Wheeled loader with a chafed lift hose and a spongy brake
You are starting a 12-hour shift on an 18-tonne wheeled loading shovel in an aggregate yard. The machine was washed down at the end of the previous shift and no pre-use sheet has been left. During your walk-round you find the outer cover of the main lift-ram hose is chafed through in one 40 mm section, with two wire strands visible; there is no leak yet. The steering ram has a fresh oil film but no drips. The brake pedal feels spongy and travels about 30 mm further than it did on your last shift. The yard is on a slight slope toward the stockpiles. Your supervisor says the rail wagon is waiting, the shovel is needed for 20 minutes, and the workshop cannot look at it until lunchtime.
1. Assess the three findings and decide whether the machine can be used. Justify your decision.
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Do not use the machine. The lift-ram hose has two wire strands visible over 40 mm; that is a structural failure in the pressure circuit, not cosmetic damage. A burst under load could drop the bucket or load, whip the hose and inject hydraulic oil. The spongy brake pedal, with 30 mm extra travel, is also safety-critical on a sloped yard and with a loaded shovel. The steering-ram oil film is a developing leak and needs investigation, but the first two findings already make the machine unfit. Park on level ground, lower the bucket, apply the park brake, neutralise and isolate controls, and fit a 'DO NOT USE' tag. Tell the supervisor immediately and move the machine only if a competent maintenance decision and safe recovery method allow it. Do not accept the 20-minute compromise.
2. What reporting and communication actions do you take before the end of the shift, and what makes the record useful?
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Make the report factual and usable: machine ID, hour-meter reading, date and time, location, component, exact finding and measurement, photographs if permitted, any oil level or leak rate, and the fact that the machine was tagged out. Record the supervisor's instruction and your refusal, but keep it objective. Tell the workshop, the next operator and the site manager. Use the site defect-reporting system, not only a verbal message, and keep a copy or note the reference. Explain why the record matters: it prevents the machine being returned to service, supports maintenance planning and gives an audit trail if the defect later causes an incident. Before the end of shift, check that the tag is still in place and that the defect has been booked in. If the machine is needed urgently, ask for a replacement or a safe alternative, not a workaround.