Sorry to say, but the Titan QC 2nd is one of the worst 2nds ever built from AQ.
I'm more than happy that they have it finally taken out of their program.
The proven Titan Classic 2nd o.t.h. is for me quite the best unbalanced 2nd ever built, especially as Fleet Reg.
Could not believe that AQ was able to construct such a cheap crap, and also with their own hose conectors to avoid customers to buy generic hoses.
If you have the manual of the Titan Classic and just some experience in servicing it should be no problem to overhaul the Titan QC.
To get the not necessary manual one would have to do an online course for 40,-US$ which I doubt ever someone did (or maybe yes?!).
My advice, get rid of it if possible, you will not have a lot of fun with it......
If in need of the schematics, pm me......