Fault Phenomenon: John Deere 750K dozer hydraulic system contamination suddenly increases, filter alarms.

Troubleshooting Process:
– Checked filter: filter paper burst, frame deformed.
– Checked oil temperature: oil temperature too low, viscosity high.
– Checked pressure differential: differential exceeded design limit.
– Checked quality: filter quality substandard.

Root Cause: Under low-temperature, high-viscosity conditions, the transmission oil filter burst due to excessive pressure differential, allowing contaminants into the system.

Required Parts: Replace with high-quality hydraulic filter and clean system.