Number 73020, a standard Class 5 locomotive, has been in traffic for sixteen days, and goes back to the sheds for cleaning inside and out and a detailed mechanical check-up. A team of men, each with his special job, takes over. Before they are reassembled, the parts are inspected; then steam raising begins again. After vacuum tests by the crew, coal is taken on, water topped up, and less than twenty-seven hours after entering the sheds 73020 is back on duty.

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