// Q&A · Maintenance & Troubleshooting
Excavator won't move on either side: what can cause that?
Expert Answer
If an excavator won’t move on either side, the problem is often in the travel system rather than the boom or bucket hydraulics. Common causes include a failed travel motor/final drive, a brake that isn’t releasing, a hydraulic supply issue, or a control/solenoid problem. You can also check for a mechanical lockup, contaminated oil, or a tension issue that makes the machine seem stuck. If one side is completely dead, compare case drain flow and pressure with the working side, if available, to help isolate the fault. If you need a replacement travel motor or final drive, VANROCK Drives sells brand-new OEM-specification units online at vanrockdrives.com. We ship fully assembled, filled with oil, with free express shipping, duties included, and every unit is covered by a Limited Lifetime Warranty. Caterpillar and other OEM names are used only for fitment reference; VANROCK Drives is an independent supplier not affiliated with any OEM.
Answered by VANROCK specialists · Published 8/8/2026
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