Jeffrey 34 Posted Friday at 06:23 PM Share Posted Friday at 06:23 PM Does it matter if this cut off valve is on the bottom or should it be on the top of T valve. Quote Link to comment https://www.bigmacktrucks.com/topic/75805-mack-aset-vgt-turbo-valve/ Share on other sites More sharing options...
Joey Mack Posted Friday at 07:38 PM Share Posted Friday at 07:38 PM Yes, that is a pressure protection valve, and the ball valve is to isolate the VGT controls. i font know why. In previous models that valve was for the engine fan air supply to the celenoid on the radiator frame. Mack Pro, likely knows better than me. Quote Link to comment https://www.bigmacktrucks.com/topic/75805-mack-aset-vgt-turbo-valve/#findComment-579798 Share on other sites More sharing options...
Jeffrey 34 Posted Friday at 07:53 PM Author Share Posted Friday at 07:53 PM Should it be on the bottom like it is now or should I move it to the top that’s the way it was when I bought the truck,but I have seen some that was on the top didn’t know if it made a difference Quote Link to comment https://www.bigmacktrucks.com/topic/75805-mack-aset-vgt-turbo-valve/#findComment-579802 Share on other sites More sharing options...
Joey Mack Posted Friday at 08:15 PM Share Posted Friday at 08:15 PM Im sure i have only seen them on the bottom.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75805-mack-aset-vgt-turbo-valve/#findComment-579805 Share on other sites More sharing options...
The Heinz Posted Friday at 09:18 PM Share Posted Friday at 09:18 PM The VIN I have shows it at the top, so I'm confident it can be in both places and work just the same. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/75805-mack-aset-vgt-turbo-valve/#findComment-579809 Share on other sites More sharing options...
Mackpro Posted 12 hours ago Share Posted 12 hours ago The line coming out of the shut off fitting should go to the VGT actuator spin on air filter housing. When you turn off the air via the shut off valve it dumps the air off the VGT filter, control valve and actuator. This lets you change the spin on air filter without draining all the air in the system. There was a Service Campaign or Product Improvement Campaign to add the shutoff and air filter to the early 2003 ASET AC trucks. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75805-mack-aset-vgt-turbo-valve/#findComment-580025 Share on other sites More sharing options...
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