A/C belt tensioner pressure regulator

[tyreman]

I have searched for any recent posts about the A/C belt tensioner but everything looks to be over 9-10 years old.
Trying to figure out if my air leak is an issue to be fixed, adjustment needed or normal behavior. My air pressure regulator leaks out the little weep hole at the back of the same air valve, any suggestions welcomed! 

[chessie4905]

Usually a leak from weep hole means diaphragm has deteoriated to the point of developing a leak. I dont know if diaphragm is available separately. You could check with Luke@ U.S. Coach.

[tyreman]

Would it be easier to replace diaphragm or entire regulator? 

[buswarrior]

On much of our bus parts, a whole unit isn't out of line.

You buy a kit, and don't know how to evaluate the pieces, as to whether they are serviceable... and it leaks again...

Or break it trying to disassemble... and have to buy a whole one...

And take all that time on one little bit, instead of re and re and moving on to the next job...

All depends how you want to spend your time and money.

And how frustrating it is to end up no further ahead, if the reibuild goes wrong.

Those are the failures that doom the psychology of the whole project.

Happy coaching!
Buswarrior

[chessie4905]

Give Luke a call and run it by him. He'll honostly tell you whether replacing the diaphram is worth the time compared to replacing the unit and price difference.

[tyreman]

Thanks for your info and after checking around was over $200 for a replacement. Talked with Luke today and suggested the rebuild kit for under 40 bucks. :-)

[Boomer]

You could permanently eliminate the problem for about 5 bucks by installing a manual tensioner (turnbuckle).

[wildbob24]

Doing what Boomer recommends actually eliminates 3 potential leaks: the regulator, the valve and the cylinder. I second his suggestion.

Bob

[GnarlyBus]

$200 seems high to me but what do I know. Do you know what part number it is? My mc9 uses a Williams controls WM279 I believe. Mine leaks too and is on the list for repair.

Any reason this one wouldn't work?

https://www.ebay.com/itm/Williams-130663-WM279E3-Self-Relieving-Pressure-Regulator-New-/263408567938?nav=SEARCH

[Dave5Cs]

4F-22-34 Pressure Regulating valve

https://www.witmermotorservice.com/4F-22-34R-MCI-Coach-Pressure-Regulator-Valve/item/4F-22-34R