Upon rotation of cylinder block 1, pistons 2 reciprocate in axial bores of the cylinder block, being held by springs 3 against stationary swash plate 5. Thrust ball bearing 4 is mounted in swash plate 5 to reduce friction losses between pistons 2 and the plate. The fluid being pumped is delivered through crescent-shaped openings 6 and channels 7 into the hydraulic system.
$4117$EHP,RP$