Could it be a leak coming from one of the airlines connection to the valve instead ?Bring back an old topic,
Dose any one have an exploded view of the 4-way protection valve, mine is leaking (I can hear it but have not gotten under the truck to check it out closer) I have a full truck manual but it dose not have an exploded view of the valve. Judging by the photos above, I will pull the front cover off of it and see if there is crud inside it, but a diagram would help too.
I got a slow leak coming from those fittings. When wiggled, one of these hisses louder.
The third pic shows another leak that I found while washing the truck.
277.8 KB Views: 246
151.7 KB Views: 200
270 KB Views: 323