EX120-5 EX130-5 ZX120 4BG1T 8-97100-388-0 Isuzu 4BG1 Complete Diesel Engine Assembly Compatible with Isuzu Hitachi JCB
1. Product Overview & Wholesale Price Range
The Isuzu 4BG1 / 4BG1T Complete Diesel Engine Assembly (OEM Part # 8-97100-388-0 / 110001810 / 4BG1 / 4BG1T) is a 4-cylinder 4.3-liter turbocharged direct-injection diesel motor engineered for 12-to-14-ton excavators operating under continuous excavation, trenching, and earthmoving jobs.
- Factory Wholesale Price: $3,800 – $6,500 USD (Direct manufacturer pricing — Save up to 50% vs regional dealer markups)
- MOQ & Bulk Discount: 1 Unit (Tiered wholesale discounts available for batch container orders)
- Lead Time: 1–3 business days (Large factory stock ready for immediate worldwide dispatch)
- Warranty: 12 Months full replacement warranty with 100% dynamometer load testing video proof
2. Application Worksite Checklist (施工场景清单)
Engineered for sustained torque output and fuel efficiency under harsh continuous field operations:
- Urban Pipe Trenching & Utility Work: Steady idle stability and low vibration during municipal pipe laying with Hitachi EX120-5 excavators.
- Highway Infrastructure & Earthmoving: High lugging torque for rapid bucket digging cycles on Hitachi ZX120 and JCB JS130 excavators.
- Agricultural Drainage & Land Clearing: Heavy-duty cooling circulation prevents engine overheating in hot outdoor tropical environments.
- Demolition & Foundation Digging: Forged crankshaft and reinforced block casting withstand severe impulse shock loads.
3. Diesel Engine Troubleshooting & Diagnostic Guide (发动机常见故障排查)
If your 12–14 ton excavator is exhibiting engine power loss or mechanical breakdown, consult the diagnostic guide below:
- Fault 1: Black Exhaust Smoke Under Heavy Digging Load & Power Drop (重载剧烈黑烟/整车无力)
Root Cause: Worn mechanical fuel injection pump plungers, clogged nozzle tips, or turbocharger boost pressure leakage.
Solution: Inspect turbocharger boost and replace with a pre-tested complete Isuzu 4BG1T engine assembly (OEM 8-97100-388-0). - Fault 2: Milky Engine Oil & Coolant-Oil Emulsification in Radiator (机油发白乳化/水箱串油)
Root Cause: Corroded cylinder liner D-rings, cracked cylinder head casting, or ruptured oil cooler element.
Solution: Replace damaged oil cooler core / cylinder liner O-rings or swap with a complete drop-in engine unit. - Fault 3: Abnormal Metallic Knocking Noise From Engine Block (引擎敲缸异响)
Root Cause: Excessive oil clearance on connecting rod bearings or piston pin gudgeon bushing wear.
Solution: Replace connecting rod bearings or install a pre-tested complete 4BG1 engine assembly. - Fault 4: Heavy Blow-By Gas & White Oil Smoke Blowing From Filler Cap (机油盖剧烈冒烟吹气)
Root Cause: Broken piston rings, severe cylinder wall scuffing, or stuck compression ring grooves.
Solution: Perform a complete engine overhaul or install a new complete power assembly. - Fault 5: Engine High Coolant Temperature Overheating Under Operation (高温开锅/水温过高)
Root Cause: Clogged water pump impeller, stuck thermostat, or cracked cylinder head gasket blowing gas into cooling system.
Solution: Check coolant circulation pump and replace head gasket or replace complete power unit.
4. Hot Machinery Replacement Parts Recommendation (5大品类热门推荐表)
Explore our factory-direct replacement components compatible with major global excavator brands:
| Category (品类) | Machine Model (适用型号) | OEM Part Number (零件号) | Compatibility (适配品牌) |
|---|---|---|---|
| Diesel Engine Assembly | EX120-5 / ZX120 | 8-97100-388-0 / 4BG1T | Compatible with Isuzu Hitachi |
| Diesel Engine Assembly | PC400-7 / PC450-7 | 6251-11-1001 / SAA6D125E-3 | Compatible with Komatsu |
| Hydraulic Main Pump | EX120-5 / EX130-5 | 4372038 / HPV091DS | Compatible with Hitachi |
| Hydraulic Main Pump | SK200-6 / SK210-6 | YN10V00003F1 / K3V112DTP | Compatible with Kobelco |
| Hydraulic Main Pump | CAT 320C / 320D | 200-3269 / SBS120 | Compatible with Cater*pillar |
| Slewing Motor Assembly | SK120-5 / SH120 | YN15V00001F1 / MSG-85P | Compatible with Kobelco Sumitomo |
| Main Control Valve | EC210B / EC240B | 14524181 / 14531613 | Compatible with Vol*vo |
5. Frequently Asked Questions & Technical Support (QA 问答专区)
Q1: How do I verify if this Isuzu 4BG1 / 4BG1T engine assembly fits my Hitachi EX120-5 excavator?
A: Check your original engine nameplate for OEM part number 8-97100-388-0, 110001810, or 4BG1T stamp. You can also send us photos of your engine flywheel housing and oil pan for instant fitment verification.
Q2: My EX120-5 excavator emits heavy black smoke and lacks power when digging. Will replacing this engine solve it?
A: Yes, heavy black smoke under load indicates severe fuel pump, turbocharger, and cylinder compression wear. Installing our complete pre-tested Isuzu 4BG1T engine restores 100% factory power.
Q3: Is this Isuzu 4BG1 / 4BG1T engine assembly dyno tested before shipment?
A: Yes, every single engine assembly undergoes a 2-hour dynamometer load bench test verifying oil pressure, coolant temperature, boost pressure, and horsepower curve. A live test video is provided before shipping.
