jpar19 Posted July 10, 2016 Report Share Posted July 10, 2016 Hi all, Yesterday I fired up the truck (2010 vnl 630) and let it warm up and when I shut it off I heard air leaking from under the hood. I have an air line leaking from a valve that is mounted in-board of the steering shaft. It's mounted on a bracket opposite side of the steering shaft from the dash pass through. I'll try to include a pic. I'm wondering if that's my governor valve? The truck builds air and will release brakes but as soon as you shut the truck off you hear a substantial leak. I know I can replace the o-rings and seal the leak but when I exited the truck I noticed that the brake lights were on and would not go off. I had to disconnect the batteries to get them to go out. Does a substantial air leak cause the brake lights to come on? I tried to pull up on the brake pedal to see if it's the switch on the pedal with no luck. Thanks for the help, it is much appreciated Link to comment Share on other sites More sharing options...
MrSeas Posted July 10, 2016 Report Share Posted July 10, 2016 Does this valve have multiple different colored air lines attached to it? Is the air escaping out of the end of the valve opposite the firewall? Do you have a "Trolly" trailer brake lever? Link to comment Share on other sites More sharing options...
jpar19 Posted July 10, 2016 Author Report Share Posted July 10, 2016 Yes, it does have a trolley bar. This valve has 2 orange lines and 2 black lines going to it. Link to comment Share on other sites More sharing options...
Broncohauler Posted July 10, 2016 Report Share Posted July 10, 2016 Check to make sure the trolley valve is all the way off. We had a Lot of drivers over the years accidentally pull it on even a small amount and have the same issue. Link to comment Share on other sites More sharing options...
MrSeas Posted July 10, 2016 Report Share Posted July 10, 2016 Make sure your trolley is not on just a tad bit. Sometimes they don't return to the "off" position. That may explain the air loss and the brake lights on.. Is the valve cylindrical? Link to comment Share on other sites More sharing options...
jpar19 Posted July 10, 2016 Author Report Share Posted July 10, 2016 thanks, I'll try that yes, it is a cylindrical valve. That would engage the brake lights if slightly deployed? Link to comment Share on other sites More sharing options...
jpar19 Posted July 10, 2016 Author Report Share Posted July 10, 2016 Here is the valve with the orange lines going to it Link to comment Share on other sites More sharing options...
MrSeas Posted July 10, 2016 Report Share Posted July 10, 2016 Sorry don't know what that valve is for. Can you trace the airlines to see where the lines go? Link to comment Share on other sites More sharing options...
jpar19 Posted July 10, 2016 Author Report Share Posted July 10, 2016 They actually go over to the pass through manifold Link to comment Share on other sites More sharing options...
jpar19 Posted July 11, 2016 Author Report Share Posted July 11, 2016 It was the trolley bar! it was deployed only ever so slightly All i had to do was manually push it up. Thanks to all that responded. Love this forum, always learning something. Thanks for passing on some wisdom Link to comment Share on other sites More sharing options...
Broncohauler Posted July 12, 2016 Report Share Posted July 12, 2016 It was the trolley bar! it was deployed only ever so slightly All i had to do was manually push it up. Thanks to all that responded. Love this forum, always learning something. Thanks for passing on some wisdomSeen it many times over the years glad it worked out. Link to comment Share on other sites More sharing options...
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