Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Belt trouble

All put back with plate repaied BB moved over about 6 mm belt looks better, we find out tomorrow!

Fingers crossed

100 miles covered today without any problems or unusual noises! Thanks for the offers of help from you guys

Having problems with my belt also. Guide on the wheel sprocket broke.
I removed the remains and centered the wheel as best I could.
Drove and and the belt had moved about 3/8 in off off the rear sprocket which pushed it up against the side of the guide on the bevel box.
Have tried to adjust the belt again but run into trouble, if I move it one way (a minor amount) eventually with many many rotations of the tire it moves to where the belt rubs the tire.
Adjusting it the other way it eventually moves slightly off of the rear sprocket but rubbing on the guide for the bevel box.

Lance,

Try to use a caliper gauge and measure the distance between the adjusting bolt’s head and the adjuster plate. Make it as even as possible on both sides.

Then start rotating the tire forward as fast as you can (at least 15+ full revolutions), and then backwards (15 revolutions). Adjust the bolts until the belt does not move sideways on the sprocket (do adjustments in small increments, like 15 degrees of a turn).

It also helps to start the car and put it in reverse and then 1st gear, rather than rotating manually. You can even use a long stick to pull the clutch in and monitor the movement yourself.

Kankel, Thank you. That is essentially what I am trying to do. Have replaced the bevel box on this car so not sure if I got something misaligned when I did that. Thought it could only go in one way??

I believe skullmog just re-aligned his, he might be able to tell more?

I fitted Phil Bleazeys Bevel Box mount kit last winter and spent quite a lot of time trying to get the drive belt running on the sprockets without pushing hard up against the front and rear sprocket guide plates, the rear wheel pointing straight forward and the belt tension about right. Not an easy task. I found that the BB needed to be positioned about as far to the LH side as you could get to achieve this.

My belt had always tracked fairly well from new as the BB was mounted towards the LH side. When I took it all apart to fit Phils kit I found that the LH swing arm bearing plastic dust cap had been left off at manufacture, there wasn't enough space for it to have fallen off. The BB sprocket was almost touching the swing arm bearing housing. I had to replace the corroded swing arm bearing that had been left open to the elements for several years.

On refitting the BB I aligned the sprockets using a piece of tensioned string across both sprocket faces, not very high tech but it works. Get the rear wheel laser aligned first and pointing squarely at the centre of the front chassis. This was the point where I found the clearance between the BB and the LH swing arm bearing housing was minimal and saw why the plastic dust cap had been left off originally. I stuck some alloy speed tape over to keep the dirt and dust out of the swing arm bearing. If you look at the photo you can see the speed tape, the minimal clearance and the belt not running against the front sprocket guide plate.

You could mount the swing arm off centre as the pivots are adjustable, this could be a possibility if your BB mounting is a standard type and fixed. I mounted the swing arm fairly centrally and offset the BB slightly as Phils kit allowed you to do this.

Thanks Planenut, Will pull the interior out tomorrow and see if I have any room to move the bevel box.

Nice description and photo Planenut.