Don't lube the gear rack. Here's a video that may interest you though:
http://www.doityourselfrv.com/how-to-lubricate-the-schwintek-in-wall-slide-out-system-mechanism/#
When we bought our RV with the Schwintek slides, Greg, the guy that does the PDI and walk through with us, showed us the control boxes and how to reset. He said the best thing to do is download and print out the troubleshooting guide and a few other articles that pertain to the slides, then put them with our owners manuals. He said printing them out is better than relying on an internet connection if we were to need to work on them.