Fault Phenomenon: CAT rotary drilling rig during operation, the hydraulic tank deforms and collapses, all actions slow down.

Troubleshooting Process:
– Checked breather: tank cap breather clogged with dust.
– Checked return filter: filter clogged causing high back pressure.
– Checked environment: low temperature causing breather icing.
– Checked structure: insufficient tank strength.

Root Cause: The hydraulic tank breather is clogged, creating a vacuum inside the tank during rapid oil return, causing it to collapse.

Required Parts: Hydraulic tank breather filter.