1. Check the hydraulic fluid level. Make sure the hydraulic fluid reservoir is full and free of debris. If the fluid level is low, add hydraulic fluid to the reservoir.
2. Inspect the hydraulic lines. Check the hydraulic lines for leaks, cracks, or other damage. If you find any damage, replace the damaged line.
3. Check the steering cylinder. Inspect the steering cylinder for leaks, cracks, or other damage. If you find any damage, replace the steering cylinder.
4. Check the track tension. Make sure the track tension is correct. If the track tension is too loose, the crawler will not steer properly. If the track tension is too tight, it can damage the crawler.
5. Check the steering linkage. Inspect the steering linkage for wear, loose bolts, or other damage. If you find any damage, replace the damaged parts.
6. Adjust the steering linkage. If the steering linkage is not properly adjusted, the crawler will not steer properly. To adjust the steering linkage, follow the instructions in the crawler's service manual.
7. Test the steering. Once you have repaired the steering problem, test the steering to make sure it is working properly.
If you are not comfortable performing these repairs yourself, you can take the crawler to a John Deere dealer or other qualified repair facility.