Caterpillar crankshaft damage to threads and bolts

Caterpillar crankshaft damage to threads and bolts

We’re supporting a client who is overhauling 4 Caterpillar 3512 generator sets at the moment, and we got the email below from them this morning… There is a translation error in that this is an issue with the crankshaft and not camshaft, but this is where the beauty of photographs can help! Our advice was to helicoil the damaged threads (which is a recognised process by the OEM), though there are certain considerations in carrying...

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Cummins KTA50 emergency generator performance and parts supply

Cummins KTA50 emergency generator performance and parts supply

An offshore client contacted us last week as they were experiencing issues with their Cummins KTA50 emergency generator performance. Once the engine was up to running speed and the running light illuminated, the engine kept accelerating. Shortly after this, the vent flaps tripped and the engine rapidly slowed down to below idle before stopping completely – all within 30 seconds. After a few conversations to gain all the information surrounding...

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Iveco 8281SRI25 – black smoke

Iveco 8281SRI25 – black smoke

While Cris – our engineer – was visiting a client’s site last week he was asked to look at an Iveco 8281SRI25 engine. The engine was started, and straight away, thick plumes of black smoke were emitted. The client explained that this was normal on startup, but after 5 minutes of running, there was no change to the colour of the smoke. Talking to the client, they were unaware of the significance of the smoke colour, and that...

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Is the case affecting your Woodward PSG governor performance?

Is the case affecting your Woodward PSG governor performance?

Our engineer Andy has just finished resolving a fuel control problem, and I figured I’d share it with you as it might help if you have a similar issue. The problem was caused by a Woodward PSG governor fitted on a cruise vessel’s Daihatsu 6DL-20 generator engine. The operator had tested the governor on board but found that when it reached the right temperature, the oil pressure was dropping. Once the governor had arrived in our...

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Cylinder head oil starvation

Cylinder head oil starvation

We’ve currently got some cylinder heads in our workshop for overhauling. It’s not unusual for us to to be doing this type of work, but these particular heads have highlighted a problem which can affect most engines.And the results can be catastrophic.It was during the inspection of the rocker gear that we found some of the oilways on the rocker posts were blocked with carbon deposits: If the rocker posts had not been removed and...

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Caterpillar starter motor seized

Caterpillar starter motor seized

When carrying out maintenance we all know how vital it is to keep track of parts and tools used. But it’s not just tools we need to keep track of. An offshore client sent us two Caterpillar air starter motors to overhaul; one had seized and the other was not operating correctly on demand. Our engineer Mark set to work on these, starting with inspection and then stripping them down – at this point, the cause of the motor seizing...

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