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Hi everyone,
our open-pit loading shovel suffered a sudden power drop on the main crawler drive during yesterday’s heavy rock haul. The operator reported a harsh burning oil smell right after a metallic clunk echoed through the chassis under full incline torque.
When we pulled the side maintenance cover, we found heavy carbon sludge along with dark metal flaking inside the housing.
The site supervisor suspects continuous overload caused the internal wet clutch plates to slip and overheat. Has anyone dealt with thermal clutch slippage on a heavy-duty Cotta gearbox? We need advice on rebuilding or replacing it.
Thanks in advance
Hi everyone, a burning oil smell accompanied by metallic flaking indicates that extreme thermal stress has glazed your clutch friction plates and contaminated the fluid system.
Continuous high-torque operation on heavy mining shovel inclines forces slipping clutch surfaces to generate intense heat, which rapidly degrades precision tolerances and scores gear teeth.
Do not attempt to operate the drive under load, as burnt friction material will clog internal oil galleries and cause total shaft lockup. Drain the contaminated fluid, inspect the clutch pack, and check for housing fractures.
Sourcing original components for your Cotta gearbox will ensure proper torque transfer. You will restore peak haul capacity after servicing your Cotta gearbox.
