Hey deamon, not sure i'm following the model #'s but try these link's,
http://www.wedico.de/eng/radlader.asp
http://www.wedico.de/eng/dumper.asp Some of the other member's can comment on the motor size and rpm's. The link's do mention some of the gear ratio's. Just realized they have 3 speed trannies. Hope this help's! I understand the I-Phone frustration well!
Pigeonfarmboy just finished building the loader,
http://rctruckandconstruction.com/sh...=pigeonfarmboy
Elliot build an articulated dumptruck, there was a motor discussion,
http://rctruckandconstruction.com/sh...ghlight=elliot
And Joe, Lilgiant's mention's motor's in his thread,
http://rctruckandconstruction.com/sh...ight=LilGiants Yes that's alot of reading, but great info to answer your question's
Later, Neil#2 aka doodlebug.