My repair of a tractor parking/trailer supply valve

Good stuff. Fixing things is becoming a lost art. Seems like everything is built to throwaway now.

 

Well freightliners certainly are.

 

nice. hmm...i'm kinda envious of that oring set. is that wrong?

 

I've had mine go to leaking before when I couldn't get to a place to get O-rings. I just took it apart and smeared some grease on the O-rings and put 'er back together. No leaks. Good to go.

 

I have often wondered if that was possible.
I bought a replacement valve a couple years back. Wasn't the same as the original. Directions said to route a hose out the back and loop around to another fitting and do something, and something and then something else.
I took it back for a refund. My valve leaks just a little sometimes. Wiggle the knobs and it stops.
I may try your solution. Thanks for posting.

 

As far as I'm concerned, there's no need to spend the money on a new valve unless it physically breaks. And I've never seen one break. O-rings are easily replaced and it's good as new for a heck of a lot less money.

 

Upon further inspection of your pictures, my leak is from the knobs in front. Not the fittings in the rear.
I still might try it.

 

silicone lube in spray can from Wal-Mart fixes quick connect leaks in 80% cases. time tested. but if o-ring is damaged bad it must be replaced.