I have a 2003 Terex HR16. Motor runs strong. Problem is the hydraulic seems weak. Although the Blade works good and the boom will lift the machine well off the ground, when crowding in the stick or swinging the house to sweep soil back into the trench it will hardly move it. Having just replaced the hydraulic oil and filters I was wondering if there are any other inline filters or adjustments that could be made to increase the pressure. The slew has a couple of adjustment points. I have attached a picture. What do the two adjustment effect? Anyone have a manual they would like to sell?