BairleaFarm OFFLINE  

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Posted September 28, 2013 - 08:08 PM

Thanks. All these thoughts of future project possibilities lol

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