Not sure I can help you, but id be making sure its not a warn cylinder first. As far as I know, you will need a pressure gauge to make sure you don't over adjust it. Seems to me it would be more likely for the cylinder to have bad seals vs a valve. Good luck. Might be worth taking it to your local dealer for service...

 

The cylinder isn't showing any signs of leakage and since it's a single acting cylinder I don't think it could be internal leakage. I do have a pressure gauge but can't find any specs online or even any manuals for sale or download. Might have to check with a dealer I suppose but I would like to get ahold of a manual for future issues...

 

Does it snap back quickly when you bring it in or is it normal speed?

 

It comes back at nearly the same speed as the right wing if not a tad slower but it seems pretty normal in that aspect.

 

I can't remember if those valves are adjustable or not and my RT1 truck isn't sitting here at my house...
You can always give it a try, are there flathead screw on top of each valve actuator?

 

Not that I can see, I thought maybe the adjustment would be hidden under a plug somewhere. Maybe the valve itself is going bad and not closing all the way or sealing...

 

There's still RT1 plows in use? Holy crap.

 

Yup, gets used pretty hard too. First boss plow I've ever had and without a doubt the best plow I've ever used. It's built very well, over twenty years old and still going strong...wish I could say the same for the truck it's mounted on, lol.

 

There's still RT1 plows in use? Holy crap.

Yup, gets used pretty hard too. First boss plow I've ever had and without a doubt the best plow I've ever used. It's built very well, over twenty years old and still going strong...wish I could say the same for the truck it's mounted on, lol.

Same here...badass piece of metal. Trucks a piece of dump it's on but the plow and motor/pump are bulletproof, this is the second truck it has been on at that.
After this truck goes away I want to mount the plow to a skid

 

Ok, This is a long shot I know. Yes I too have an old RT1. my pump motor only has 1 pole. The wire diagram shows 2. I believe the pole is positive and hooks to the opposite side of the relay from the battery post. On this system the relay is bolted to the pump motor. My question is, Does the pump motor / pump need to be grounded anywhere other than one little ground that goes from a small post on the relay to frame. ?

 

As long as the pump is bolted to steel it should be OK, but it will not hurt to run a ground cable from one of the mount bolts to the battery.

 

It could be a check valve as easily as as PR valve. Beware of overriding factory relief setting, good way to cause damage elsewhere.