Removing the cooling fan blades

[Rover 75 2.0 CDTi]

Hi again,

So my cooling fan blade has become detached from the motor... again. This is the second time it's happened but I can't bring myself to take it back to the same local garage to get all the same rubbish from them.

Looking up the mechanism, I reckon if I take the front bumper off I'll be able to reattach it easily. Looks like it just twists onto some lugs.

Has anyone else had this problem repeatedly? Also, is it possible to remove the blades without taking off that metal bar in front of the fan? If possible, I'd take the current one off and replace it with one from the local scrapyard.

Cheers, Jake