Hose Failure Causes and Inspection Checklist

Common failure modes include cover abrasion, cracking, kinking, leakage at the connection, leakage at the hose-to-fitting interface and fitting separation. These observations help organise an investigation, but they do not prove a single cause. Preserve the failed sample and record its location before changing the installation.

A failure near the coupling may warrant checks of routing, mechanical load and assembly preparation. Wear against a bracket points toward contact, while heat exposure and fluid incompatibility are separate possibilities. Review the operating history and related components instead of replacing the hose repeatedly with the same unexamined specification.

Park and secure the machine, support attachments as required, isolate power and release stored pressure according to the equipment procedure. Account for accumulators and suspended loads. Inspection and removal belong to personnel trained for the system.

Never search for a pressurised leak with your hand. Suspected hydraulic fluid injection is an emergency requiring immediate medical attention. Do not work on a leaking assembly while it remains energised, even when the leak looks small or the machine has stopped moving.

• Identification: record machine, circuit, assembly reference, installation date and operating hours where known.
• Cover: look for cuts, rubbing, cracks, blisters, flattening and exposed reinforcement.
• Connections: check leakage evidence, corrosion, damaged nuts, cracked metal and movement at the hose-to-fitting interface.
• Route: check contact points, tight bends, twisting and sections that may become taut during normal machine movement.
• Supports: inspect clamps, guards and sleeves for displacement, damage and trapped debris.
• Surroundings: note nearby heat sources, chemical contamination and changes made during other maintenance.
• History: compare the findings with previous failures on the same circuit.

Record photographs and the action taken against each finding. A checked box without a location or description is difficult to use at the next service. Where access is restricted, document the uninspected area and plan a safe opportunity to examine it.

Follow the equipment manufacturer's inspection schedule first. There is no single interval suitable for every mining truck, excavator or loader. The maintenance plan should account for exposure, movement, failure consequence and experience on the particular fleet.

As a site planning approach, incorporate accessible visual observations into pre-start checks, with a more detailed isolated inspection at planned services. Increase attention after attachment changes, abnormal operation or a reported contact point. This is a suggested workflow, not a replacement for the machine's required schedule or a promise that damage will always be visible.

Assign responsibility for reviewing inspection records. If several assemblies develop the same wear pattern, bring the review forward and investigate routing or duty. Waiting for the next calendar date can leave a known problem unresolved.

Leakage, exposed reinforcement, fitting displacement, cracking or significant hose deformation require the affected assembly to be removed from service and assessed under the maintenance procedure. Do not hide damage under a sleeve or attempt a patch. Determine the replacement requirement and address the cause before returning the machine to work.

For repeated failures, compare pressure behaviour, temperature, route and assembly selection with the accepted requirements. Ask for specialist review where the cause remains uncertain. A larger pressure rating is not a universal answer to mechanical contact or an unsuitable fluid.

Keep the new installation reference and inspection outcome with the machine history. This supports planned spares, helps procurement distinguish urgent replacement from a recurring problem, and gives the workshop useful evidence for the next maintenance decision.