Posted by Jim.ME on June 03, 2022 at 17:37:44 from (67.242.176.154):
In Reply to: 401C posted by limitless on June 03, 2022 at 11:14:58:
Quoting Removed, click Modern View to see
You may want to consider sending your injection pump to one of the fellows that post on this site (Dieseltech or Al "the pumpman" Baker). One mistake can cost you way more than you save, and they are equipped to properly test and calibrate it. If you decide to do it yourself you need to get the proper manual for the pump, if you don't have it, before starting.
As for the serial number 305275, I would say it is 1978-1979 vintage. Lists of the industrial serial numbers aren't published like the Ag tractors. Someone may have an industrial, construction, forestry serial number book and give the exact year, otherwise you will need to have your JD construction equipment dealer get it for you. The parts catalog uses serial number, not the year, to designate part changes during the production run.
You should get the John Deere Operator's and Technical (service) Manuals for it as well. You can get a printed copy of the parts catalog or you can use the online one and print off the pages you need. Here is a link to the 401C Parts Catalog;
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