jo beau m300 bolt failure

[haljam]

Hi, I am running an 18 month old j b m300 pro chipper, and am having problems with the alum bolts that hold the funnel on. There are (were) 8 of these bolts and 3 have now sheared whilst in use -not whilst tightening. They have not been over tightened, and have the original washer fitted. Last job I was running on just 6 bolts (one in each corner + 1 each side), but keeping an eye on them and one rattled loose. On inspection that was half sheared through. I Have now ordered a new set so I have some spares. Anyone else had problems with this?

[burrell_]

my m400 is just over 2 years old ent n ever had that problem

go fine a local engneer and see if he can drill and tap a over size bolt a bsf (british standered fine ) tread thats what i would do (but i would do it my self ) best of luck mate

[Breezeblock]

pics please would help.