600 vs 8n

[duckrock]

The auburn trencher I just bought came with a right angle drive and was orginially on a 600. Will the bolt patterns and splines from the 600 and 8N be the same or different?

 

[Dave in MS]

I'm not familliar with your trencher or the drive, but I do know that you are going to have to look at the trencher and measure the ID of the coupler. The 8N PTO shaft is 1 1/8" dia. A 600 can be 1 1/8" or 1 3/8" dia. As for the bolt holes lining up, if the drive bolts to the PTO shaft cover, it should be OK since both tractors with the smaller shaft use the same cover. The larger shaft uses a different cover, but has the same bolt circle.

 

[Ultradog MN]

I thought the 1 1/8" pto ended with the NAA and from 600 on it was all 1 3/8".
Someone correct me if I'm wrong.

 

[Larry NCKS]

You're wrong. My dad had an 850 that had the small 1-1/8 shaft.

I always hated those danged adapter sleeves that were simply a glove on the small shaft so that one could use the 1 3/8 PTO on it without adding length to the shaft. just about every time one uncoupled the thing was fractured and fell in peices on the ground.

 

[mike wallace]

My 55 model 600 had a 1 1/8" PTO. I changed it over after years of using a bushing.

 

[Dave in MS]

My 640 came with a 1 1/8" shaft and an adapter sleeve that wiggled on the splines enough to eventually ruin the shaft which was replaced with the larger one. The tractor was 27 years old when I bought it from the original owner, and as I remember, that adapter sleeve lengthened the shaft enough that the PTO cover could not be installed over it.

 

[Jim.UT]

My 850 had a 1-1/8" shaft when I bought it in 1999. I changed it to the larger size. My 850 is a 1955 and pretty original. Still has a vane pump.