Marin Mount Vision - lower linkage keeps working loose

DickBarton

Hi,

This has been an on-going issue for just over 2 months - developed a proper cracking noise and the shop suspected it was the bearings, so they got replaced, but the cracking remained...not only did the cracking remain but the suspension kept working loose.

The bolts were all tightened to the required torque settings and everything felt nice and 'tight' but after 2 miles of riding the bike, the back end is proper wobbling all over the place.

The cracking was still there and the shop called ATB Sales who took a look at the bike - the cracking was caused by the freehub dying - replaced and now a silent bike. They also said the suspension system was loose and replaced the aircraft bolts (the ones that bolt the front and back ends together.

I then fitted these - torqued to the correct settings - 18 newtons - and took the bike for a ride - loosened right off...so I re-tightened the bolts after adding some threadlock to the threads...now, the only bolt that seems to keep working loose is the drive side lower rear bolt...just won't stay tight.

What can I try now to keep this tight and not work loose?

Thanks.

Anonymous

Threadlock?

The Northern Monkey

DickBarton wrote:

so I re-tightened the bolts after adding some threadlock to the threads...

yeehaamcgee wrote:

Threadlock?

bails87

The Northern Monkey wrote:

DickBarton wrote:

so I re-tightened the bolts after adding some threadlock to the threads...

yeehaamcgee wrote:

Threadlock?

Maybe he was just being nice and agreeing with what had been written

More threadlock?

mrfmilo

Much threadlock is needed. My Quake did this, had to tighten it up after every run, bought some threadlock, apply liberally to all linkage bolts - not come loose since

Anonymous

Yes, I meant MOAR THREDLOCKS!
Or, stronger threadlock even.
INcidentally, how are you torquing them? The shafts on mine have an Allen socket in them, you should torque against that, not against the opposing nut. Not sure how much difference it would make, but...

DickBarton

4mm allen key in the other side of the shaft, setting the torque wrench to 18 newtons, attaching torque to 10mm head and turning the bolt...until the torque wrench slips/clicks.

I'll try more threadlock, thanks.