On our graders we have bought a Hydronord constant pressure system.
The system is made by a small firm in Nothern Sweden, Father&Son i have heard.
The firm has been contacted på Cat, they want to buy them up and offer the system as a add on for cat graders.
The product is a electro hydraulic valveblock that constantly monitor the pressure in your main sylinders. Monitors many times pr second.
Inside the cab you get a controll panel that have a number of buttons, se picture.
Her you can put in a digital number for the pressure you want. Between -50 and +50 (what i recall; have used from -20 to +30)
The number is a number and has nothing to do with the real pressure. I have found that -16 is the float/lift value on my graders. Lower means it lifts, higher means pressure.
On the controll there is increase(øke), decrease(minske) and a button for automatic/manuall. There is also a button for lift(løft).(Norwegian class here now) It also has a inbuilt floatfunction where you press two buttons.
The picture here is taken when shut off, thats way there is no numbers in it.
In the grader video you can se the digits.
When in manual, the grader works as normal, in auto the blade goes down and it ceeps a constant pressure.(what you have added)
If you want to grade a road, you pitch the blade after how aggressive you want the cut, and adjust the pressure to what you want.
And you can have float on one side and pressure on the other.
If you want to make adjustments you can owerride with the controls, if you wants to lift for some seconds you lift that side and lets go. Then it goes back to the preset value. Same goes if you want to add pressure for a reason.(but be carefull with the bits on asphalt
)
So Way use it?
Well if you mount carbide bits for winter maintenance, it is a must.
I have seen some pictures of them here on the forum, so it is sold in the states also.
Those round bits is harder than ice but wears out fast on asphalt, and makes nice tracks too.
If you dont watch out you will wear them out in a minute, if you go through the ice and hits asphalt with pressure on the blade.
So this system is made in a way that you never will put to much pressure on the bits.(as long as you ceep pressure under the limit)
A set of carbide boards will last the whole winter.(with this system) The serrated ones may last a week.
When grading ice over a speedbump, the system will cut the equal amount all the way over.(as an example)
A system with a acumulator will cut more on the top than on the bottom, because the pressure increases when the nitrogen gets compressed.
And you can get bounsing on those systems.
Outside i got a box on the left side with the hydraulic hoses and a cable to the inside. You can see it on the side of the main frame.
The system is made by a small firm in Nothern Sweden, Father&Son i have heard.
The firm has been contacted på Cat, they want to buy them up and offer the system as a add on for cat graders.
The product is a electro hydraulic valveblock that constantly monitor the pressure in your main sylinders. Monitors many times pr second.
Inside the cab you get a controll panel that have a number of buttons, se picture.
Her you can put in a digital number for the pressure you want. Between -50 and +50 (what i recall; have used from -20 to +30)
The number is a number and has nothing to do with the real pressure. I have found that -16 is the float/lift value on my graders. Lower means it lifts, higher means pressure.
On the controll there is increase(øke), decrease(minske) and a button for automatic/manuall. There is also a button for lift(løft).(Norwegian class here now) It also has a inbuilt floatfunction where you press two buttons.
The picture here is taken when shut off, thats way there is no numbers in it.
In the grader video you can se the digits.
When in manual, the grader works as normal, in auto the blade goes down and it ceeps a constant pressure.(what you have added)
If you want to grade a road, you pitch the blade after how aggressive you want the cut, and adjust the pressure to what you want.
And you can have float on one side and pressure on the other.
If you want to make adjustments you can owerride with the controls, if you wants to lift for some seconds you lift that side and lets go. Then it goes back to the preset value. Same goes if you want to add pressure for a reason.(but be carefull with the bits on asphalt
)So Way use it?
Well if you mount carbide bits for winter maintenance, it is a must.
I have seen some pictures of them here on the forum, so it is sold in the states also.
Those round bits is harder than ice but wears out fast on asphalt, and makes nice tracks too.
If you dont watch out you will wear them out in a minute, if you go through the ice and hits asphalt with pressure on the blade.
So this system is made in a way that you never will put to much pressure on the bits.(as long as you ceep pressure under the limit)
A set of carbide boards will last the whole winter.(with this system) The serrated ones may last a week.
When grading ice over a speedbump, the system will cut the equal amount all the way over.(as an example)
A system with a acumulator will cut more on the top than on the bottom, because the pressure increases when the nitrogen gets compressed.
And you can get bounsing on those systems.
Outside i got a box on the left side with the hydraulic hoses and a cable to the inside. You can see it on the side of the main frame.
