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Anonymous Poster #1

Main Engine Mak M601 C Camshaft Cam Slipping Problem

10/02/2012 3:58 AM

Dear friends,

On one of my ships we are facing a problem of cam lobes of fuel pump cam shifting/slipping. These are shrink fit on the cam shaft and twice we had the problem of these shifting.

I would like to know if anyone has had a similar problem before and what is the main reason for this occuring in these type of engines.

the engine make is MAK 6 M 601 c type in line 4 stroke engine.

Thanks
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Joshi
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Join Date: Oct 2007
Location: India
Posts: 1246
Good Answers: 34
#1

Re: main engine mak M601 C camshaft cam slipping problem.

10/02/2012 5:02 AM

How old is the ship & the engine?
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ozzb
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Join Date: Mar 2007
Location: Rosedale, Maryland USA
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Good Answers: 266
#2

Re: main engine mak M601 C camshaft cam slipping problem.

10/02/2012 7:11 AM

Has anyone spec out the parts? Tolerances on this type fit is very close. Also the technical manual read it. The fit may have required a cylindrical sealant to hold.

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Joshi
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Join Date: Oct 2007
Location: India
Posts: 1246
Good Answers: 34
#3

Re: Main Engine Mak M601 C Camshaft Cam Slipping Problem

10/02/2012 9:06 AM

That is some resource for you:

THE LEARNING RESOURCE FOR MARINE ENGINEERS

www.marinediesels.co.uk

Take care. Good luck.
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durtieduck
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Join Date: Jan 2011
Posts: 668
Good Answers: 3
#4

Re: Main Engine Mak M601 C Camshaft Cam Slipping Problem

10/03/2012 4:22 PM

the pump lobe might be getting hot enough to expand faster than the cam shaft. knurling will increase the diameter of cam shaft. make the knurling deep enough to give you the proper press fit again.

i think they make a knurling tool that can be used at the job site. if not, you will have to take the cam shaft to the shop. that's probably the best approach anyway. the tolerances are only a few thousands.
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anil.dhanawade
Participant

Join Date: Oct 2012
Posts: 1
#5

Re: Main Engine Mak M601 C Camshaft Cam Slipping Problem

10/06/2012 5:48 AM

Dear friends,

We have replaced the cam for one of our affected unit with a split cam .

Thanks
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anil.dhanawade (1); durtieduck (1); Joshi (2); ozzb (1)

Previous in Forum: 8 psi Main Line Pressure Sometimes Dropping to 3 to 4 psi   Next in Forum: Water Flow Through Fixed Diameter Nozzle

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