Fault Phenomenon: John Deere 850K dozer early wear of the hydraulic pump, system contamination exceeds limits.

Troubleshooting Process:
– Checked suction strainer: strainer metal mesh ruptured.
– Checked oil sample: large metal particles present.
– Checked installation: strainer frame deformed.
– Checked cleaning: strainer damaged by tools during cleaning.

Root Cause: The suction strainer inside the hydraulic tank ruptured, allowing large particles to enter the hydraulic pump, causing wear.

Required Parts: Suction strainer assembly and thorough tank cleaning.