Yanmar JH4 Series Marine Engine Service Manual - 2007
Shop manual for Yanmar JH4 series marine engines, covering diagnostics, removal sequences, and maintenance procedures for engine systems and components. P/N: 0BJH4-G00102.
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Models Covered & Key Technical Specifications
Yanmar JH4 Series (3JH4E, 4JH4AE, 4JH4-TE, 4JH4-HTE) Service Manual - 2007
This manual covers the following Yanmar JH4 series marine engines:
- 3JH4E
- 4JH4AE
- 4JH4-TE
- 4JH4-HTE
Engine Specifications and Maintenance Guide | Genuine Yanmar Marine Engine Manual.
- General Information: Includes key engine specifications for all JH4 series models, detailing bore, stroke, displacement, and compression ratios across different configurations.
- Test and Adjustment Specifications: Outlines procedures for cylinder compression tests, specifying acceptable pressure ranges for each model variant.
- Repair Specifications: Details critical dimensions and tolerances for engine components like cylinder heads, valves, pistons, and crankshafts to ensure proper assembly and function.
- Special Torque Chart: Provides essential torque values for critical fasteners, ensuring correct tightening during assembly and maintenance procedures.
- Measuring Instruments: Lists the specialized tools required for accurate measurement and inspection of engine components during repair and maintenance.
- Disassembly Procedures: Offers step-by-step instructions for dismantling the engine, including detailed figures and notes for each major component removal.
Professional Workshop Service Manual & Technical Specifications
Yanmar JH4 Series Workshop Service Manual: 3JH4E, 4JH4AE, 4JH4-TE, 4JH4-HTE Marine Engines - Diagnostics & Repair
Asset-ID: JH4-Service-Manual // Serial-Range: All Models // Procedure-Type: Repair & Maintenance Procedures
| Specification | System-Path | Validation-Data |
|---|---|---|
| Engine Model | Specifications | Various Models |
| Disassembly | Step-by-step Procedures | Detailed Figures |
| Inspection | Component Checklists | Measurement Limits |
| Maintenance Schedule | Interval-Based Tasks | OEM Guidelines |
| Torque Specifications | Fastener Tightening Values | Critical Assembly |
| Special Service Tools | Required Measurement Instruments | Repair Precision |
The manual presents information on the engine structure, specifications, and maintenance procedures for the Yanmar JH4 series. It details the disassembly, inspection, and reassembly of the 3JH4 and 4JH4 Series engines, providing critical data for service professionals.
Key Systems Documented: This manual covers engine systems including the fuel system, cooling system, lubrication system, and electrical system, offering specific maintenance and repair guidance for each.
Repair and Component Procedures: Detailed procedures are provided for component inspection, including cylinder block, cylinder head, pistons, crankshaft, camshaft, and valves, ensuring all parts meet specified limits.
This documentation provides comprehensive coverage for Yanmar JH4 series marine engines, facilitating effective diagnostics, maintenance, and repair operations.
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