Besides looking at more general criteria to evaluate motor graders, you should inspect specific areas of the motor graders. Conducting a detailed inspection can help you make sure the motor grader is worth purchasing and won't end up costing you more money in immediate maintenance costs.
Below you can find the top tips for buying a used motor grader, helping you know what to inspect before you invest. There are seven things to check before buying a used motor grader.
1. Check the Circle
You'll find moldboard mounted around the motor grader's circle. When a motor grader operator moves the circle's position or angle, the moldboard's angle and tilt will adjust as well. If the circle hasn't been maintained properly, it'll be much more difficult to complete fine grading tasks. Since the circle is so crucial to your moldboards and your motor grader's ability to complete fine grading tasks, you must inspect it carefully.
Start by looking at the surface to see if it has any places where there's uneven wear. If uneven wear is present, the circle may be improperly aligned, leading to damage to the pinion gear teeth. Shims can sometimes be used to ensure the circle remains properly aligned, especially if the circle has some areas that are worn down. If you notice shims, you can start the motor grader and see if its circle can go through its full range motion without play.
2. Check the Frame
One of the easiest checks you can do is to inspect the frame of the motor grader before you purchase it. Look for any cracks or other signs of damage. Additionally, be on the lookout for fishplates, which are metal reinforcements installed on one side or another of a crack to help repair it. While fishplates aren't necessarily a bad sign, ensure an experienced and professional welder installed them.
3. Check Moldboards
You should inspect the cutting edge of a moldboard to ensure it's still on straight. This section should be bolted across the bottom and along the sides of the moldboard. Inspect the moldboard's cutting edge to see if its center has cupped due to soil or rock wearing it down.
It's important to always replace the cutting edge on time, as it's much more expensive to replace a moldboard than it is a cutting edge.