Doosan DH35 Main Hydraulic Pump Assembly – AP2D18 (OEM 2401-9287 / 401-00021)

Primary hydraulic pressure on the 3.5-ton Doosan DH35 and Daewoo Solar 035 mini excavator is generated by a variable displacement axial piston pump driven by the Isuzu 3LD1 diesel engine. Tatan Machinery supplies 100% Brand New AP2D18 tandem hydraulic main pump assemblies (OEM part numbers: 2401-9287 / 2401-9287A, interchangeable with 401-00021 / 401-00454). Pre-assembled with dual variable swashplate rotating groups and an integrated auxiliary pilot gear pump, every unit is factory bench-tested under full 24.5 MPa working pressure. Backed by our 12-Month Comprehensive Replacement Warranty.

Step 1: Confirm Pump Identification & Wholesaler Standard

Tatan Machinery is a verified first-party physical stocking wholesaler of excavator components. All our hydraulic pumps, main valves, and travel drives are 100% Brand New (our diesel engine assemblies are remanufactured to OEM tolerances).

Step 2: Verify Machine Fitment & Hydraulic Coupling

The AP2D18 pump platform serves several Doosan/Daewoo 3-ton to 4-ton mini excavator series. Review your chassis setup below:

Step 3: Inspect Actual Product Build & Rotating Groups

This main pump is 100% Brand New with zero operating hours. We do NOT sell resealed salvage yard pumps. Key internal components include:

• Precision Bi-Metallic Valve Plates & Cylinder Barrels: Micro-lapped rotating mating surfaces designed to eliminate internal pressure bypass under high operating temperatures (>55°C).
• Forged Piston Shoes & Swashplate Cradles: High-tensile forged steel pistons with swaged bronze slipper shoes tested against high-frequency hydraulic hammer backpressure pulses.
• Integrated High-Pressure Pilot Gear Pump: Provides steady 3.9 MPa pilot control pressure to the 2436-1002 main control valve, ensuring responsive joystick actuation.

Step 4: Watch Live Warehouse Inventory & Physical Stock Video

Because this is a 100% Brand New hydraulic component (only our diesel engine assemblies are remanufactured), we document our physical warehouse stockholding, palletized inventory, and port-sealing quality directly on camera:

Step 5: Review 12-Month Quality Warranty Protection

Every 100% Brand New 2401-9287 hydraulic pump supplied by Tatan Machinery comes backed by our 12-Month Comprehensive Replacement Guarantee:

• Full Major Mechanical Coverage: Casting fractures, internal cylinder barrel cracks, piston slipper shoe separation, and drive shaft shear resulting from manufacturing defects.
• Direct Replacement Support: If any defect occurs under proper hydraulic maintenance, we dispatch immediate replacement components or assemblies without lengthy disputes.

Step 6: Heavy Export Packaging Protocol

Precision axial piston assemblies require clinical protection against airborne moisture and rough cargo handling:

• 100% Sealed Metal/Threaded Port Plugs: Main suction inlet, high-pressure outlets, and pilot charge ports fitted with heavy-duty threaded blanking caps.
• Anti-Corrosion VCI Protective Wrap: Input spline shaft and unpainted mounting flanges coated with rust-inhibiting grease and vacuum-sealed in VCI protective foil.
• Custom Molded Foam / Structural Timber Base: The pump is securely positioned in shock-absorbing contoured cushioning within the crate.
• ISPM 15 Fumigation-Free Solid Plywood Box: Sealed export crate banded with heavy galvanized steel straps.

Actual sealed port caps, protective anti-corrosion wax, and reinforced wooden crating

Step 7: Supported Global Logistics & Customs Documentation

Prompt logistics dispatch adapted for urgent machine-down emergencies and trade stock:

• Air Express (3–7 Days Door-to-Door): Handled via DHL Express, FedEx, or air cargo for rapid jobsite recovery.
• Sea Freight Consolidation: Economical LCL shipping for distributors stocking multiple units.
• Tariff-Ready Paperwork: Commercial invoice detailing official HS Code (8413.60 – Hydraulic Pumps), packing lists, and Certificate of Origin (COO) upon request.

Daily overseas air express dispatches and consolidated container freight

Step 8: Check Associated Doosan DH35 Powertrain & Hydraulic Units:

(Note: While our diesel engines are professionally remanufactured, all our hydraulic pumps, main valves, and travel drives are 100% Brand New).

• DIESEL ENGINE:
  Doosan DH35 Isuzu 3LD1 Diesel Engine Assembly
  Remanufactured
• CONTROL VALVE:
  Main Control Valve Assembly (2436-1002) for Doosan DH35
  100% Brand New
• SWING MOTOR:
  Hydraulic Swing Motor Assembly for Doosan DH35
  100% Brand New
• FINAL DRIVE:
  Final Drive Travel Motor Assembly for Doosan DH35
  100% Brand New
• BRAND CATALOG:
  View All Doosan Excavator & Heavy Equipment Parts Collection

Step 9: Contact Gavin for Direct Wholesale Pricing & Delivery Options

Looking for verified direct supply pricing, air/sea freight calculation, or serial tag confirmation for Doosan DH35 hydraulic main pumps? Contact senior specialist Gavin now!

💡 Fast Quote: Send your machine serial number or old pump nameplate photos for an accurate match within 10 minutes!