First, it's important to clarify the factory production year. The engine and the front part of the tractor should have a factory plate that shows the manufacturing date. Additionally, you should ask the car owner for the purchase date to determine how long the vehicle has been in use and assess its overall age and condition.
Next, examine the overall condition of the main chassis and tires. Before making a purchase, check the wear level of the main vehicle and the tractor. If the tire treads are smooth and show no signs of depth, it may indicate that the tires are worn out and have little value left. Also, inspect the tires for any scratches, cuts, or uneven wear that might suggest improper maintenance or past damage.
Third, check the technical condition of the locomotive’s transmission system. Start by visually inspecting the outside for cracks, leaks, or signs of damage. Then, test the gear shifting mechanism—ensure it is smooth and accurate, with no hesitation or grinding when changing gears. Listen for unusual noises during operation and check if the chassis is bent or warped, which could indicate prior accidents or structural issues.
Fourth, evaluate the engine's horsepower performance. If the engine doesn’t hold pressure when cranking the crankshaft, it may be a sign of serious internal wear. However, if you hear a clear oiling sound while cranking under reduced pressure, it suggests a smaller drop in power. Once the engine starts, listen carefully—if there's a heavy knocking sound from the back, it could indicate excessive clearance in the crankshaft or connecting rod, which is a serious mechanical issue that needs attention.
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