John Deere 420 Crawler, Changing Transmission Oil

[@leifwilson7053]

That is not the drain plug. It holds the detent ball for the PTO lever. The drain is a pipe plug like the fill plug.

[@gotwoodinhead6814]

Well tarnation! That would explain why I didn't get much oil out.

[@Pocketfarmer1]

3 indispensable books for these old gals: operator’s manual, shop manual and parts manual. Deere did some strange “recycling of chapters from “M”s and 40s . and a lot of the stuff for sale has tractor info the does not apply (ie front tire bearings), but for wrenching get the books. Nice machine . Mines a phase one 420, a beefed up 40.