AP2D28

Characteristics of the Uchida AP2D28 hydraulic pump

The Uchida AP2D28 hydraulic pump is a powerful dual (tandem) axial piston pump with variable displacement, which is the central element of the hydraulic system in midi excavators and other heavy mobile equipment. Its design combines two independent pumps in one housing, which allows you to simultaneously and without loss of performance power supply of different circuits, for example, the chassis and working equipment. Thanks to its high reliability and integrated power control system, the AP2D28 pump ensures efficient use of engine power and stable, long-term operation of the machine under high loads.

Technical characteristics of the Uchida AP2D28 hydraulic pump:

• Type: Axial piston pump, double (tandem), with variable displacement
• Design: Swash plate pump. Usually equipped with a third gear pump for the control circuits (pilot line)
• Displacement (piston part): 2 x 28 cm³/rev
• Nominal working pressure: 24.5 - 27.5 MPa (250 - 280 bar)
• Maximum pressure: up to 31.4 MPa (320 bar)
• Maximum rotation speed: ~2200 - 2400 rpm
• Performance (Flow): 2 x ~62-67 l/min
• Direction of rotation: Right (clockwise)
• Weight: Approximately 60 - 65 kg
• Application: Main hydraulic pump for 6-9 ton midi excavators

Hydraulic pump cross number: K1027212A, K9006296, 4663300, 2401-9231, 2401-9286, 400910-00091, VOE14518004, VOE14526311, VOE14528547, 31M8-10020, 31M8-10010

Hydraulic pump models: AP2D25LV1RS7

Installed in the model:

• HITACHI EX35, ZX60, ZX75U.
• HYUNDAI R55-7, R55-9 & R55-7K, R555-7K, R60-5.
• Doosan S55, DX55W, DH55, DH60-7.
• Sumitomo SH55, SH60-2, SH65.
• Airman AX35
• KOBELCO SK035
• KOMATSU PC45
• VOLVO EC55, EC60, EW55B.
• CAT E305

The company "Aspect Plus" offers a wide range of spare parts for the repair of the Uchida AP2D28 hydraulic pump.