Installing dump valve

Intermodal Driver. Hazmat Driver. Feb 18, 1. We just got an '07 Pete dump truck with air ride suspension. We've had trucks with air ride in the past but they all had a dump valve on the dash which comes in very handy when needing to dump material in off level situations. This new truck does not have a suspension dump switch and I'm trying to find out how big of a pain this would be to put in.

The problem is I'm not sure how the factory dump valves work. An issue I foresee is that the truck may still try to fill the bags while the valve that I have installed is letting the air out at the same time, so air would be constantly flowing out and draining the air tanks. Do the dash panels just pop out or is there a tip I need to know?

I see no screws Thanks for the help! Wait, employers can't reach you! By checking this box and clicking the "Send me job offers" button below. I understand that my consent is not required to get job alerts. Feb 19, 2. Pablo-UA , Feb 19, Feb 19, 3. What I have seen done and theres a couple differant ways to do it. You could install a electric controled pilot valve that will be hooked into your leveling valve.

You could hook the wires up to the pto engage light so when pto is engaged it activates the pilot valve and starts dumping air you will have to run a fused ign power to pilot valve and ground wire through pto indicator switch as this is a ground control on pto indicator light.. Or you could get a air controlled pilot valve hooked in to leveling valve and tie sensing air line in to your Pto air feed same idea as the electric. Third option for auto dump would be air controlled pilot valve hooked into leveling valve but hook the control air line into your hoist lever.

The above ways will be automatic driver does'nt have to remember to throw a switch it will start dumping suspension automatically whenever pto or hoist is engaged depending on how you chose to hook it up.

If you use a pilot valve you wont have to worry about air loss as the pilot valve will block the air supply to the leveling valve and open a port to allow air in suspension to be dumped out. I had to install a similar system in to our three axle float only I chose a manual push button valve mounted at rear of trailer by becon switch just for simplicity not for auto dump option. Feb 19, 4. We use to install a dump system in Freightliner cab overs, it worked off the back-up switch, as some drivers could not control the clutch with the air-ride cab bouncing we used a solinoid electric over air on the frame tapped into the airline for the cab suspension air, we had an override switch mounted in the dash so he could manually dump the system we used a diode.

You would only need an electric switch, on the dash a solinoid in the frame tapped into the suspension air supply hose. Just a thought! JohnP3 , Feb 19, Feb 19, 5. Those are great ideas but I'd really like to be able to dump the air when I choose, not connected to the PTO etc. There are times when spreading gravel on a long flat road where I wouldn't want the bags dumped.

It's great to dump the air when hooking up to a trailer or even during repair you know. Am I just being too picky?? How does the factory dump valves work? Disconnect the feed lines to the air bags from the T fitting on the HCV. Attach the dump valve to the HCV and reconnect the air suspension feed lines to the T fitting.

Run ground black wire from solenoid valve to the frame. Use sealed butt-connector to splice run of gauge wire from hot red lead out of the solenoid along frame rails and up into the cab behind the dash.

Install single-pole toggle switch in dash and connect one pole to the wire from the solenoid. Wire the other switch pole to a volt power source, such as a circuit breaker. Test the system. When the toggle switch is tripped, the dump valve should instantly release suspension pressure.

Position the toggle switch down when this occurs so it correlates to the suspension movement. Business How to: Install driver-operated dump valve Brooke Wisdom. Related Stories. Protect yourself. Volvo VN Pulse: Putting trouble behind you. Know before you tow.