For Ford tractors 1953 thru 1964 you could have a vane or piston style pump. The Vane pump housing is a more square style while the piston style is a round housing. For more information view Ford hydraulic pump differences.
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JR
Steiner Tractor Parts
Cody says
how about 1948 8N?
Suzette Thomas says
Cody,
The 1948 8N used neither of these pumps. It used the belly style pump.
JR