At the bottom of your control lever you have a boot that fits around the lever. The boot is bolted to the support with four bolts. Loosen these four bolts and slide the plate forward. Pull you lever forward to bottom the hydro pump pintle shafts. In this position slide the plate back against the lever. release the lever. Slide the plate back another 1/8" and tighten there. To get the loader to drive straight, move the plate on the faster side back to slow it down until the unit drives straight................................................ If there is a considerable amount of difference in the speed then the lever on top of the hydro pump may be loose. Lift the seat up. Follow the rod that goes from the lever to the hydro pumps. It is attached to a lever clamped to the hydro pump shaft. The lever is clamped with a 3/8" bolt. Tighten the bolt.