Thanks all for advice. No joy with hitting poppets with bolt and hammer covered with a rag. Could not get enough fluid to vent as it was difficult to hold hose steady. Cracked fittings at cylinder end of hoses with leather gloves and covered by rag. Released at most a teaspoon at the most prolific joint. Eureka! One by one we got them on. Six in all includng 3rd function. About another hour to align tractor properly and get loader back on. This was the first time I had done this changeover as it was first season using snow blower.
I am very grateful for all the great advice and help on this forum. Thanks to all!
I am very grateful for all the great advice and help on this forum. Thanks to all!