I need help with the manual dump on my spread

Most of those manual valves have to be twisted 1/2 turn to move them. They have a lock tab to prevent unintended change.

 

Post the back of the switch. I'd like to see how the valve is plumbed.

 

looks like it has to be pulled up, but i would imagine it is set up, so i would replace it!!

 

looks like a push pull knob

 

You could take an old power divider/fifth wheel slider switch and put it in its place, that will work.

 

I had the same set up on my 2003 Dane. I left that valve and put an electric dump on rear axle. It's a nice set-up. You will be happy with that. My electric valve dumps just the rear and the manual one you have shown dumps both. It was pretty cheap to do yourself.

 

best bet if you want a setup to dump as you want. go ahead and switch it to electric. i would use a dual dump vavle setup. one on the front axle one on the rear. here is a list of parts. 2 pick up style trailer plug kits( one male one female per kit) 4 wires about 75 feet long each. 4 wires about 15 feet long black tape wire cover if you want to cover the wires. 2 toggle switchs and enough wire to run from mounting spot to back of cab. start by finding a spot on your trailer to drill a hole in for the female trailer connector. drill it out. mark the 4 long wires with 4 different colors IE one wire had red wire ties on both ends. otherwise you will play games wiring up later. run the 4 75 feet wire thru the trailer following the factory light wiring harness back the the axles. install the vavle on the front and back axles. wire up the vavles taking note what wire is what. ie hot wire to front axles is red ground is blue hot to rear is purple ground is yellow.mount the second female to your tractor next make a pig tail to go between the now you can let it hang on its own or zip tie it to your other pig tail giving it coil. now just mount you switches and wire them in and test. one toggle will work the front one the back.