10. Clean debris from the hydraulic lift, drives,mufflers, and engine after each use; refer toRemoving Debris from the Machine (page 40).Operating Tips• Clean the area of trash, branches, and rocksbefore operating to prevent equipment damage.• Always use full throttle (maximum engine speed)when grinding.• Cut the edges of the stump for more efficientgrinding. Once your cutting swath is close to 1/4of the wheel diameter, lower the grinder and begincutting on the edge again.g013671Figure 19• Listen to the engine and watch the grinder wheelspeed to maintain the speed of the wheel. Slowdown the head sweep by feathering the joystick ascutting becomes difficult.• As you grind from left to right, most of the debrisgoes to the left of the grinder wheel. When yougrind from the right to left, the debris goes to theright.• You may also grind a stump from the side to lessenturf damage.After OperationAfter Operation SafetyGeneral Safety• Park the machine on a level surface, disengagethe grinder hydraulics, lower the grinder, engagethe parking brake, shut off the engine, and removethe key. Wait for all movement to stop and allowthe machine to cool before adjusting, servicing,cleaning, or storing it.• Clean debris from the drives, mufflers, and engineto help prevent fires. Clean up oil or fuel spills.• Keep all parts in good working condition and allhardware tightened.• Use care when loading or unloading the machineinto a trailer or truck.Moving a Non-FunctioningMachineImportant: Do not tow or pull the machinewithout first opening the tow valves, or you willdamage the hydraulic system.1. Engage the parking brake and lower the grinder.2. Shut off the engine and remove the key.3. Remove the bottom shield.4. Using a wrench, turn the tow valves on thehydraulic pumps twice counter-clockwise (Figure20).g013179Figure 201. Tow valves5. Install the bottom shield and tow the machineas required.6. After repairing the machine, close the tow valvesbefore operating it.17