The engine is the heart of the excavator. It supplies the necessary power to drive the hydraulic system and other components.
As a leading excavator engine parts supplier, Tunway supplies high-quality diesel engine parts for the excavator engine rebuilding and maintaining, covering brands of Caterpillar, Komatsu, Cummins, Volvo, Isuzu, Perkins, Mitsubishi, Deutz, Kubota, Yanmar, Doosan, WeiChai, Yuchai, and others.
Our high-quality diesel engine parts not only apply to various of excavators, but also apply to construction machinery such as bulldozers, wheel loaders, backhoes, forklifts, trucks, marine, and so on.

| Cylinder Block | Cylinder Head | Crankshaft | Camshaft |
| Rock Arm | Liner | Piston | Piston Ring |
| Pin & Snap Ring | Main Bearing | Connecting Rod Bearing | Thrust Plate |
| Sleeve | Fuel Injector | Fuel Injection Pump | Connecting Rod |
| Overhaul Kit | Full Gasket Kit | Cylinder Head Gasket | Oil Pan |
| Flywheel | Muffler | Valve Inlet | Valve Exhaust |
| Valve Guide | Valve Seat | Valve Spring | Thermostat |
| Oil Pump | Water Pump | Oil Cooler | Radiator |
| After Cooler | Inter Cooler | Complete Engine | Long Block |
| Middle Block | Short Block | Nozzle | Manifold |
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467
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twspares2025-06-27 09:42:452025-06-27 09:42:458-97144-821-1 4BD1 Engine Cylinder Head for Isuzu Diesel Engine
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467
700
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twspares2025-06-26 15:21:042025-06-26 15:25:298-98208-655-0 4LE2 4HK1 4JJ1 4BG1 Cylinder Block for Isuzu Diesel Engine
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467
700
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twspares2025-06-26 13:45:412025-06-26 15:26:104JB1 Cylinder Block 8-94437397-6 Suitable for Isuzu Mechanical Diesel Engine
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467
700
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twspares2025-06-24 14:40:152025-06-25 13:58:34Yanmar Engine 4TNE94 4TNV98 and 4TNV92 4TNE92 Overhaul Parts
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467
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twspares2025-06-24 13:43:572025-06-24 13:48:13Mitsubishi 4M40 4M50 Engine Overhaul Parts for CAT 305 306 307
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467
700
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twspares2025-06-24 10:51:562025-06-24 10:51:56Isuzu 4LE2 Engine Rebuild Parts for Hitachi ZX40 ZX55 and Sany SY75
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467
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twspares2025-06-24 09:55:322025-06-24 10:09:31Komatsu 3D84 3D94 4D84 4D88 Engine Overhaul Parts for PC30 PC40 PC50
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596
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twspares2025-06-23 14:41:572025-06-23 14:41:57Yanmar Genuine New Engine Assy 3TNM68 3TNM72 3TNV74 3TNV76 3TNV80 3TNV88
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537
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twspares2025-06-23 09:04:022025-06-23 14:56:24Tunway Cummins QSB5.9 Engine Assy for Excavator Construction Machinery
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600
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twspares2025-06-16 12:31:042025-06-16 12:31:04Cummins Engine Genuine B3.9CS4 for Excavator and Construction Machinery
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602
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twspares2025-05-30 13:43:002025-06-13 03:06:24Cummins Engine Genuine 4BT3.9 for Excavator and Construction Machinery
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562
750
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twspares2025-04-13 08:23:532025-06-13 03:20:45320-0690 3200690 Fuel Injector GP for CAT C6.6 Engine 928H 938H D5R
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twspares2025-04-12 15:27:472025-06-13 03:20:37ISUZU 4HK1 4JJ1 4JG2 4JB1 6HK1 6WG1 6BG1 6BD1 Engine Assembly
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563
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twspares2025-04-12 01:57:012025-06-13 03:19:266BT5.9 6BTA5.9 6D102 Cummins Original Complete Engine Assembly
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750
750
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twspares2025-04-10 02:27:172025-06-13 03:24:08294000-2360 5344768 Fuel Injection Pump for Cummins ISBE3.9 ISBE5.9L
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750
750
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twspares2025-04-10 02:12:342025-06-13 03:24:00382-2668 3822668 384-0678 3840678 Fuel Injection Pump for C9 engine
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596
750
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twspares2025-04-10 01:18:532025-06-13 03:23:508-97602485-6 8976024856 Fuel Injector for Isuzu 4HK1 JCB JS200 JS220 ZX200
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750
750
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twspares2025-04-09 14:59:022025-06-13 03:32:058-97306044-9 8973060449 Fuel Injection Pump for Isuzu Engine 4HK1 ZX200-3
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750
750
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twspares2025-04-09 14:03:422025-06-13 03:31:55326-4634 3264634 Fuel Injection Pump for CAT321D C4.2 Engine
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750
750
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twspares2025-04-09 13:47:592025-06-13 03:31:4620R-4560 371-3974 Fuel Injector for Caterpillar C7.1 E320 E320GC