[Mgs] Genator strap.

[Robert's New iPad]

  My tensioning method is to go driving on a rainy day, with heater booster, headlamps, radio and anything else electrical switched on, then to listen for belt slip or other indications of slip. I tighten just enough to stop that.
  TDs’ belts are the older-style wider belt. Mine I would tighten just enough to keep it from flipping off the dynamo pulley.  
  MGB workshop manual says, somewhere, 1/2” deflection on the longest span.   At what pressure, one asks. I think that is generally over-tight, and believe that that spec was set for dealer use so that cars were not returned for no-charge tightening in a couple of weeks after belts were renewed. Only my opinion on that.....
  O Fahrenheit yesterday morning in Guilford. Too cold to consider taking MGB outside, even if the garage door had not been frozen closed.
Bob


> On Jan 22, 2019, at 3:24 AM, PaulHunt73 <paulhunt73 at virginmedia.com> wrote:
> 
> I took the suggestion as being an easier way to arrive at the correct tension, not a method of over tensioning it.  However I've only ever had to do it after having refitted the dynamo or alternator after other work, so in the grand scheme of things it's not been that big a deal.  Other than that I don't adjust the belt from one years end to the next, just checking, and I've never suffered from squeal or poor charging from that cause.  I'm looking forward to the discussion about what the tension should be and where and how it is measured :o)
> 
> PaulH.
> 
> ----- Original Message ----- 
>>  It’s easy enough to cobble one’s own, using a quality turnbuckle (rigging screw) from a marine supply source.
>> I question the need, though, as our dynamos have notoriously weak rear bushings, and over-tightening the belt puts unnecessary strain on the bushings.
>