When working with heavy machinery such as excavators, several safety precautions should be observed. Before performing any maintenance or inspections beneath the machine, ensure it is parked on firm, level ground with the attachment lowered, the control lock lever engaged, and the key removed [1]. Securely block the tracks to prevent any movement [1]. If working under a raised machine or equipment, always use wood blocks, jack-stands, or other rigid supports [1]. Never rely solely on hydraulic cylinders for support [1].

When accessing maintenance areas, be aware of access doors and covers. When closing engine hoods, operate the push-button release by hand only, and ensure hands are removed before the hood fully closes to avoid injury 2, 3, 4, 5, 6, 7, 8, 9, 10. Avoid adding pressure to the engine hood when it is open 2, 3, 4, 5, 6, 7, 8, 9, 10.

Regular inspections are crucial. Machines should undergo yearly inspections by qualified inspectors and monthly self-inspections 11, 17, 18. Keep records of all inspections for at least three years [2]. Before starting any inspection or maintenance, carefully read and understand the relevant procedures, use appropriate tools, and wear proper personal protective equipment [2]. Confirm job procedures to prevent accidents [2].

To prevent unauthorized use during maintenance, attach a "DO NOT OPERATE" tag [2]. Ensure the work site is clean and organized to avoid injuries [2]. Be cautious of rotating parts and ensure all guards are in place [3]. If the machine needs to run during maintenance, have an operator at the controls with a clear means of communication between the operator and maintenance personnel 11, 16.

Always operate machinery in well-ventilated areas to avoid carbon monoxide exposure [3]. When connecting, disconnecting, or storing attachments, follow all instructions and secure them to prevent falls [3].

At the end of each shift, park the machine on a level surface, lower the attachment, engage the control lock lever, secure windows, remove the key, and refill the fuel tank 19, 20. Clean and inspect the machine thoroughly, addressing any issues before the next use 19, 20.