0 April.2003 YUKEN KOGYO CO.,LTD. A3H Series High-Pressure Variable Piston Pump

1 Features A3H, the ultimate design pump developed by Yuken’s own technology. It is consequently extended with wide displacement range and high pressure. Optimal control types available for industrial machines and industrial vehicles Wide displacement range with single and through drive pump High performance having maximum pressure up to 35 MPa Low noise level and high reliability based on well proved service Compact in size, greater ratio of Output power to Mass A3H, the ultimate design pump developed by Yuken’s own technology. It is consequently extended with wide displacement range and high pressure. Optimal control types available for industrial machines and industrial vehicles Wide displacement range with single and through drive pump High performance having maximum pressure up to 35 MPa Low noise level and high reliability based on well proved service Compact in size, greater ratio of Output power to Mass

2 Compact

3 Displacement

4 Specifications “01”

5 Structure “01”

6 Control Type “01”“09”“14” “01”: Pressure Compensator Type “09”: Constant Power Control Type “14”: Load Sensing Type “55”: Two Pressure & Two Flow Control Type （ High pressure set : By relief valve) “01”: Pressure Compensator Type “09”: Constant Power Control Type “14”: Load Sensing Type “55”: Two Pressure & Two Flow Control Type （ High pressure set : By relief valve) “55”

7 Control Type

8 Model Number Designation Electric Motor No. of Poles 4:4P, 6:6P Frequency of Power Source A:50Hz, B:60Hz A3H56-FR14K-10 Load Sensing A3H56-FR01KK-10 Pressure compensator Pressure adjust range K:5~35 MPa Shaft Extension K:Keyed, S:Splined Series A3H56-FR09-22B4K-10 Constant Power Control Control Power Set See Next Table Mounting F:Flange, L:Foot Direction of Rotation R:Clockwise(Normal)

9 “09” Constant Power Control Type Note) Hydraulic power (kW) changes according to shaft rotation speed. A3H56-FR09-22B4K-10 Note)

10 Dimensions A3H16~A3H180

11 Through Drive Type A3H71 with Gear Pump Splined Shaft A3H1671 tandem pump Keyed Shaft

12 Tandem Pumps

13 Constant Power Control “09” Pump swash-angle(α) changes in inverse proportion to delivery pressure(p). Under power control condition, the figure p ×α remains in constant balance between two forces acting on cam. One force is spring acting via the compensator spool, the other force is delivery pressure via the feed back piston. The operating point change is dependent on swash angle. Consequently, pump oil power (p × Q) is kept constant at constant condition of shaft speed(N) because Q=N ×function(tanα). α p Q pp spring cam control piston feedback piston compensator spool 0 M N Graphic SymbolStructure of Control Section

14 Constant Power Control “09” Input power Test condition ・ Hydraulic oil : ISO VG 32 ・ Temperature : 40 ℃ ・ Oil viscosity : 32 mm 2 /sec ・ Max. speed : 1800 r/min ・ Control power set : 75 kW Test condition ・ Hydraulic oil : ISO VG 32 ・ Temperature : 40 ℃ ・ Oil viscosity : 32 mm 2 /sec ・ Max. speed : 1800 r/min ・ Control power set : 75 kW Output flow Input power Pressure Test condition ・ Hydraulic oil : ISO VG 32 ・ Temperature : 40 ℃ ・ Oil viscosity : 32 mm 2 /sec ・ Max. speed : 1500 r/min ・ Control power set : 45 kW Test condition ・ Hydraulic oil : ISO VG 32 ・ Temperature : 40 ℃ ・ Oil viscosity : 32 mm 2 /sec ・ Max. speed : 1500 r/min ・ Control power set : 45 kW Performance Data:A3H180

15 Load Sensing “14” Graphic Symbol Load Sensing Const. Flow Control ●Variable Flow Compensator Setting:1.0~3.0MPa ●Pilot relief valve connection via remote control port (pp) Pressure Flow Shaft Speed

16 Load Sensing “14” Test condition ・ Hydraulic oil : ISO VG 32 ・ Temperature : 40 ℃ ・ Oil viscosity : 32 mm 2 /sec ・ Max. speed : 1800 r/min ・ Flow Compensator Set : 1 MPa Test condition ・ Hydraulic oil : ISO VG 32 ・ Temperature : 40 ℃ ・ Oil viscosity : 32 mm 2 /sec ・ Max. speed : 1800 r/min ・ Flow Compensator Set : 1 MPa Pressure Flow Performance Data:A3H56

17 Noise Level Characteristics 1 metre away from pump head cover Typical Data;at Max. Flow Cut Off, N= 1800 r/min

18 Noise Level Characteristics 1 metre away from pump head cover Typical Data;at Full Cut Off, N= 1800 r/min

19 Applications  Presses, Pipe bending machine  Tube forming machine  Steel works, Rolling mills  Injection molding machine, Die casting  Compactor  Industrial Vehicles  Presses, Pipe bending machine  Tube forming machine  Steel works, Rolling mills  Injection molding machine, Die casting  Compactor  Industrial Vehicles

20 Equivalent Models A10V PVPPVH PVMK3VL

21 End Cover Doc.No. ： PPD.2797 Compiled by YUKEN Product Planning Section Date of issue ： 4/03/2003 Reference Publication Pub.No. ： EL-0108 Title ： A3H Series High Pressure Variable Displacement Pumps Date of issue ： 9/25/2002 YUKEN KOGYO CO., LTD. International Business Department 1 Miyamae, Fujisawa, Kanagawa Prefecture, Japan Telephone ： Facsimile ： ： Internet ： ALA Industries Limited Southpoint Drive, Suite D Valparaiso, IN Tel: , Fax: www,yuken-usa.com