Tony Wells
Senior Member
OK, there probably is a simple answer here, but the coffee is not working yet. I got asked by a customer yesterday about using a dump trailer with a single acting cylinder on a tractor with a pump and valve setup normally they use with a dump trailer with a double acting cylinder. I figured it's possible so I told them "probably". Then I started thinking about it and knowing what I do in general about hydraulics, I began to wonder about the valving specific to the tractors using double acting cylinders. Don't they simply vent the non-pressured end of the cylinder back to the reservoir when moving?
If I try to provide a way to do this, I have to make it idiot proof and make it impossible to connect wrong when they want to use either kind of trailer. My first thought was to just hose back to the reservoir through a check valve on the "down" line. But that assumes the valve handles the release of the "up" side pressure. Never looked all that closely at the system.
Thoughts anyone? Going to go take a look at the first truck they want to attempt this with. It's a Volvo of some model. This idea is all to prevent registration, inspection, and insurance on a single tractor that already has a setup for a single acting cylinder dump trailer. They say this trailer will only be used once in a while. If it were mine, I'd probably just change to a double acting cylinder and be done with it. But it's their money.
If I try to provide a way to do this, I have to make it idiot proof and make it impossible to connect wrong when they want to use either kind of trailer. My first thought was to just hose back to the reservoir through a check valve on the "down" line. But that assumes the valve handles the release of the "up" side pressure. Never looked all that closely at the system.
Thoughts anyone? Going to go take a look at the first truck they want to attempt this with. It's a Volvo of some model. This idea is all to prevent registration, inspection, and insurance on a single tractor that already has a setup for a single acting cylinder dump trailer. They say this trailer will only be used once in a while. If it were mine, I'd probably just change to a double acting cylinder and be done with it. But it's their money.