Resurrecting an older thread.
While researching a control valve problem, I came across this thread. It's probably a little late for the OP, but I thought I'd offer up the pdf file I have of the L1700 Owner's Manual. Click the link to download and/or save. (The file is 8.6 MB, so it may take a minute to download.)
http://ajk.rockdalenet.com/Kubota/1700_loader_Owners_Manual.pdf
Maintenance of the FEL begins on page 8, and includes control valve, cylinder, and gear pump disassembly and reassembly along with exploded views and (old*) part numbers.
* This pdf was scanned from a manual that was printed in 1977/78. Some, if not all, of the part numbers have changed. So far, most of the part sources I use have been able to cross reference.