This is a common problem for tractors where it has been many years since they were split between the center section and the rear frame. there is an O-ring seal between those two housings to connect the suction side of the MCV pump. As the o-rings ages it becomes less effective at sealing between the two housings. Since the seal is above the oil level air enters on the suction side of the pump. When you start the tractor this air is drawn into the MCV pump which is not very good at pumping air.
The short term solution is to add about five to seven gallons of oil above the full mark on the stick. That puts the oil level above the seal so air will no longer enter the MCV pump. The only downside is that when you change hydraulic filters you will also drain out some of this extra oil.
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Today's Featured Article - History of the Cockshutt Tractor - by Danny Bowes (Dsl). The son of a very successful Toronto and Brantford, Ontario merchant, and himself quite an entreprenuer, James G. Cockshutt opened a business called the Brantford Plow Works in 1877. In 1882, the business was incorporated to become the Cockshutt Plow Company. Along with quality built equipment, expedious demand and expansion made Cockshutt Plow Works the leader in the tillage tools sector of the farm equipment industry by the 1920's.
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