A heavy-duty equipment technician is performing a 500-hour PM on a hydraulic excavator. The manufacturer's manual specifies a 'visual inspection of hoses and lines.' What specific indicators should the technician primarily look for to identify potential failure points?

Question: A heavy-duty equipment technician is performing a 500-hour PM on a hydraulic excavator. The manufacturer's manual specifies a 'visual inspection of hoses and lines.' What specific indicators should the technician primarily look for to identify potential failure points?

Answer options:

• Cleanliness of the hose surface and the alignment of the fittings.
• Proper torque of all hose clamps and mounting brackets. ✅ Abrasion, cracks, bulges, leaks, or signs of excessive wear on the outer cover.
• Colour consistency of the hose material and presence of manufacturer markings.

Correct answer: Abrasion, cracks, bulges, leaks, or signs of excessive wear on the outer cover.

Explanation: During a visual inspection, the primary focus for hoses and lines should be on signs of physical damage such as abrasion from rubbing, cracks in the outer cover, bulges indicating internal pressure exertion, and any evidence of leaks, all of which are precursors to hose failure.