Moss Motors, Ltd

I purchased the 900 MM heavy belt from Moss for my 62 TR4. Absolutely no way in hell I can install this belt. I consulted Moss tech rep and he suggested an alternate part that measeres 975M.M. This belt if far too large, there is not enough adjustment on the generator to take up the slack before it hits the inside wheel well. I thought perhaps my generator pully was oversized but according to the rep it is not. I've tried Napa they have the heavy type belt by Gates but cannot seem to fit my application. My next move is going to be shopping the farm equipment parts dealers.I've been down for over a week for lack of a FAN BELT!!  Comments, ideas, suggestions anyone?    

Can't you do the trick of looping a string around your pulleys, to find the length you need, and take that to the parts store? I'm sorry to hear you're having such problems. I'm not in Tech here at Moss (just Marketing) so I'm not familiar with your issues with our part.

Christine 

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Christine Knight
Marketing Assistant

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Disclaimer:Working on automobiles is inherently dangerous. Moss Motors, Ltd. is not liable for injury or damage due to incorrect installation or use of their products. All products are sold with the understanding that the safe and proper installation and use of the products is the customer’s responsibility. Follow factory workshop manual procedures and instructions, but use current shop safety standards and common sense. Some tasks will require professional advice or services which Moss Motors cannot provide.

Did you ever find out the right size belt?  If you did , where did you find it, and from whom?. 

 I also have a  problem with my Tr4a after converting alternator for  generator. The closest  cogged belt I found is a Gate  TR 24400  ( 20 x 970 mm inside circunference, or 3/4" x 40 3/4 " outside circ. ) , but it is a bit  longer than ideal   so the alternator adjustment hits the inner right fender.  When adjusting to the extreme  the belt slightly rubs against the crossmember tube .  I can use it as it is , but if the belt elongates with time I will have problems.  I have the original wide pulleys.

What I need is 20 x 950 or 960 mm.  Have contacted many companies but none can provide what I need.  Anything you can ad to my problem.

Thanks

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robert diaz

Have you tried with the assistance of another person manually rotating the engine with a spanner on the front crank nut, while you carefully feed the belt on the last pulley?  With the dynamo as loose as it will go.  Early car owners would probably use the starting handle to rotate the engine.

Once fitted and correctly adjusted, run the car for a while say 500 miles to get the belt stretched, remove the belt and fit another new one with the technique that worked.  Keep the run - in belt as a spare that you know will be able to be fitted by one person at the side of the road in the event of a failure. It stores perfectly in the spare wheel.  This assumes your engine mounts hav'n't sunk and you do not need to jack the sump up to get the belt passed the steering rack.......but that is another issue

Do not over-tighten the belt on the pulleys or you will be in for a dynamo and/or water pump fairly quickly.   See the service manual for instructions.

As an aside - Remember also the front engine plate for alternator cars is different to dynamo cars. (originally factory fitted items only) It positions the unit further from the block, hence the belt increased in length for alternator fitment.

 How did the old belt compare in size with the replacement - It has happened before that the supplier of belts has got it wrong and supplied one measured incorrectly mixed in the batch.

Cheers

Peter W

 Sorry for not  having replied sooner,  but took a while to find the belt.

Finally I bought four belts of approximate similar dimensions  and one worked, gates TR28400 ( 7/8" x 40-5/8" ...22mm x 1032mm), also cogged , although a bit thicker but  fit   as well as the original TR4a belt...although longer and slightly wider.  I returned the unused belts to the parts supplier where they gladly took them back.  Had  the  original wide pulley redrilled to fit the new alternator.

To fit  the new longer belt  I  unmounted the alternator and maneuvered it  to engage the pulley into the belt,   then remounted the alternator.  It fitted perfectly , without further adjustment.   When done,  I had  the correct belt tension and  no more than 1/2 in.  left for future belt adjustment.

 Peter W, your advise about the spare belt was greatly appreciated.

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robert diaz