In article , John B. wrote:

My father-in-law just recently gave me an old Sears Craftsman Planer that he
's had and used for a number of years, and he purchased it used. I believe
the planer was made in the mid to late sixties, but I know the model number
is 113.20621 When he gave it to me, he told me that he didn't have the
owners manual for it.
snip

There is a manual for a later model he
http://www.owwm.com/MfgIndex/detail.asp?ID=222

It may be of some help.

--
http:sawdustmaking.com