Implementing Total Productive Maintenance: A Hands‑On Cleaning Case Study

During a recent Total Productive Maintenance (TPM) workshop, we turned theory into practice by performing a comprehensive cleaning of a critical production machine.

While the primary goal was to restore the machine’s appearance, the process also served as a live inspection. We targeted hard‑to‑reach areas that operators typically overlook, uncovering a range of maintenance issues that required immediate attention.

As we disassembled sections of the machine, several technicians remarked, “I never knew that before,” and “I can’t believe how much dirt and chips were under here.” Their reactions highlighted how routine maintenance can reveal hidden wear and tear.

Our most significant discovery was a substantial tear in the protective sheath covering the main control wiring beneath the chip conveyor system. This defect would have remained invisible during standard visual inspections.

Unprotected wiring poses two critical risks: costly downtime from potential electrical failures and serious safety hazards, including electrocution. According to the OEE framework, preventing loss of life supersedes all other loss categories.

Root‑cause analysis traced the problem to the machine’s original design—specifically, a thinner sheath material, plastic elbow joints, and suboptimal wiring routing under the conveyor. These factors compromised the cable’s integrity.

The corrective plan involved installing thicker, more durable sheathing and cast‑metal elbow joints. We rerouted the wiring to the machine’s rear, keeping it clear of the conveyor system and reducing future maintenance burdens.

Through these corrective and preventive actions, the machine’s reliability, efficiency, and safety were significantly enhanced, ensuring a higher availability for production.