Fault Phenomenon: Komatsu D155AX dozer transmission oil level is above the maximum, oil appears foamy, shifting rough.

Troubleshooting Process:
– Checked oil level: level above maximum.
– Checked churning: rotating components churning oil creating foam.
– Checked breather: breather clogged.
– Checked oil type: incorrect oil type.

Root Cause: Overfilling the transmission caused the high-speed rotating gears to churn the oil, creating excessive foam, leading to unstable oil pressure and clutch slippage.

Required Parts: Drain excess transmission oil to the correct level.