Jensen blade bolts

[leedeerman]

On my Jensen 540 I'm having real trouble getting the blades to correct torque value without the counter sunk bolt spinning on the blade, I can let the Allen key push aganst the bearing as the nut is tighted, but then it's nearly impossible to get the key out, I don't want to hold the key, it puts my hand too close to the blade, and 310nm is allot of force! Anyone else have the same problem, is there a solution? What should be a simple job turns into an hour of swearing.

[treequip]

Tighten them so you can still get the Allen key out then withdraw the key to about half its depth. Once you have a little weight on it the countersinking will grip each other and you will be able to take the key out before fully tightening the fastener

 

The other method is to slim the Allen key a little

[dan494]

I've got a 530 and find it really easy, once the nut has pinched up then the side with the Allen key holds firm on its own without the key whilst I torque the other side. Can get both blades off and on in 20 mins

[leedeerman]

Tighten them so you can still get the Allen key out then withdraw the key to about half its depth. Once you have a little weight on it the countersinking will grip each other and you will be able to take the key out before fully tightening the fastener

 

The other method is to slim the Allen key a little

 

My countersinks won't grip at all, they're clean and free of grease, all genuine parts, really pissing me off now!

[dan494]

Are the bolt/nut and threads clean as well?

[Johny Walker]

i had a 530 , like dan says 20,mins done & dusted ,but the 540 total pain , its actulay a 2,man job even with the fly wheel locked up , may be worth making a tool just for the job ,