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| Engine Model | YC4D120-21(D1204) |
| Rated Power | 120 HP (90 kW) @ 2800 rpm |
| Rated Torque | 420 N·m @ 1600-1900 rpm |
| Emission Standard | Euro II / China II |
| Application Field | Light-duty/medium-duty trucks, low-tonnage medium trucks, small construction machinery |
| Core Advantages | Low fuel consumption (≤205g/kW·h), high reliability (alloy cast cylinder block), easy maintenance (universal parts), turbocharged intercooled power system |
Power, Precision, Partnership: The Genuine Yuchai Ecosystem
Choose the authentic power legacy of Yuchai. Our 100% genuine OEM parts for the YC4D120-21(D1204) engine are designed to restore its original horsepower, torque, and efficiency, delivering the true Yuchai DNA.
Uncompromised Quality, Forged on the Original Line
Every part is produced to identical specifications under the stringent Yuchai Quality Control System (QCS), guaranteeing perfect fitment, durability, and seamless integration to preserve engine value.
Your One-Stop Solution for Assured Performance
We provide a comprehensive, one-stop supply—from components to complete kits, backed by technical support.
| No. | Part No. | Name | Qty. | Remarks |
|---|---|---|---|---|
| 1 | Q150B0620 | Bolt M6X20 | 1 | - |
| 2 | Q40106 | Washer 6 | 1 | - |
| 3 | Q40306 | Washer 6 | 1 | - |
| 4 | Q340B06 | Nut M6 | 1 | - |
| 5 | 150-1014022 | Block loop | 1 | - |
| 6 | 1530-1014021 | Gas pipe bracket | 1 | - |
| 7 | D0715-1014024A | Gas hose | 1 | - |
| 8 | Q67638 | Loop hoop 38 | 1 | - |
| No. | Part No. | Name | Qty. | Remarks |
|---|---|---|---|---|
| 1 | D0305-1009050 | Dipstick welded unit | 1 | - |
| 2 | F30SA-1028170 | Dipstick seat | 1 | - |
| 3 | Q67616 | Loop hoop | 2 | - |
| 4 | 151-1002082 | Clamp | 1 | - |
| 5 | 383-1002082 | Nylon pipe | 1 | - |
| 6 | Q150B0816 | Bolt M8X16 | 2 | - |
| 7 | Q340B08 | Nut M8 | 1 | - |
| 8 | Q40308 | Washer 8 | 2 | - |
| 9 | Q40108 | Washer 8 | 2 | - |
| 10 | D0305-1009046 | Oil dipstick teleflex bracket | 1 | - |
| No. | Part No. | Name | Qty. | Remarks |
|---|---|---|---|---|
| 1 | D07D1-1104261 | Pipe clamp bracket | 1 | - |
| 2 | Q40108 | Washer 8 | 1 | - |
| 3 | Q40308 | Washer 8 | 1 | - |
| 4 | Q150B0816 | Bolt M8×16 | 1 | - |
| 5 | A3000-1111048 | Sheath | 1 | - |
| 6 | D30-1104100B | High pressure oil pipe assembly | 1 | - |
| 7 | D0712-1104400 | Filter to injector pump pipe | 1 | - |
| 8 | 150-1104037 | Pipe clip | 1 | - |
| 9 | D0712-1104300 | Fuel pump to filter pipe | 1 | - |
| 10 | D0702-1104900 | Oil intake pipe assembly | 1 | - |
| No. | Part No. | Name | Qty. | Remarks |
|---|---|---|---|---|
| 1 | 231-1105010 | Fuel Filter | 1 | Easy Wear Part |
| 2 | Q1200830 | Bolt M8X30 | 2 | - |
| 3 | 6105Q-3509013 | Washer | 2 | Easy Wear Part |
| 4 | Q40308 | Washer 8 | 2 | Easy Wear Part |
| 5 | Q340B08 | Nut M8 | 2 | - |
| No. | Part No. | Name | Qty. | Remark |
|---|---|---|---|---|
| 1 | D30-1111070A | Advancer subassembly | 1 | Optional |
| 3 | D30-1111062A | Connecting plate gasket | 1 | Easy Wear |
| 4 | D30-1111061 | Connecting plate | 1 | - |
| 5 | D0702-1111100B | Oil injection pump parts | 1 | Hengyang |
| 6 | Q/YC149-10 | Compound seal washer 10 | 4 | Easy Wear |
| 13 | Q340B10 | Nut M10 | 4 | - |
| 17 | Q/YC149-8 | Compound seal washer 8 | 4 | Easy Wear |
