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Hello!
A couple of months ago I started watching ETCG videos on youtube. Now I want to give some experience back! hope you find my DIY report helpful!
Actually I am overhauling a 4 liter Perkins Diesel engine on a MF590. The reason why I did that, was because of very bad cold starting ability and an enormous oil consumption. I disassembled the head and the pistons, and the problem was found… the first compression ring of the 4th cylinder was broken several times and some parts of this piston ring destroyed the piston and and also the liner… very nice! this would be no big deal if there were fitted wet liners, but on this engine there are dry liners installed which have to get pressed out with a force of 30 tons!!
[url=https://lh3.googleusercontent.com/-2KYUBPDuEdc/T3lyW6BKN3I/AAAAAAAABdY/Q2Cp75I3yvk/s512/IMG_20120401_200418.jpg:x1bi228d]
[url=https://lh5.googleusercontent.com/-Yp758Y4B1Cg/T3lywobVGyI/AAAAAAAABdY/IBCk2N4i46s/s640/IMG_20120401_202111.jpg:x1bi228d]
Depp scratches in the liner!
[url=https://lh5.googleusercontent.com/-vfuApoEh4IQ/T3ltaVjGgEI/AAAAAAAABdY/ghu0N_8vAjA/s640/IMG_20120401_202324.jpg:x1bi228d]
So I started educating my self on how to remove this ruined cylinder liner. I calculated pulling forces of threaded bars and in fact, these bars could pull several tons in dependecy to the outer diameter of the bar. I have chosen thread size M27 with rating 10.9 this eaquals over 30 tons at 1500Nm = 150kg at 1m lever. This sounded feasible for me an I started constructing a tool to pull the liner:
This was the result, the small adapter for the bottom side, and the big one for the top side, and the bridge to pull against it.
bottom adaptor in place:
the first Millimeters are achived
And finally the sleeve has been pulled!!!
It was a hard work but finally every thing went fine!
and here the full video: https://www.youtube.com/watch?v=N0tpmEuCjo8I hope I could help someone in the future with this DIY report!
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I made a tool like that before for use on wet liners. Usually I will send the block out and have the machine shop do this because there is always a danger of destroying the block if you screw up.
Quoted From dollman0:
I made a tool like that before for use on wet liners. Usually I will send the block out and have the machine shop do this because there is always a danger of destroying the block if you screw up.
Yes with wet liners its easy.
Yes that was also my first thought to take the engine to a machine shop. But the prices here in Austria are so hight that it would not reckon to refurbish the block at a machine shopper. Just for an example, I took the cylinder head to a machine shop an they made me an offer of over 900
Hello back again!
the engine is running! here a small video the last 3 months in 10 minutes:
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