by John Wright






Weekly inspection schedules all on heavy mining gear is a vital element of the overall Mining Engineering maintenance requirements of crucial and really pricey mining machinery.


The particular focus of these inspections is always on those key high stress parts and areas of the machines having a history for stress and fatigue fractures.

Repairs and or renovation of a stressed or fractured part are always less time consuming to finish the earlier the problem is noted.

Case in point:

A 390 ton Terex RH170 excavator on-site at a coal mine goes thru is common weekly upkeep inspection and is found to have an obvious stress fracture in the imperative H-link. The machine is instantly taken off line. Each hour of down time = money lost for the mining company.

The engineering team are called out to the mine to appraise the difficulty and get on with the business of getting the machine back on line as swiftly as achievable. The five man Mining Engineering Fast Response Team have the cracked 2.4 ton H-link removed from the machine and a replacement fitted to the makers spec is 5 hours flat.

The machine is re-certified and back on line within 6 hours of the team arriving on site. But that is the simple part. The Broke 2.4ton H-Link is loaded and transported back to the workshop facility where the team do an exhaustive inspection on the fracture and confirm the best plan of action to mend and refurbish the H-link.

Backed by years of experience the mining engineering team is well versed in what should be done to fix the cast and grade steel H-link. Though this 2.4 tonne part is sizable, the team have at their disposal a substantial range of heavy lift kit and all of the required tools to get the job finished quick effectively and safely.

A firmly established and step by step process of cleaning, grinding, pre-heating and air ark gouging lays bare the splinters and prepares them for the all important cross and blend 81NI Mig welding that will not only fix the fractures but will really reinforce what are understood to be weak or potential failure areas.

Engineering a world's best practice fix on this vital piece of gear needs both the talent and focus of the mining engineer and the conformity to a highly technical process of heating, gouging, run off plates, grinding and layering of the 81NI Mig welds.

The final result is a fully redecorated H-link that's absolutely mended, cleaned, repainted, re-certified and returned to the mining company ready to be swapped out to another machine should the eventuality arise.

The 24/7 Engineering Fast Reply Team members pride themselves on providing mining engineering services that get high value mining machines back on line in the shortest amount of time, ensuring any down time and successive loss of earnings to the mine is keep to an absolute minimum.










About the Author: