AP2D

Main advantages and scope of application of Uchida AP2D series hydraulic pumps

The Uchida AP2D series of hydraulic pumps (manufactured by Uchida, part of Bosch Rexroth) have gained popularity, especially as main pumps for mini excavators. Their main advantages are their well-thought-out design and reliability.

The main advantages of Uchida AP2D series hydraulic pumps:

1. Compact twin design (Tandem Pump):

   The most important feature of the AP2D pumps is that they are two axial piston pumps in one housing, driven by a single drive shaft. This provides several significant advantages:

   • Space saving: Instead of two separate pumps, one compact unit is used, which is critical for small machines such as mini excavators.
   • Multi-circuit power: Allows simultaneous and independent powering of different hydraulic circuits (e.g. one pump for the chassis, another for the work equipment), ensuring smooth and fast simultaneous operations.
2. High efficiency and energy saving:

   AP2D pumps are equipped with a Constant Power Control system. This system automatically adjusts the pump flow and pressure to optimally utilize the machine's engine power.

   • Engine protection: Prevents engine overload by preventing its speed from dropping.
   • Fuel economy: Thanks to the efficient use of engine power, fuel consumption is reduced.
3. Durability and reliability:

   Uchida pumps are known for their robust construction and long service life when properly maintained.

   • Quality materials: The use of high-quality components ensures wear resistance.
   • Widespread repair base: Due to the widespread use of these pumps, a large number of quality spare parts (OEM and analogues) are available on the market, which simplifies and reduces the cost of repairs.
4. Versatility and wide application:

   AP2D series pumps are installed on a huge number of mini excavators and other compact equipment from leading global manufacturers, such as:

   • Caterpillar
   • Volvo
   • JCB
   • Kobelco
   • Case
   • New Holland
   • Yanmar and others.

   This versatility confirms their proven and reliable design, which has become the industry standard for machines in the 3-6 tonne class.

5. Possibility of expanding functionality
   • The pump design allows for the installation of an additional, smaller capacity pump (usually a gear type) on the rear cover. This third pump can be used to supply auxiliary circuits such as the control line (pilot line) or low pressure hydraulic circuits, making the hydraulic system even more flexible.

Uchida AP2D series hydraulic pumps consist of major components, each of which plays an important role in its operation. The main components of this pump include:

• Cylinder block Rotor
• Drive Shaft
• Bush
• Bearing Ring
• Snap Ring
• Gear pump
• Needle Bearing
• Sliding Bearing
• Roller Bearing
• Cylinder block press Pin
• Pin of Swash plate
• Retainer Plate
• Shoe plate
• Swash plate (Cam rocker)
• Piston shoe
• Control Piston
• Spring of Rotor
• Seal kit pump
• Ball Spring Holder
• Valve plate Right
• Valve plate
• Washer
• Swash plate Ball

We also provide repair services for Uchida motors and pumps, guaranteeing the quality of the work performed. We are ready to provide a high level of service to our customers.

You can always contact Aspect Plus specialists for help in selecting the necessary spare parts for your hydraulic motor, get advice and additional information regarding technical units and other components.

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