Grillo 62M

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10 hours ago, GardenKit said:

 blade then started to spin on the bolt as can be seen from the witness marks on the blade, boss and bolt. This wore the original 10mm hole to 20mm during the 30 minutes of use. ( I have seen this on various mowers)

 

... we do not think so    the  hole through the  blade is too perfectly cut and indeed the blade is pretty hefty.... and Grillo has confirmed that the 20mm hole is correct. To be honest we were sent a new bolt and washers, but we are not convinced that it is a good engineering design, and the same issue will happen again, but in the mean time we have asked for the torque setting for bolt.

[Commando]

... we do not think so    the  hole through the  blade is too perfectly cut and indeed the blade is pretty hefty.... and Grillo has confirmed that the 20mm hole is correct. To be honest we were sent a new bolt and washers, but we are not convinced that it is a good engineering design, and the same issue will happen again, but in the mean time we have asked for the torque setting for bolt.

Any chance you could find a 10mm washer with 20mm outer diameter and radge a fix together. You’ll never get it to centralise otherwise and you’ll end up shaking the whole thing to pieces.

[[email protected]]

thanks,  thats what we feel, ... Ed has now found an email address for the factory in Italy, so we will try and talk to them direct in the new year,... we feel it is for them to come to the same conclusion, not for us to introduce extra components to a brand new machine,.... but we do appreciate everyones thoughts on this forum... it is encouraging to find that everyone agrees with us!

[PeteB]

Too true Helen, ask the supplier and Grillo UK to confirm that nothing is missing and how the blade is located then have the factory confirm this. I would think it is good practice to have an unbalance in the cutting system which will greatly accelerate bearing and shaft wear and if it fails, potentially dangerous too!

 

I cannot believe it is true....

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3 hours ago, PeteB said:

. I would think it is good practice to have an unbalance in the cutting system .......

good practice to have an unbalance   ?      or  not good practice

[monkeybusiness]

14 minutes ago, [email protected] said:

good practice to have an unbalance   ?      or  not good practice

He definitely means not, I think Pete is probably pissed as he’s just broken up for Xmas!…

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😂😂

[[email protected]]

YES!!

 

Finally got a result. I gave up with the dealer (who had said Grillo had confirmed that all the parts I had were correct) and in a final last ditch attempt sent the same photos to Grillo in Italy. Almost by return I received a brilliant long email from Paolo who said things were definitely not right. The photo of the flat face of the boss onto which the blade bolts SHOULD look like the attached drawing. As you see, mine is missing the 20mm step that centres the blade and dished washer. How on earth this could be missing from mine after 30 minutes light use, goodness knows. Mine certainly shows no evidence of any remaining lip - manufacturing fault, maybe? I don't know, but maybe the bolt wasn't torqued up to the necessary 40Nm on initial assembly and that allowed it to spin on the bolt.

 

Anyway, they are sending me all the necessary parts: bolt, washers, boss and blade centre section. Full marks to Grillo for sorting it, even though it took me quite some time, many emails and phone calls to get there. Confidence in Grillo definitely restored.

 

And thanks to all on here that helped.

 

[monkeybusiness]

Good news! Who is the dealer, as they sound like complete muppets? The issue was pretty obvious, even for those of us with no experience of anything made by Grillo…

[Commando]

It almost looks like that boss has been installed upside down?