A: A loud clicking or grinding sound from the center of the final drive hub during movement, combined with massive metal chunks found in the gear oil during routine drains.
A: Maintenance crews must clean all old metal flakes from the gearbox cavity and fill the hub compartment to the specified level with fresh gear oil before running the travel motor.
A: Yes, these numbers represent different production series of the same basic 1st carrier and sun gear layout, matching original factory blueprints to guarantee a direct mechanical match.
A: The main framework is cast from premium high-tensile steel and reinforced at maximum stress points, preventing structural cracking or carrier wall distortion from intense undercarriage feedback shocks.






















