On March 28, 2016 Environmental Products was called to resolve a problem with the hopper not on the Elgin Eagle. They sent out a tech to fix it and he was unable to resolve the problem. We had to release the hydro line to get it come down and close. We drove it to Environmental Products to be worked on and were told the check valve was dirty and they had cleaned it and got it working. A week later we had the same problem. They told us to replace the check valve. I ordered the check valve and we replaced it. Then a week after that the problem came back. The hopper would not close. We took the sweeper in to Environmental Products and they worked on it all day saying the pressure was set to high first. They changed the pressure and it still did not work. They then told us that it was the valve manifold that was bad. And told me the part was 3400.00. After speaking with a shop that handles hydraulic problems they said if it was the manifold then nothing on the hopper would work. We went and got the machine from Environmental Products and took it to another shop. The first on March 28, 2016 cost $602.00. The second repair was $1015.87. They did not know what was wrong with the machine but wanted me to spend another $3400.00 out of our pocket because they thought that might be the issue and the machine still does not run. This company is a joke and scam. Ever since I have bought this truck there was nothing but problems. This was supposed to be a certified pre-owned Elgin Eagle street sweeper. I had nothing but wiring problems and the transmission went a week after we bought it and then again 6 months after that it went again. There is not heat and no AC in the truck and there is supposed to be. Everything still shorts out it. I paid $134,000.00 for the truck. This truck is nothing but a lemon