I just got a used 82 Kubota B7001 and it didn't come with a manual I would like to change the oil on the motor and the transmission so dose ain't body know what type of oil I should use for both ?? and I also notice that I'm getting white smoke coming out the muffler every time I start the tractor and also when I accelerate the engine with the petal ..what would be the process of illumination ..??? thank you in advance johnny