My Uncle has a John Deere 3038e and the back when we use the attachment it drops either too fast and then we can't stop it while it's dropping. It just doesn't control it accurately is there a way to make that adjustment we just put new filters and new hydraulic fluid in it. It only has 312 hours on it. Can anybody please give me advice please and thank you cause I know that it's gonna cost a lot just to take it for them to turn a few knobs.