Yanmar 4LH Series Marine Diesel Engine Service Manual
Complete service manual for Yanmar 4LH Series marine diesel engines, covering 4LH-TE, 4LH-HTE, 4LH-DTE, and 4LH-STE models. Includes detailed procedures, diagrams, and specifications. Ref: AOA 1030-1
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Sample pages from the Yanmar 4LH Series Marine Diesel Engine Service Manual manual
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Models Covered & Key Technical Specifications
Reference-Grade Service Manual: Yanmar 4LH Series Marine Diesel Engine Yanmar 4LH Series (4LH-TE, 4LH-HTE, 4LH-DTE, 4LH-STE) (AOA 1030-1) -- 2000s Analytical Resource & Documentation | Compendium.
- Maximum Output Data: 192g/HP/hr represents the peak fuel consumption rate under load conditions.
- Specific Thermal Envelope: For optimal performance, 20°C defines the ambient operating temperature.
- Universal Dimension Specs: The overall width dimension for the 4LH-STE is 726 mm, signifying the standard installation requirements.
- Published Lubrication Specs: The engine requires 4.5 L of engine oil for proper lubrication and cooling.
- System Maintenance Schedule: Every 50 hours of operation, remove the drain cock and sediment bowl for routine upkeep.
- Fundamental Power Rating: 140 HP (103.0 kW) is the maximum output for the 4LH-HTE model at 3200 rpm.
Professional Workshop Service Manual & Technical Specifications
Reference-Grade Service Manual: Yanmar 4LH Series Marine Diesel Engine
Yanmar 4LH Series (4LH-TE, 4LH-HTE, 4LH-DTE, 4LH-STE) (AOA 1030-1)
| Component | Baseline | Calibration-Spec |
|---|---|---|
| Engine Model | 4LH-TE | 4LH-HTE |
| Max. Output | 170HP/3300rpm | 191HP/3300rpm |
| Fuel Oil Temp. | 65°C | 65°C |
| Intake Air Filter | 1.94 m² | 3.162 m² |
Service procedures are grouped by chapter, covering General Information, Basic Engine, Fuel Injection Equipment, Intake and Exhaust System, and more. This manual provides essential information for the maintenance and repair of Yanmar 4LH series marine diesel engines.
Verification procedures are included for ensuring correct installation and basic maintenance.
Repair information is provided for all major engine components and systems.
The document includes coverage of fuel system diagnostics and troubleshooting.
Brake system specifications are included for performance analysis.
Safety procedures are documented for general operation and maintenance.
This manual documents torque specifications for critical engine components to ensure proper assembly and pressure slip prevention.
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