I picked up a Rears 200 gallon pull tank this season. My former orchardist lost a pump on one of his last year even though he had put antifreeze in it, obviously did something wrong. My Rears manual said to pump antifreeze through the pump, however as I was doing that I looked at how the pump was hooked up. Four bolts hold the plate it is mounted on to the frame. The inlet and outlet are threaded for easy removal. So I decided to insure I wouldn't have a problem, I removed the pump. All the hoses drained out and my pump is now in my basement kitchen. Next season all I have to do is mount the plate back to the frame, which I marked, hook the agitator belt on the pulley, attach the hoses and I'll be good to go.
Just for good measure I pulled out my manual from Rears, sadly it isn't as well produced as their sprayers. The procedure on winterising is near the back of the manual. Pages aren't numbered, but it is on the page that has 'PUMP MAINTENANCE' at the top with the 'AR' symbol of the pump manufacturer. Categories are 'Every 200 hours and at season's end', 'Replacing air dome diaphragm', 'Winter Storage', and 'Replacing suction diaphragm'. If this page is missing, let me know and we'll figure out a way to get you a copy from mine.
Washington Okanogan Valley
Zone 6b