Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to drive a tractor [title] Look for tractor safety issues. [step] Walk around your tractor doing an inspection before climbing on. Loose wheel lugs, nuts or bolts may need periodic tightening.

Ending1: If you see any of these problems, break the wheel out of place by twisting on the drive belt. [title] Check to see if brake fluid is leaking. Ending2: Find out before driving your tractor if it has any problems. Check valve seals, windshield panels, radiator valves, heater plates, oil indicators, tires and any other work that goes on and off of it. Ending3: If you discover an issue while hauling your tractor, turn it over a few times to see if you need to tighten the screws on the wheel or one wheel. If your tractor has problems, see the color and condition of the wheel before picking it up for repairs. Ending4: [title] Check your tractor's tire pressure. [step] Low pressure in one or more tires may cause instability and create a safety hazard.

Answer format: ending1/ending2/ending3/ending4