Kelvin,
I do have an owner's manual and did notice the caution regarding not operating the tractor immediately after refilling with fluid. Thanks for the reminder, it could have been an expensive mistake. As to the dual ports, it really doesn't specify which one to use, so I guess I'll just alternate between the two, one gallon at a time. Also, using a pail pump makes a lot of sense, and will save time and aggravation in the long run. Thanks again.