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Massey Harris & Massey Ferguson Tractors Discussion Forum

245 rockshaft

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Author  [Modern View]

01-10-2019 07:28:53

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I ordered a rockshaft from a local salvage yard and received a brand new one which has splines all the way around while my old original has a flat spot with no splines along with the lift arms and the ram arm. The manual said all rockshafts, lift arms and ram have master splines for correct assy. Salvage yard claims he's looking at the parts manual and part# 897567m3 has no master spline. I looked at AGCO parts book and all models of the 245 MF use the same rockshaft.

I suppose I could just grind down any spline all the way across and be good to go. Anybody ever seen one with no master spline? Could this be another part from the land of almost correct?

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DavidP, South Wales

01-10-2019 12:14:39

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 Re: 245 rockshaft in reply to 2tractors, 01-10-2019 07:28:53  
Hello, these shafts MUST have a master spline on all three splines. If no spline is present the risk of damage to the casing is too great. Older tractors had a double spline to mesh with a female spline in the stub arms and ram arm. Todays ones have normal splines but at each end there is a raised section which effectively makes it a double spline and thus the correct relative positions. Do NOT attempt to fit this shaft unless you are 110% sure that you have them correct.
DavidP, South Wales

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01-12-2019 04:46:53

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 Re: 245 rockshaft in reply to DavidP, South Wales, 01-10-2019 12:14:39  
Supplier said all new shafts come with splines all the way around. It does have the makings of a master spline all across where the spline is flat for about 1/8 inch.

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DavidP, South Wales

01-12-2019 06:33:40

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 Re: 245 rockshaft in reply to 2tractors, 01-12-2019 04:46:53  
Yep, that's your master spline. It's only there to ensure that the arms are fitted correctly. Undoubtedly cheaper to make but it works. DavidP

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