Here you go. This link will give you immediate access to a PDF of the manual which you can print for $5.95. If you want them to mail you a hard copy, it will be $12.95 including shipping.
http://www.sewconsult.com/singer/sin...anual_239.html
By the way, they have manuals for any number and brands of machines. A great resource.
Hope this helps and you should be able to get your answer as to whether the feed dogs drop and any other info you need.
Good luck and let us know how you do.