Hi The first thing you could do is ask Steve when it's apart L.O.L.
From my point of view there will be things you might see before it gets to measuring it that will decide the crank regrind anyway. when I pull an oil pan and bearing caps the first things I look for if it's knocking or got low oil pressure are,
Is there any copper backing material showing where the white metal on some types of bearing could be worn from the bearing inserts, the crank should be measured for wear then.
is there any ridge where some bearing types wear the crank either side of the oil grooves leaving a high narrow band in the middle on what should be an otherwise flat surface across each journal.
Are there any bad scratches or gouges/ white metal stuck to the crank shaft where the bearing got hot/ maybe pounded out and run rod metal to crank metal or welded stuff to the crank messing up what should be a mirror polished surface. the odd time a guy might get lucky and white metal polishes off and the cranks ok.
I've never done a Zetor motor but there are some engines you can't "roll" the rear main bearings in anyway as you can't get the cap off without splitting the tractor to undo bolts in the bell housing behind the flywheel. That might also decide whats coming apart from your findings with that to. anyhow thats what I got to say from general experience looking before getting real technical with a micrometer. Good luck with what you find in there.
Upload one or more videos to your post. Photo filesizes should be less than 300K and Videos, less than 2MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - The Ferguson System Principal An implement cutting through the soil at a certain depth say eight inches requires a certain force or draft to pull it. Obviously that draft will increase if the implement runs deeper than eight inches, and decrease if it runs shallower. Why not use that draft fact to control the depth of work automatically? The draft forces are
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
