cat sixty jugs and valves

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Cat Tracks

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So I finally got the engine on the sixty torn down now I'm going to need to find a few parts. What I am wondering is can you bore the standard 6.500 jugs out to 6.75 or will the castings get to thin. What i would like to do if possible is find some worn out 6.5 inch bore jugs bore them out to fit my 6.750 inch pistons. If I can't do that I will need to find 3 good 6.750 bore jugs. I will also need to find some valves that are in good enough shape to regrind, also were do you guys find piston rings.
Thanks for all the help
Travis

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Fri, Nov 18, 2016 1:38 AM

mog5858

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i know my friend that has a sixty bored out to 6 3/4. i can ask him what he started with as he worked it hard for over 6 years with it bore out he also bumped up the compression too. when we tested it this summer it pulled 92HP on the belt.

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Fri, Nov 18, 2016 5:01 AM

Jeremy Williams

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Reply to mog5858:

i know my friend that has a sixty bored out to 6 3/4. i can ask him what he started with as he worked it hard for over 6 years with it bore out he also bumped up the compression too. when we tested it this summer it pulled 92HP on the belt.

Our family has 7 60's and all but one have been bored to 6.75". I believe it was a factory option for them. You can get rings from Otto Engine Works (pistonrings.net).

Jeremy

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Fri, Nov 18, 2016 8:20 AM

Cat Tracks

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Reply to mog5858:

i know my friend that has a sixty bored out to 6 3/4. i can ask him what he started with as he worked it hard for over 6 years with it bore out he also bumped up the compression too. when we tested it this summer it pulled 92HP on the belt.

Thanks mog5858 for the reply
I bet that 92hp sixty really bellowed
Do you happen to know will any casting # jug work to bore out to the 6.75 or is it a certain casting?

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Fri, Nov 18, 2016 8:33 AM

Jeremy Williams

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Reply to Cat Tracks:

Thanks mog5858 for the reply
I bet that 92hp sixty really bellowed
Do you happen to know will any casting # jug work to bore out to the 6.75 or is it a certain casting?

All should work. The ones we have just have less of the taper at the bottom is a fast way to tell.

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Fri, Nov 18, 2016 8:44 AM

Cat Tracks

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Reply to Cat Tracks:

Thanks mog5858 for the reply
I bet that 92hp sixty really bellowed
Do you happen to know will any casting # jug work to bore out to the 6.75 or is it a certain casting?

Thanks for the info Jeremy

I thought I had heard that you could get the 6.75 bore from the factory but I wasn't sure if it was a special casting or you just take any jug and bore it out
Thanks again for the info

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Fri, Nov 18, 2016 8:45 AM

Cat Tracks

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Reply to Cat Tracks:

Thanks for the info Jeremy

I thought I had heard that you could get the 6.75 bore from the factory but I wasn't sure if it was a special casting or you just take any jug and bore it out
Thanks again for the info

So I just took a look at my jugs they are casting 14A does a parts book show if that is originally a 6.5 inch bore?

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Fri, Nov 18, 2016 10:09 AM

rturn3060

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Reply to Cat Tracks:

So I just took a look at my jugs they are casting 14A does a parts book show if that is originally a 6.5 inch bore?

The parts books show the cyl. jugs as an assembly number 2475A which includes the head studs. Castings with 14A on them were all 6.5 inch bores. Jugs casting numbers starting 35xx are all 6.75 inch bore that were produced by cat after the 60 production stopped. If you go to the big bore pistons will also have to be located. I have used big bore as well as had 14A jugs re- sleeved standard. The wide rings used on the 60's can often be obtained from hydraulic shops at a reasonable price. Good Luck

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Sun, Nov 20, 2016 5:39 AM

Cat Tracks

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Reply to rturn3060:

The parts books show the cyl. jugs as an assembly number 2475A which includes the head studs. Castings with 14A on them were all 6.5 inch bores. Jugs casting numbers starting 35xx are all 6.75 inch bore that were produced by cat after the 60 production stopped. If you go to the big bore pistons will also have to be located. I have used big bore as well as had 14A jugs re- sleeved standard. The wide rings used on the 60's can often be obtained from hydraulic shops at a reasonable price. Good Luck

Thanks Russell and everyone else for the good info, I hadn't thought about checking with the hydraulic company's. I will check a few local hydraulic places and see what they might come up with could be cheaper than otto now I need to finish cleaning up my jugs and pistons to see what I will need for sure, so far it is looking like I will need at least one 6.75 jug or I might look for four 6.5 jugs and bore them out to fit my pistons. Thanks again for all the great info

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Sun, Nov 20, 2016 8:44 AM

chuckb

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Reply to Cat Tracks:

Thanks Russell and everyone else for the good info, I hadn't thought about checking with the hydraulic company's. I will check a few local hydraulic places and see what they might come up with could be cheaper than otto now I need to finish cleaning up my jugs and pistons to see what I will need for sure, so far it is looking like I will need at least one 6.75 jug or I might look for four 6.5 jugs and bore them out to fit my pistons. Thanks again for all the great info

OTTO is a good source for rings he has helped me several times a great CAT collector and a very nice and helpful person chuck

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Sun, Nov 20, 2016 12:06 PM

mog5858

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Reply to chuckb:

OTTO is a good source for rings he has helped me several times a great CAT collector and a very nice and helpful person chuck

well i would say yes she had a good bark to her. have a listen to for your self. he also runing JD D pistons in the 6 3/4 bore but with a little work.

https://youtu.be/UE_YMLHKK9Y

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Sun, Nov 20, 2016 10:33 PM

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