880joe Posted August 19, 2021 Share Posted August 19, 2021 Where is the tractor protection valve at on a 99 CH mack? Quote Link to comment Share on other sites More sharing options...
Vmac3 Posted August 20, 2021 Share Posted August 20, 2021 Its on the fire wall above the steering shaft. V Quote Link to comment Share on other sites More sharing options...
880joe Posted August 20, 2021 Author Share Posted August 20, 2021 Thanks V I'll have a look and see if I can find it Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted August 20, 2021 Share Posted August 20, 2021 There is usually one on the firewall, left of the steering column. its flat looking with a round shape to it and the trailer lines go through it... if not....look at the back of the cab where the trailer lines hook up, for a roundish, 4 inch'ish long valve with one end looking like an air governor. if you have this valve there, then you found it. .. Why I cant tell you exactly, just blows my mind.... I dont ever mess with 'em...jojo Quote Link to comment Share on other sites More sharing options...
880joe Posted August 21, 2021 Author Share Posted August 21, 2021 I believe I know what you're talking about on the firewall. Been driving these CH's for over 20 years first time I've needed to work on that part of truck 1 Quote Link to comment Share on other sites More sharing options...
Vmac3 Posted August 21, 2021 Share Posted August 21, 2021 2 hours ago, 880joe said: Thanks V I'll have a look and see if I can find it My pleasure. 1 Quote Link to comment Share on other sites More sharing options...
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