i have a 204 Nortac with a Front end loader, when its cold out it wont move at all , have to start the tractor up and run it for about 10 min. or so befor it will move , but then it works fine , i drained the oil out ant put new AW 32 in it, i think thats what it was from Napa , still when its cold it wont move. is there anything i can ajust on it , if you remumber , i had to have a new pump and valve put on it when the tractor was new ,