Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Diagnosis help

I think 10mm is on the tight side. It will cause the bevel box to whine just like a generator as well as increasing the load on the bearings and seals. Somewhere between what you had before and what it is set at now will be the sweet spot. I've been keeping mine at around 20mm deflection and can almost twist the belt 90 degrees. Have never slipped once. The people at Super Max recommend the belt being on the loose side but not too loose so as to ratchet (slip a tooth). Once there it should stay. The belt might stretch a bit when new but they are extremely tough and should not have to be adjusted at all afterwards.

Morgan should give either a deflection figure mid belt travel as above or a tension setting (you can go really techy and record the frequency of the belt when plucked)

A Kricket belt tension gauge is really simple to use.

Surely thats assuming Morgan know better ?

I've read that the correct procedure requires a belt tensioning meter that checks the natural frequency of the belt. I've read that the belt should be initially tensioned to 75 Hz and after break-in should read no more than 50 Hz.

Here's an example of the special meter. They are very expensive.

http://www.gates.com/products/industrial...and-accessories

It might be useful if someone with a freshly factory tightened belt use a fish scale and a ruler to measure the force vs deflection of the belt. That's a quick and easy way to do it.

That would be keep us from floundering about, even without the hands of a sturgeon ...



ibegs

Sounds fishy to me

Belt tension has been readjusted to 17mm and the bevel box whine and generator sound is gone.

Thanks for all the feedback!

I suspect the correct thing to do is to run it as loose as is possible without it ratcheting. If it does ratchet, tighten just a little and try again, until it stops, then measure the deflection and use that as a guide.

I can't help wondering if running the belt too tight is the cause of BB whine, as Micheal suggests. If this is the solution, it justs sounds to easy after all the problems that eveyone has suffered.

This is where we need Mark Evans, or maybe another Mark, to come onto the forum and explain why it needs to be tighter and what work they have done to overcome this problem.