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Seized turbocharger back on-line

Seized turbocharger back on-line

If you are reliant on “heritage” engine models, or those simply not made anymore, then chances are you will have experienced supply problems for ongoing maintenance or repairs. Sourcing of spares can usually be overcome with a bit of digging, but when it comes to major assemblies, it can be a lot more complicated, not to mention expensive! One of our clients found themselves in that position recently with two Sulzer LAG46 Turbochargers that had...

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Superseded Tooling

Superseded Tooling

You may remember that I shared some information on a couple of ABB VTC 254-13 turbos sent in for overhaul and repair, one of which was cracked. If you missed it, you can check it out here. We’ve continued work on this overhaul and we’re now completing the rebuild, during which we came across another challenge which the OEM had solved (though on a different model). One of the turbochargers required a new turbine wheel and shaft with a new...

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Incorrect compression ratio

Incorrect compression ratio

This week we are working on a Mercedes Benz 400 series engine which is used in a crane on an oil platform. The engine had been experiencing problems resulting in cracked manifolds and turbocharger housings which is why it’s in our workshop, but during our inspection of the supplied spares set, we’ve been able to prevent another problem. Originally the engine had been taken out of service by another company who had ordered a set of spares for...

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Turbocharger Damage

Turbocharger Damage

We have two ABB VTC 254-13 turbochargers being overhauled in our workshop and they both offer a stark reminder of what could be going on, unseen, in many operational turbos. I haven’t got information on the history of these turbochargers, but they’ve been sent to us as part of an engine overhaul and I thought it was worth sharing what we found: • Considerable damage to the compressor wheel blades. Some material has been removed and blades...

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Caterpillar turbo bearing collapse

Caterpillar turbo bearing collapse

As we continued with the Caterpillar 3412 engine RCA I mentioned last week, we came across more major damage caused by the oil starvation. (If you missed the previous post, click here). As described by a friend of mine, who was the Technical Manager for ABB turbochargers; “The turbocharger normally is the device that is the longest distance from the pump and is the first to feel the effects of lubrication failure.” And this is exactly what we...

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Lack of turbocharger boost on Holset 6″ turbo

Lack of turbocharger boost on Holset 6″ turbo

How many turbos have you rebuilt in your time? Even if your answer is “none”, then the chances are that as an engineer you understand the need to follow the right processes with the right parts. Because if you don’t, you could well end up in a situation like the vessel owner we are working with. They had their two Holset turbochargers overhauled by a renowned company, but after the overhaul, they were not getting the boost. Not good news, but...

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