Tightening stone-holding nut

[Elmer]

Following the instructions on page 157 of the Maintenance & Tips section in the instruction book I apply the 19mm spanner to the nut to tighten it to hold the stone on the shaft.
Tapping the hammer on the spanner, even with the stone held firmly, seems to cause the shaft & honing wheel to turn with the nut.
I resist the obvious temptation to hold the honing wheel! (as instructed)
As soon as I run the grinder the stone slips on the shaft, so obviously the nut in not tight enough.
What should I do, please?
Thanks.
Best, Elmer

[ionut]

You MUST hold on the honing wheel.

Ionut

[Elmer]

Thank you but as a newcomer to this machine I'm reluctant to hold the honing wheel as the book expressly states
"Important: Do not hold the honing wheel as there is a risk of damaging the centre of the drive wheel!"
How best to solve this?
Elmer.

[ionut]

Sorry Elmer, you are right, I forgot you have a T3 machine and my answer was in a context of a T7.

Ionut

[Jeff Farris]

The trick is to get the nut relatively tight by hand, put the wrench on the nut, hold the grindstone, not the honing wheel and tap the wrench with the hammer.

[Elmer]

Thanks to all who replied. I think I've solved it & can now tighten the nut!
Best,
Elmer