Description
AP2D36 4472052 Hydraulic Pump Assembly Overview
The AP2D36 4472052 Hydraulic Pump assembly manufactured by Tatan is a high-capacity tandem variable displacement axial piston unit belonging to our Hydraulic Pump Assembly classification. Engineered specifically for Hitachi ZX70, ZX70-HHE, and ZX75US 7-ton midi excavators, replacing your worn pump with a Tatan complete assembly eliminates compound motion deceleration, restores digging breakout power, and cures internal thermal bypass across demanding utility trenching and civil construction projects.
Driven directly by the Isuzu 4JG1 diesel engine and routing pressure flow through the main control valve assembly, this hydraulic pump combines dual variable piston pumps (2 × 36 cm³/rev) with an integrated auxiliary pilot gear pump, ensuring 100% direct bolt-on installation with flywheel drive couplings and chassis hydraulic hard lines.
Key Attributes & Technical Parameters for AP2D36 4472052 Hydraulic Pump
| Product Category | Hydraulic Pump Assembly | Warranty | 1 Year / 12 Months |
| Specific Valve Model | Uchida Rexroth AP2D36 Tandem Piston Pump | Brand Name | Tatan |
| Compatible Equipment | Hitachi ZX70 | ZX70-HHE | ZX75US | ZX75UR | OEM Part Number | 4472052 / 4437197 / 4469025 |
| Matched Engine Series | Isuzu 4JG1 / Yanmar 4TNV98 Diesel (40.5 – 42.4 kW) | Place of Origin | Guangdong, China |
| Max Operating Pressure | 26.0 MPa (260 bar / 3770 PSI Continuous) | Peak Overload Pressure | 31.4 MPa (314 bar / 4554 PSI Peak) |
| Spool Precision Spec | Micro-Lapped Bimetal Plate < 0.003 mm | Quality Status | 100% Brand New Assembly with Regulators |
| Machinery Test Report | Provided (100% Bench Flow Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Hydraulic Fluid Spec | ISO VG 46 Anti-Wear Hydraulic Oil | Packaging | Export Wooden Box Packaging |
Heavy Equipment Hydraulic Drive & Main Pump Inventory
Tatan maintains extensive factory inventory of complete tandem piston pumps, regulators, pilot gear pumps, cylinder block rebuild kits, and bimetal valve plates across global machinery lines:
Supported Excavator Machinery Brands & Global Coverage
In addition to Hitachi midi excavators, Tatan manufactures and supplies replacement hydraulic main pumps, regulators, and rotating barrel groups across global equipment brands:
Application Scenarios & Buyer Value
When upgrading or replacing your 7-ton excavator distribution system with our AP2D36 4472052 Hydraulic Pump, workshop technicians and fleet managers achieve direct machine uptime:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Hitachi ZX70 Pump Replacement | 1:1 direct bolt-on installation eliminates tracking pull and restores full digging power on boom and arm cylinders. |
| Compact Machinery Repair Workshops | Avoids the complex labor of internal lapping; saves mechanic hours with pre-tested, factory-calibrated dual flow balance. |
| Civil Drainage & Earthmoving Fleets | Maintains stable 26.0 MPa operating pressures during continuous auxiliary auger drilling and rock-breaking hammer tasks. |
| Equipment Parts Stockists | High-demand 7-ton hydraulic pump inventory packaged in solid export wooden crates ready for immediate global dispatch. |
AP2D36 4472052 Hydraulic Pump Diagnostic & Troubleshooting Guide
Use this technical guide to diagnose common hydraulic pump symptoms on Hitachi ZX70 series midi excavators:
| Hydraulic Fault Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Boom hoisting slows down accompanied by engine bogging | NFC negative flow control regulator spool contamination failing to destroke pump displacement as pressure exceeds 22 MPa. | Replace with Tatan 4472052 complete pump assembly with factory-calibrated regulators matched to Isuzu 4JG1 engine output. |
| 2. Single track pulls to one side during simultaneous blading | P1 or P2 rotary group volumetric loss or swashplate servo piston seal degradation causing uneven flow output. | Install Tatan new tandem pump with precision-matched dual rotating barrel groups; flush contaminated oil lines. |
| 3. Fine bronze glitter & copper dust in return filter element | Piston slipper pads worn thin or separated from swashplate thrust plate due to contaminated hydraulic fluid. | Stop machine immediately to prevent control valve contamination; install fresh complete pump and clean suction strainers. |
| 4. Digging breakout fades rapidly once oil reaches 75°C | Excessive clearance between cylinder barrel face and bimetal valve plate allowing high-pressure fluid to bypass into casing. | Install Tatan new hydraulic pump with micro-lapped bimetal valve plates (< 0.003 mm tolerance) and new suction O-rings. |
Transport Packaging & Certified Quality Assurance
Precision tandem hydraulic pumps require absolute shock protection. Every Tatan unit is sealed and packaged in solid export timber crates:
✈️ Express Air Courier
Partnered with DHL, FedEx, and UPS for 3-7 day priority delivery worldwide.
🚢 Sea Cargo Freight
LCL and FCL container ocean freight for bulk equipment parts replenishment.
📦 Export Wooden Crates
Solid fumigated timber cases lined with thick shockproof foam to prevent transit damage.
AP2D36 4472052 Hydraulic Pump FAQ & Related Categories
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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