Removing Cutter Drive Sprocket on old Groundsman

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Scott S
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Joined: 06/04/2020 - 17:25
Removing Cutter Drive Sprocket on old Groundsman

Hello All,

I recently purchased an Atco Groundsman 34 (circa 1975, I think) to strip, refurbish and rebuild as a bit of a springtime project. The strip down has been progressing well, until I reached the point of removing the sprocket from the cutter drive control. Can anyone tell me how I go about removing the collar (unsure of the correct term) to allow me to remove the 2 sprockets behind it, circled in pictures below.

Also, when testing the mower before commencing the strip down, the force of the clutch engaging would cause the collar to jump from its disengaged position to engaged, is this a known issue and is there a way to stop it from happening?

Thanks for any assistance in advance.

Scott

wristpin
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Joined: 23/05/2012 - 22:09
Years since I worked on one ;

Years since I worked on one ; and then not very often!  This illustrated parts list suggests that the collar** with the two flats unscrews and taking into account that it is "driven " I'm guessing a conventional right hand thread - but.......!

And, Yes, jumping into engagement was an issue on older worn machines . With one exception the few that I saw had Villiers Mk 25 engines. 

https://www.dropbox.com/s/6ai71b1dnydgaje/Atco%20Groundsman%20illustrate...

** H355 Sleeve nut

hortimech
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Joined: 08/04/2013 - 17:02
Everything Wristpin said,

Everything Wristpin said, plus the thing that wears first and causes the jumping into gear is a very small pin in the splined sleeve (H353 on the parts diagram). This pin was never available as a separate spare part, but you can replace it, it just pulls out (grip with side cutting pliers and lever out). Once you have got it out, you just need something to replace it with, we used the shank of a 'pop' rivet, dressed to length with a file.

 

Scott S
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Joined: 06/04/2020 - 17:25
Gents, thank you so much for

Gents, thank you so much for the information. I shall give the suggestions from both of you ago.

Thank you again.

Scott