Part of the Yanmar Repair Manuals.
Before a cylinder head goes back on a Yanmar 2TD, you need the fixing nut torque and the tightening sequence, not a figure someone half-remembers at the dock. This 184-page Yanmar service manual (publication A0A1 748-8806) covers the 2TD, 3TD, and 4TD marine diesel engines end to end: cylinder block, liners, head, pistons, connecting rods, crankshaft, camshaft, and timing gears, then the full fuel system with injection pump, governor, nozzles, feed pump, and filters.
It continues through the lubrication and cooling systems, the reduction and reversing gear (with separate disassembly and reassembly procedures for the 2TD/3TD and the 4TD), the electrical system, stern equipment, and closes with troubleshooting and inspection tables.
It is a downloadable PDF with 72 bookmarks, so the torque and clearance tables are a click away whether you are at the bench, aboard, or at the parts counter.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 4-24 | External View, Specifications, Performance Curve, Engine Cross-Section, Piping Diagram, Disassembly and Reassembly Tools |
| Basic Engine | 25-65 | Cylinder Block, Cylinder Liner, Cylinder Head, Piston, Connecting Rod, Crankshaft, Camshaft, Timing Gears |
| Fuel System | 66-88 | Fuel Supply System, Injection Pump, Governor and Linkage, Fuel Injection Nozzle, Fuel Feed Pump, Fuel Filter, Water Separator, Fuel Tank (Option) |
| Intake and Exhaust System | 89-91 | Intake Port, Exhaust Pipe, Exhaust Silencer, Exhaust Manifold, Cylinder Head, Gasket Packing |
| Lubrication System | 92-104 | Oil Pump, Oil Filter, Oil Cooler |
| Cooling System | 105-115 | Water Pump, Kingston Cock, Bilge Pump, Sea Water Filter (Option) |
| Chain Overdrive Hand-Operated System | 116-118 | Sprocket Wheel, Camshaft Gear, Crankshaft Gear, Roller Chain, Starting Shaft Support |
| Reduction and Reversing Gear | 119-145 | Governor, Reversing Gear Upper Case, Reversing Gear Shaft, Clutch Housing, Reversing Gear Box, Thrust Shaft, Thrust Gear |
| Electrical System | 146-170 | Composition, Battery, Starter Morter, Alternator, Option |
| Stern Equipment | 171-173 | Stern Arrangement (Yanmar Standard), Stern Bearings |
| Troubleshooting | 174-178 | Flywheel, Engine, Fuel System, Governor, Piston, Bearings, Fuel Filter, Fuel Injection Pump |
| Inspection and Servicing | 179-183 | Fuel Oil, Lube Oil, Cooling Water, Fuel Injection Pump, Fuel Injection Valve, Cylinder Head, Electrical Equipment, Marine Gear |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder head fixing nut torque | 13.5 ~ 14.5 kg-m (98 ~ 105 ft-lb) | p. 182 |
| Nozzle valve opening pressure | 200 ~ 205 kg/cm² | p. 79 |
| Nozzle nut tightening torque | 6.5 ~ 7.5 kg-m (47.0 ~ 54.2 ft-lb) | p. 81 |
| Fuel feed pump head | 0.5 m | p. 83 |
| Fuel filter pressure loss | 3 ~ 5 mmHg | p. 86 |
| Fuel filter max. passing particle size | 10 μ | p. 86 |
| Oil filter filtration mesh | 150 mesh | p. 100 |
| Oil filter max. flow capacity | 1050 L/hr | p. 100 |
| Minimum battery capacity | 12V, 120AH | p. 148 |
| Fully charged battery specific gravity | 1.280 | p. 148 |
| Cooling Water Capacity (at 2,100 rpm) | 1,350 L/hr | p. 8 |
| Connecting Rod Tightening Bolt Torque | 9.5 ~ 10.5 kg-m | p. 182 |
