My repair of a tractor parking/trailer supply valve

I didn't realize it was possible to take those fittings apart and get to the o-rings. Thanks for the tip.

 

Watch what kind of sprays you use. Some will work at first but then dissolve the O-ring over time. I've found that ATF (type A) in a spray bottle works well and won't swell or melt O-rings...

 

I fix a lot of leaks on volvo specialy on front manifold volvo sells the o rings separate and they are the ones that are supposed to go in air lines harbor freight o rings work the only problem is they do not resist for a long time if you can actually go to a volvo dealer and buy just the orings they come in very handy just 3/8 and 1/4 you should have them in the truck they fix a lot of air leaks quicly.

 

i know what they are really well but the oem last a lot longer in my opinion i change this things out daily about 5 to 10 a day and that is the best i have found.

 

Nothing special on material but the size is more precise

 

Viton is good for oil , coolant, diesel. but it will be cracked fast if you use it for hot air or hot steam environment.

 

Great post my trucker bro! Great tips! I'm having the same prob in my Freightliner. I'm going to head to harbor freight when they open and give it a try! I will let you know how it turns out.