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CA engine rebuild-machine work?
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J&J View Drop Down
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Joined: 24 Apr 2021
Location: IN
Points: 26 		Post Options Post Options   Thanks (0) Thanks(0)   Quote J&J Quote  Post ReplyReply Direct Link To This Post Topic: CA engine rebuild-machine work?
    Posted: 16 hours 54 minutes ago at 9:03pm
couple questions:

If the block needs to be decked, do I have to take material off the new sleeves as well?

I checked the crankshaft end play with a feeler gage at .041. Is this overly excessive or is this typical wear for an engine that needs an over haul? Will the new thrust bearing take care of it?

Should there be this much of a gap between the crank gear and the journal in the pic?
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 22312 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 16 hours 46 minutes ago at 9:11pm
You typically do NOT deck those old wet-sleeve blocks. Use a good sealer around every water passage hole in the head gasket and re-torque head bolts (cold) after a couple hrs of run time. What you must do when decking is re-cut the sleeve counter bores. Too expensive for my wallet.
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Joined: 12 Jun 2017
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Points: 1090 		Post Options Post Options   Thanks (0) Thanks(0)   Quote im4racin Quote  Post ReplyReply Direct Link To This Post Posted: 7 hours 1 minutes ago at 6:56am
A good machine shop will cut the counter bore the same amount when decking. The gear is to be tight against the journal.
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steve(ill) View Drop Down
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Joined: 11 Sep 2009
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Points: 89220 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 5 hours 3 minutes ago at 8:54am
.040 end shake is not abnormal when taking apart a WORN ENGINE....end shake should be more like .003 - .005 inch... You put in the new bearings and see what you get.. If you have to reduce the clearance, you can pull the gear back off and machine a step on the end so it pushes on a few thousandths more.

Edited by steve(ill) - 4 hours 60 minutes ago at 8:57am
Like them all, but love the "B"s.
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Points: 26 		Post Options Post Options   Thanks (0) Thanks(0)   Quote J&J Quote  Post ReplyReply Direct Link To This Post Posted: 4 hours 32 minutes ago at 9:25am
So the space between the gear and the journal should not be there and mine has walked out. Is it just a matter of the machine shop pressing the gear back against the journal to bring it back to the proper end play?
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Points: 26 		Post Options Post Options   Thanks (0) Thanks(0)   Quote J&J Quote  Post ReplyReply Direct Link To This Post Posted: 3 hours 33 minutes ago at 10:24am
I should add- the space between the gear and the journal is .060
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Points: 26 		Post Options Post Options   Thanks (0) Thanks(0)   Quote J&J Quote  Post ReplyReply Direct Link To This Post Posted: 2 hours 45 minutes ago at 11:12am
I guess another question is if the gear is pressed all the way to the journal does it even act as a thrust surface or not?
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steve(ill) View Drop Down
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Points: 89220 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 30 minutes ago at 1:27pm
yes, that is the THRUST surface.... originally the gear was pressed on flush against the journal.. That was suppose to give you "about" the right backlash.... Now the tractor is 70 years old and who knows what is worn in that area.. Like i said, push the gear on all the way and see how it fits on the journal.. If too tight, pull the gear and put a shim behind it.. normally they will be too LOOSED, and you pull the gear and  under cut a step on the back of the gear so it will move inward .020 - .040 or the required amount... to get a few thous backlash.

Edited by steve(ill) - 28 minutes ago at 1:29pm
Like them all, but love the "B"s.
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