Shandong Shengyue Technology Development Co.,Ltd is one of the most professional yuchai 4.40 l inline 4 125 hp engine assembly ycd4j22t-125 manufacturers and suppliers in China. Please feel free to buy high quality genuine auto parts at competitive price from our factory.
YUCHAI 4.40 L Inline 4 125 HP ENGINE ASSEMBLY YCD4J22T-125
Mechanical Base Specifications
| Specification Item | Data / Standard | Technical Definition & Maintenance Tips |
|---|---|---|
| Number of Cylinders & Layout | Inline 4 (直列 4 气缸) | Compact and heavy-duty powertrain architecture for off-road machinery. |
| Total Displacement | 4.40 L (4400 cm³) | Provides much higher low-speed torque compared to 3L-class engines of similar power. |
| Bore × Stroke | 108 mm × 120 mm | Long-stroke design, perfectly matching heavy-duty low-speed climbing required by mixers and forklifts. |
| Combustion Chamber Type | Direct Injection ω Chamber | Fuel is injected directly into the piston crown bowl, high thermal efficiency, high tolerance for off-spec diesel. |
| Compression Ratio | 17.5 : 1 | High compression ratio ensures smooth cold starts even in harsh winter environments. |
Performance & Output Specifications
| Specification Item | Data / Standard | Technical Definition & Logistics/Purchasing Tips |
|---|---|---|
| Rated Power | 91 kW / 125 HP (马力) | Metric nominal output power, rated speed is typically between 2400 rpm - 2600 rpm. |
| Maximum Torque | 400 - 450 N·m | Low peak torque speed (1600-1800 rpm), prevents stalling under sudden heavy mechanical loads. |
| Min. Fuel Consumption Rate | ≤ 210 g/kW·h | Highly economical range, effectively reducing daily operating diesel costs for fleet management. |
| Nominal Emission Stage | National II / Tier 2 / Euro 2 | Golden model for export. Simple mechanical layout with no complex aftertreatment (SCR/DPF), lowering overseas maintenance costs. |
Aspiration & Fuel System Specifications
| Specification Item | Data / Standard | Technical Definition & Maintenance Tips |
|---|---|---|
| Aspiration Mode | Turbocharged (涡轮增压) | Equipped with an efficient turbocharger to boost power output in high-altitude or low-oxygen environments. |
| Fuel Injection Pump | Traditional Inline Mechanical Pump | Non-common rail (no ECU). Fully relies on mechanical plungers, offering excellent tolerance to various fuel qualities. |
| Fuel Injector Type | Multi-Hole Long Nozzle Assy | Mechanically opened (cracking pressure approx. 22-24 MPa). Can be cleaned or replaced individually via test bench. |
| Cooling Method | Water-Cooled / Forced Airflow | Equipped with a high-flow suction-type plastic fan, optimized directly for compact and hot engine compartments. |
Logistics & Physics Specifications
| Specification Item | Data / Standard | Technical Definition & Container/Pallet Calculation Tips |
|---|---|---|
| Engine Net Weight | Approx. 430 kg (±10 kg) | Dry weight of the bare metal engine block, excluding engine oil and coolant. |
| Export Wooden Crate Gross Weight | Approx. 485 kg | Includes steel-strapped fumigation-free wooden box, anti-corrosion bubble wrap, and sealed plastic skin. |
| Bare Engine Dimensions (L×W×H) | 920mm × 650mm × 820mm | Physical envelope dimensions without external silencer and large-volume air filter equipped. |
| Shipping Cargo Volume | 1050mm × 780mm × 980mm | Approximately 0.80 CBM per unit after crating, used for standard LCL/ocean freight volume calculations. |
| Flywheel Housing Interface | Standard SAE 3# or SAE 4# | International standard mechanical interface, directly compatible with torque converters or hydraulic double pump groups. |
Maintenance & Fluid Specifications
| Specification Item | Data / Standard | Technical Definition & Maintenance Stocking Tips |
|---|---|---|
| First Service Interval | 50 Operating Hours | Mandatory initial flush. Drain the factory oil and clean out metallic debris from the oil sump after the break-in period. |
| Regular Oil Change Interval | 250 - 500 Operating Hours | Depends on site dust conditions. It is highly recommended to replace the oil filter simultaneously. |
| Engine Oil Capacity | 11 L - 13 L | High-quality heavy-duty diesel engine oil matching 15W-40 specification (CH-4 or CF-4 grade) is recommended. |
| Cold Inlet Valve Clearance | 0.25 mm - 0.30 mm | Measured when the engine is completely cold. Excess clearance will cause aggressive mechanical "clicking" noises. |
| Cold Exhaust Valve Clearance | 0.30 mm - 0.35 mm | Exhaust valves expand more under high heat, thus requiring a slightly larger clearance to ensure tight sealing. |
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