03-29-2013, 06:37 AM
DaveH, Yes, most of today's "run of the mill" cylinders will handle the pressures of today's "run of the mill" pump pressures. My old Allis-Chalmers tractors however, were equipped with cam operated piston pumps of low volume high pressure (some above 3,000 psi).
The cylinders were single acting and actually were rams, in that they had no piston, per se. They worked on the displacement principal. The rods (rams) were pretty close to the ID of the cylinders (they look really skinny) and were just displaced outward by the fluid under high pressure. Allis only had to seal the ram end of the cylinder, no piston seals to wear out and leak.
The cylinders were single acting and actually were rams, in that they had no piston, per se. They worked on the displacement principal. The rods (rams) were pretty close to the ID of the cylinders (they look really skinny) and were just displaced outward by the fluid under high pressure. Allis only had to seal the ram end of the cylinder, no piston seals to wear out and leak.
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