10-Year Major Inspections for Mobile Cranes Under AS 2550.5

AS 2550.5, the part of the AS 2550 series dealing specifically with mobile cranes, establishes when a major inspection is required based on the crane's age and accumulated duty. For many mobile cranes this brings a significant major inspection at around ten years from manufacture, and further inspections at defined intervals thereafter. The exact trigger depends on the crane's classification and the loads it has carried, so the ten-year figure is a strong guide rather than an absolute.

Because mobile cranes travel between sites and perform highly variable duties, their fatigue history can differ dramatically from one machine to the next. Two identical cranes bought together can reach the major inspection point in very different condition. That is why owners should treat the standard's intervals as the point at which the crane's real condition is formally assessed, not simply a date to tick off.

A ten-year major inspection is a thorough engineering examination of the crane's structure and critical systems. Inspectors focus heavily on the boom, jib, chassis, outrigger structure, slew ring, hooks and load path, along with the hydraulic and control systems that keep the crane safe under load. Non-destructive testing is used extensively on fatigue-critical welds and connections where visible inspection cannot confirm integrity.

The work often requires partial disassembly so that inspectors can reach concealed areas. Boom sections may be extended and examined, covers removed and components lifted out. This is deliberately more invasive than an annual inspection because the objective is to confirm the crane can safely continue in service for a further defined period rather than simply that it is working today.

• Boom, jib and lattice structure examination
• Chassis and outrigger structural assessment
• Slew ring and bolt condition checks
• Hydraulic system and load-holding integrity
• Non-destructive testing of critical welds and pins
• Load testing to confirm safe working performance

The single biggest mistake owners make is underestimating the downtime. A ten-year major inspection is not a same-day job; depending on the crane and any defects found, it can take the machine out of service for a meaningful stretch. Building this into your operational calendar, and ideally scheduling it during a quieter period, protects your revenue and your client commitments.

Costs vary with the crane's size, condition and the extent of any rectification. A well-maintained crane with a clean history usually moves through the inspection efficiently, while a neglected machine can uncover corrosion, cracking or worn components that must be addressed before recertification. The best protection is a consistent maintenance and periodic inspection regime in the years leading up to the ten-year point.

Recertification delays almost always come from defects discovered late. Fatigue cracking in boom welds, corrosion in the chassis, worn slew ring bolts and degraded wire ropes are all common findings on cranes reaching ten years. Each may require parts, engineering sign-off or specialist repair, and sourcing components for older models can add weeks if it is left until the inspection reveals the need.

Owners who plan ahead ask their inspector for a pre-inspection review, address obvious wear items in advance and confirm parts availability early. This front-loading of effort keeps the crane moving through the process and avoids the scenario where a machine sits idle waiting for a single component.

Once the inspection and any rectification are complete, a load test confirms the crane performs safely across its rated capacities. The inspector then issues a report assigning a new working period and documenting the standard applied, the tests performed and any conditions on continued use. This report and the load test certificate become part of the crane's permanent record.

Keeping that documentation current is essential not just for compliance but for resale value, because a buyer will pay more for a crane with a complete inspection history. A crane returned to service after a properly documented ten-year major inspection is a known, trusted asset rather than an unknown risk.

Cranes Australia specialises in ten-year major inspections for mobile cranes under AS 2550.5, coordinating experienced inspectors, non-destructive testing and load testing so you deal with one accountable team. We help you plan the downtime, anticipate likely findings and keep the crane moving through recertification with minimal disruption.

Call 0416 689 689 to book your mobile crane major inspection or to confirm when yours is due. We will assess your crane's history, scope the work clearly and give you a realistic timeline before the machine ever leaves service.