Torsional Coupler Replacement

[amgrant1979]

Hi Guys,

Ive been finding pieces of brown Rubber on my Gearboxes, started on the Port but now both Have it and I feel like the port is starting to shift noisily.

I would like to see if I can find out what Torsional Coupler I have so I can order replacements.

Engine 6BTA 370 with approx 1700hrs
Gear box Twin Disc 5050A Port serial number 5HA080 STBD 5HA079

I have space to move the gearbox back about 8 inches but it looks like the pipe for the turbo is in the way is it possible to rotate this out of the way?

Thanks in advance

Regards

Andrew

Topic

[amgrant1979]

Thanks Tony blunt as always but I’m sure you get sick of people doing what I did and asking instead of looking sorry!

Your advice is spot on as always and I removed the coupler and stage 1 is failing, the local dealer has the parts and will rebuild the couplers!

Thanks again for your advice saved me $$$ and learnt something in the process

[Tony Athens]

Learn this web site…….It’s all there. In this case, also learn how to use a wrench as I doubt a torque wrench is usable in the space you will have to work in..

Metric Bolt Torque Specifications

[amgrant1979]

Ohh also what torque should I use for the coupler and also the bell housing bolts?

Regards

Andrew

[amgrant1979]

Thanks Tony, I’ve contacted the local supplier in Hong Kong with regard to both options, I’ll wait and see if they get back to me or I may have to reach out to the USA dealer but they may not ship here with there being a dealer here already. Typical problem we have in HK is that the dealers are useless hopefully that’s not the case with Centa

Regards

Andrew

[Tony Athens]

You have a Twin Disc MG5061 with a Centa CF-DS torsional coupling.. It has failed (see it quite often) ………………………………. Look that the pics..

Two solutions–Buy a new one from a Twin Disc distributor, or send it to Centa ( if still possible) for rebuilding.. Years back, that was the cheapest solution.

Google up “Centa CF-DS couplings”

Tony

[amgrant1979]

So when I pulled the gearbox back I found a chunk chunk of rubber. I can’t seem to see where that has come from. Please see more photo’s attached. You can also see Matt the little bits that have been expelled out the vent holes that made me start wondering about the torsional coupler.

Regards

Andrew

[amgrant1979]

Ok finally got out to the boat, please see photo’s attached, I will post a second batch of pics.

Thanks in advance for your help Tony!

Regards

Andrew

[amgrant1979]

Was hoping that wasn’t going to be the case, it will be a couple of weeks before I get back to the boat, traveling in Canada and the USA was hoping to be able to get the coupler whilst state side. I’ll post photos when I get back and pull it apart.

Regards

Andrew

[Tony Athens]

Until you pull the gear off the engine and take good pics of what you have and what is going on, there is nothing anyone can help you with.. You have to go thru some pain first.

Tony

[amgrant1979]

Thanks for that, I suspected that was the case. Hopefully Tony chimes in here, otherwise I will email him directly.

Regards

Andrew

[Rob Schepis]

Yes, remove the air tube going from the turbo air scroll to the aftercooler and then squeeze the clip and rotate the scroll. Let Tony recommend the best torsional coupler for that setup – if he does not pop in here send an email to [email protected]

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amgrant1979

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