Yanmar 6HAL2 Series Service Manual — All Variants PDF Download

Description

What’s in This Manual

This is the Yanmar 6HAL2 series Service Manual (document code 0B6HA-JA0011), a 238-page technical workshop document covering disassembly, assembly, inspection, maintenance standards, and torque specifications for the complete 6HAL2 engine family. Published by Yanmar Power Technology Co., Ltd., it is intended for land-based emergency and marine auxiliary engine applications. The manual focuses on maintenance standards and essential disassembly and assembly procedures, making it the primary workshop reference for technicians servicing any variant in this series.

Models This Manual Applies To

This manual covers all eleven variants of the Yanmar 6HAL2 series:

• 6HAL2 — land-based, pour-water-to-cool
• 6HAL2-N — marine auxiliary, water cooling
• 6HAL2-T — turbocharged, land-based
• 6HAL2-TN — turbocharged, marine auxiliary, water cooling
• 6HAL2-HT — high-output turbocharged, land-based
• 6HAL2-HTN — high-output turbocharged, marine auxiliary, water cooling
• 6HAL2-DT — dual-turbocharged, land-based
• 6HAL2-DTN — dual-turbocharged, marine auxiliary, water cooling
• 6HAL2-WT — turbocharged, radiator cooling (YAP spec)
• 6HAL2-WHT — high-output turbocharged, radiator cooling (YAP spec)
• 6HAL2-WDT — dual-turbocharged, radiator cooling (YAP spec)

All variants share the same 6-cylinder, 130 × 165 mm bore × stroke, 13.14-litre direct-injection architecture with firing order 1-4-2-6-3-5-1.

Main Systems & Chapters Included

• Safety precautions, warning label placement, and visual symbols
• Engine exterior views and cross-sectional diagrams
• General specifications and technical overview (Section 2.3) — complete model performance tables
• Fuel oil, lubricating oil, and coolant management specifications
• Disassembly and assembly tools list (Section 3.1)
• Decomposition guidelines and assembly instructions
• Post-disassembly and post-assembly inspection checks
• Cylinder head — inspection and maintenance (Section 4.1)
• Piston and piston pin (Section 4.2)
• Connecting rod (Section 4.3)
• Cylinder liner (Section 4.4)
• Crankshaft and main metals (Section 4.5)
• Camshaft and tappets (Section 4.6)
• Timing gear (Section 4.7)
• Cylinder block (Section 4.8)
• Lubrication system (Section 4.9)
• Cooling water system (Section 4.10)
• Fuel oil system (Section 4.11)
• Supercharger / turbocharger (Section 4.12)
• Air cooler (Section 4.13)
• Electrical components (Section 4.14)
• Starting air starter — special order (Section 4.15)
• Electric speed control device — special order (Section 4.16)
• Vibration isolation device — special order (Section 5)
• Check drive (Section 6)
• Periodic inspection checklists — operating, emergency, and marine engines (Section 7)
• Maintenance standards table (Section 8)
• Torque table for major bolts and nuts (Section 9) — cylinder head bolts, connecting rod nuts, general torques, pipe fitting torques
• Pipeline diagrams for marine variants — 6HAL2-N, 6HAL2-TN/WT, and 6HAL2-HTN/DTN/WHT/WDT (Section 10)
• List of scope of application and adjustment criteria (Section 11)

What This Manual Enables

• Full engine disassembly and reassembly using the documented procedure and tool list
• Clearance and tolerance measurements for cylinder head, pistons, connecting rods, cylinder liners, crankshaft, and main bearings
• Lubrication system inspection including pump discharge values and oil cooler area specifications
• Cooling system maintenance for fresh water, seawater, and radiator-cooled variants
• Fuel injection system servicing — injection pump, feed pump, plunger, and injection pressure settings (23.5 ± 0.5 MPa)
• Supercharger and turbocharger inspection procedures (T51, TF08L, TD08H, TV58, Garrett T51 units)
• Electrical component inspection and alarm device checks
• Tightening torques for all critical fasteners including cylinder head bolt procedure and connecting rod nut method
• Periodic inspection scheduling using model-specific checklists for operating, emergency, and marine duty cycles

Why This Manual Is Worth Having

The 6HAL2 series spans a wide power band — from 90 kW at 1,200 rpm (6HAL2-N) up to 353 kW at 1,800 rpm (6HAL2-DT) — and is deployed in demanding marine auxiliary and land-based emergency power roles where reliable servicing data is essential. This manual provides the maintenance standard dimensions, torque values, lubrication specifications (SAE #30/#40 marine, 10W-30 land), and system-specific procedures needed to carry out a proper overhaul without guesswork. The inclusion of pipeline diagrams for all marine variants and separate periodic inspection checklists for operating, emergency, and marine engine duty cycles makes it the single most complete servicing reference for this engine family.

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