Hello anonymous "Hogowner"! Your question is answered on page 10 of the Service Manual.
Jacking: Ercoupes No. 813 and up may be jacked with a steel bar about 3/4 inch in diameter inserted through the hollow main landing gear knee joint pin. Place jack under bar, and raise. (Note from personal experience: don't use a thin walled pipe instead as that may bend enough to slip.) Ed Burkhead http://edburkhead.com/Ercoupe/index.htm ed -at- edbur???khead.XXX change -at- to @, remove ??? and change XXX to com
