Fault Phenomenon: Dynapac F300W paver veers left when driving straight.

Troubleshooting Process:
– Checked track tension: tension inconsistent between sides.
– Checked travel motors: severe internal leakage in right motor.
– Checked multi-way valve: travel proportional valve zero offset.
– Checked controller: inconsistent left/right speed settings.

Root Cause: Internal wear in the right travel motor causes internal leakage, resulting in lower speed under the same pressure compared to the left side, causing veering.

Required Parts: Repair or replace right travel motor.