Description
4BG1T 8972520330 Diesel Engine Assembly Overview
The 4BG1T 8972520330 Engine assembly manufactured by Tatan is a heavy-duty 4.329-liter inline 4-cylinder turbocharged water-cooled industrial diesel powerplant belonging to our Diesel Engine Assembly classification. Engineered specifically for Hitachi ZX120, ZX120-1, ZX120-3, and ZX120-5G 12-ton crawler excavators, replacing your worn or failed engine core with a Tatan complete turnkey assembly stops crankcase oil blow-by, restores 72 kW (97 HP) rated output at 2150 RPM, and cures hot-idle oil pressure loss under continuous hydraulic pump load.
Coupled directly to the machine’s main hydraulic pump and governing the main control valve assembly, this complete diesel engine incorporates an induction-hardened forged steel crankshaft, a direct-injection crossflow cylinder head, an internal gear oil pump, a wastegated turbocharger, and an in-line mechanical Zexel A-type fuel injection pump, ensuring 100% direct bolt-on installation with flywheel housings and chassis mounts.
Key Attributes & Technical Parameters for 4BG1T 8972520330 Engine
| Product Category | Diesel Engine Assembly | Warranty | 1 Year / 12 Months |
| Specific Valve Model | Isuzu 4BG1T / 4BG1-TAB Turbo Diesel Engine | Brand Name | Tatan |
| Compatible Equipment | Hitachi ZX120 | ZX120-1 | ZX120-3 | ZX120-5G | OEM Part Number | 8972520330 / 8-97252033-0 / 4437300 |
| Matched Engine Series | Isuzu 4BG1 Series (4-Cylinder Turbo) | Place of Origin | Guangdong, China |
| Max Relief Pressure | 66 kW – 72 kW @ 2150 RPM Rated | Pilot Control Pressure | 4.329 Liters (105mm × 125mm) |
| Spool Precision Spec | Chromed Dry Liners < 0.003 mm Tolerance | Quality Status | 100% Brand New Turnkey Assembly |
| Machinery Test Report | Provided (100% Dyno Bench Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Hydraulic Fluid Spec | 15W-40 Heavy-Duty Diesel Engine Oil | Packaging | Export Wooden Box Packaging |
Multi-Machinery Fleet Support & Engine Assembly Inventory
Tatan supplies factory-built turnkey diesel engines, cooling packages, water pumps, and internal overhaul rebuild parts for excavators, wheel loaders, and compact rollers globally:
Supported Excavator Machinery Brands & Global Coverage
In addition to Hitachi crawler excavators, Tatan manufactures and supplies replacement complete diesel engines, short blocks, and overhaul parts across major equipment brands:
Application Scenarios & Buyer Value
When replacing your 12-ton excavator power unit with our 4BG1T 8972520330 Engine, workshop mechanics and fleet managers secure direct operational benefits:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Hitachi ZX120 Engine Repowering | 1:1 direct bolt-on installation eliminates starting delays and restores full 72 kW power for continuous 0.52 m³ bucket rock trenching. |
| Heavy Equipment Repair Workshops | Avoids the complex labor of block re-boring and injector pump calibration; installs as a pre-timed turnkey unit. |
| Quarry & Civil Earthmoving Fleets | Heavy-duty forged pistons and multi-layer steel head gaskets withstand continuous hydraulic breaker hammer operations. |
| Machinery Parts Stockists | High-demand 4.3L 4-cylinder turbo engine inventory packaged in solid export wooden crates ready for immediate global dispatch. |
4BG1T 8972520330 Engine OEM Diagnostic & Troubleshooting Guide
Use this technical guide to troubleshoot Isuzu 4BG1T diesel engine symptoms on your Hitachi ZX120 crawler excavator:
| Engine Fault Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Severe engine lugging & black smoke under load | In-line A-type injection pump plunger wear or boost compensator diaphragm rupture failing to meter fuel against turbo boost pressure. | Replace with Tatan 8972520330 complete engine fitted with brand-new factory-timed Zexel injection pump and matched turbocharger. |
| 2. Coolant boiling & expansion tank bubbling | Combustion gas blown past cylinder head gasket on rear cylinder 4 due to thermal concentration under continuous rock hammer work. | Install Tatan new engine with factory-torqued MLS head gasket and precision surface-milled block face. |
| 3. Heavy crankcase blow-by & oil spitting | 105mm cylinder dry liner wall micro-scoring or stuck keystone compression rings allowing combustion pressure into the oil pan. | Install Tatan new 4BG1T turnkey engine; flush radiator cooling fins and install fresh dual-element air filters. |
| 4. Oil pressure lamp flickers at hot idle (< 0.12 MPa) | Excessive crankshaft main journal bearing clearance or worn oil pump rotor losing delivery volume under operating heat. | Replace complete engine assembly to maintain factory oil pressure (> 0.38 MPa rated / > 0.15 MPa idle) and prevent crankshaft seizure. |
Transport Packaging & Certified Quality Assurance
Every Tatan diesel engine undergoes internal anti-corrosion fogging, heat-sealed plastic wrap, and solid timber export crating:
✈️ 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.
4BG1T 8972520330 Engine FAQ & Related Categories
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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