Manual variable displacement axial piston pump, which is characterized by the body and body composition variables; body from the pump casing (12), drive shaft (1), the cylinder (15), a plurality of pistons (11), the shoe (10 ), return plate (9), the return spring (13), the sleeve (20), one-way thrust ball bearings (18), a small spring (14), ball joints (8), thimble (22), retainer holes (19), with the oil pan (16) and pump body (17) composition; shaft (1) and the cylinder (15) between the splined coupling, a plurality of plungers (11) respectively mounted in the cylinder (15) plunger hole on the plunger (11) of the ball and the shoe (10) associated piston pump v38, slipper (10) cards in return plate (9) on the hole, return plate (9 ) central hole and a ball joint (8) cooperates, the thimble (22) mounted in the cylinder (15) on the thimble hole, the return spring (13) and bushing sleeve small spring (14) after the (20 ) mounted on the drive shaft (1) and the cylinder (15) between the pump body (17) and the casing (12) between the screw associated with the oil pan (16) mounted in the cylinder (15) and pump ( between 17); hole retainer (19) mounted on the cylinder (15) near the end of the oil pan (16); variable by variable housing body (2), the variable head (3), a small dial block ( 4), dial column (5), variable valve (6) and a large dial blocks (7), with the top screwed in the variable housing (2) variable valve (6), variable head (3) with variable housing (2) Room by bush (23) linked to a small dial blocks (4) mounted on the dial column (5) mounted on the rear in the variable valve (6), the lower dial column (5) is inserted in the large dial blocks (7 hole) on the big dial block (4) with screws in the variable head (3), between the main body and the variables associated with the screw pump spot variable transmission shaft end (1) through a bearing mounted on the pump ( variable pump, and the other end through 17) mounted on the bearing housing variable 2) (one-way thrust ball bearings (18) mounted between the pump (bearings and bushings 17) (20). Pump itself can be "positive and negative", it depends on the direction of the swash plate two swings for the job outside of the casing of the pump control module must have variable traction swash plate. As long as the amount of external control some adjustment. Easily complete the swash adjust the angle made such a variable displacement pump is inevitable. motors (or other power source) forward and reverse rotation piston variable pump, oil pump drive bi-directional rotation, complete back into the oil. Because of their own high-power motor is rotating inertia large, can not be quickly brake, reverse, so this approach is only suitable for small power motors (such as large valve opening and closing mechanism), or commutation infrequent system (such as opening and closing mechanism grabs the port). Variable pump debugging variable pump, hydraulic preferred by Jinan Jing Jing Chong Chong Hydraulic Machinery Limited. Jinan Jing Chong Hydraulic Machinery Co., Ltd. (www.jnjcyy.com) (www.jnjcyy.com) strong, credible, in Jinan, Shandong mining machinery industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement to create innovative ideas will lead crystal hydraulic and you hand into the brilliant, for a better future!