Thor Motor Coach owner's manuals are basically a grouping of the systems manuals (jacks, water heater, funace, inverter, etc). Not much else is included.
This is exactly what the DIY owner needs for most issues...however too many don't look in the book when there is an issue
Like said above, do a complete and thorough pre-delivery inspection. Check EVERYTHING and demand repairs BEFORE taking delivery. That way, you have the sales staff pushing with you for repair.
Most dealers do no repairs or fixes before sale...even things they break
Unfortunately the onus is on the buyer. The RV is driven from the factory and even a new delivery can has issues.
This is common for all brands. And is the reason to buy from a reputable and even local dealer.
P.S. Most all TMC slide drives are Schwintek style. These are different from all other type slide drives and provide unequaled space savings (no underfloor mechanicals). But, the owner MUST understand how they work or there will be problems. Because there are 2 motors (1 each end), they are power hungery...so, when moving the slide, ensure there is enough power (since the engine must be off, that's shore power or gennie running). You must press and hold the button for a full 3-5 seconds AFTER THE SLIDE STOPS to let the motors sync...listen for the tattle-tale "Whir-whirr" This does not harm the system.
We are not affiliated...we just LOVE our Thor build RV