Description
HPK055 9192497 Hydraulic Pump Assembly Overview
The HPK055 9192497 Hydraulic Pump assembly manufactured by Tatan is a heavy-duty tandem variable displacement axial piston unit belonging to our Hydraulic Pump Assembly classification. Engineered specifically for Hitachi ZX120, ZX120-1, ZX120-E, and ZX130 12-ton crawler 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 4BG1T diesel engine and routing pressure flow through the main control valve assembly, this hydraulic pump combines dual variable piston pumps (2 × 55 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 HPK055 9192497 Hydraulic Pump
| Product Category | Hydraulic Pump Assembly | Warranty | 1 Year / 12 Months |
| Specific Valve Model | Hitachi HPK055 / HPK055AT Tandem Piston Pump | Brand Name | Tatan |
| Compatible Equipment | Hitachi ZX120 | ZX120-1 | ZX120-E | ZX130 | OEM Part Number | 9192497 / 9227923 / 9197338 |
| Matched Engine Series | Isuzu 4BG1T Turbo Diesel Engine (66 – 72 kW) | Place of Origin | Guangdong, China |
| Max Operating Pressure | 34.3 MPa (343 bar / 4975 PSI Continuous) | Peak Overload Pressure | 36.3 MPa (363 bar / 5265 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 |
Comprehensive Hydraulic Pump & Component 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 crawler 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 12-ton excavator distribution system with our HPK055 9192497 Hydraulic Pump, workshop technicians and fleet managers achieve direct machine uptime:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Hitachi ZX120 Pump Replacement | 1:1 direct bolt-on installation eliminates tracking pull and restores full digging power on boom and arm cylinders. |
| Heavy Equipment Repair Workshops | Avoids the complex labor of internal lapping; saves mechanic hours with pre-tested, factory-calibrated dual flow balance. |
| Quarry & Civil Earthmoving Fleets | Maintains stable 34.3 MPa operating pressures during continuous auxiliary breaker hammering and deep trenching. |
| Equipment Parts Stockists | High-demand 12-ton hydraulic pump inventory packaged in solid export wooden crates ready for immediate global dispatch. |
HPK055 9192497 Hydraulic Pump Diagnostic & Troubleshooting Guide
Use this technical guide to diagnose common hydraulic pump symptoms on Hitachi ZX120 series crawler excavators:
| Hydraulic Fault Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Boom hoisting slows down accompanied by engine bogging | Dual variable regulator power-control spool sticking failing to destroke pump displacement as pressure exceeds 28 MPa. | Replace with Tatan 9192497 complete pump assembly with factory-calibrated regulators matched to Isuzu 4BG1T 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.
HPK055 9192497 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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