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Message: <blockquote data-quote="Tazza" data-source="post: 8586" data-attributes="member: 82">Well if he has bought Bobcat hydraulic oil it will be rite. These systems run engine grade oil not hydraulic fluid. 10W30 to say 20W50 is ideal. The Bobcat oil is still the same grade as engine oil but it has Bobcats sticker on it. Hydraulic oil is too thin to keep the parts lubricated when the machine gets warm.You are correct in replacing the hoses if they are cracked. Even though its the outer thats cracked it can cause leaks. Just get a hydraulic shop to make the hoses, they are cheaper than buying genuine hoses.The filter should be cheap, but if it was dirty you would see that! mine had bieces of all sorts stuck in it. A quick clean and it was running perfect!If its going to get a bit of use, i really do advise that you check your axle seals. At the very least i'd change the chain case oil (this will also take engine oil).Any other questions just let me know, i know my 743 in and out</blockquote>