How much TSC oil did you add, and what is the capacity of the system?
Cheap oil is not worth it. Go get a good oil from AGCO, MF, JD, Kubota Case IH or New Holland. Doesn"t matter who, whatever"s cheapest. (provided were talking about straight, regular Trans-Hydraulic Fluid). The TSC stuff is maybe $3/gallon cheaper. That"s $12 vs $15-$16/gal. Your 5303 likely holds about 10 gallons. $120 vs $150-160. I can buy AGCO 821XL for 69.95/5 gal HERE, in Canada. That"s 13.99/gal. Certainly shouldn"t be anymore there.