Part of the Yanmar Repair Manuals.
Torque a cylinder head on a 4JH5E from memory and you are betting a head gasket, and a second teardown, on a number you half remember. This Yanmar service manual covers the 3JH5E, 4JH5E, 4JH4-TE, and 4JH4-HTE marine diesels: 380 pages in English, Yanmar publication 0BJHM-G00200.
It carries the figures a rebuild stands on. The Engine section holds the special and standard torque charts, sealants, and specifications. Fuel System covers tests, servicing, and injector pressures with shim correction. Cooling System walks the seawater circuit, Lubrication covers the trochoid pump, and the turbo models get their own Turbocharger section. Wiring diagrams, a troubleshooting chart, and full service standards close it out.
As a PDF download with 409 bookmarks, the same pages sit on the laptop at the bench and the phone down in the engine compartment.
Complete the set for your 3JH5E, 4JH5E, 4JH4-TE…
Other editions of this manual
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 5-6 | Revision History |
| Safety | 7-16 | Safety Statements, Location of Safety Labels |
| General Service Information | 17-92 | Engine Outline Drawings, Piping Diagrams, Exhaust Gas Emission Regulations, Location of Nameplates, Diesel Fuel, Engine Oil, Engine Coolant |
| Periodic Maintenance | 93-100 | EPA Requirements, Periodic Maintenance Schedule, Periodic Maintenance Procedures |
| Engine | 101-202 | Special Torque Chart, Standard Torque Chart (W/O Lubricating Oil), Sealants and Compounds, Measuring Instruments, Special Service Tools, Specifications |
| Fuel System | 203-258 | Fuel System Components, Fuel System Diagram, Fuel System Tests, Servicing the Fuel System, Special Service Tools, Specifications |
| Cooling System | 259-284 | Cooling Flow Diagram, Draining / Refilling Seawater Cooling System, Measuring Instruments, Tests and Adjustments, Special Service Tools, Specifications |
| Lubrication | 285-296 | Repair, Tests and Adjustments, Special Service Tools, Specifications |
| Turbocharger | 297-308 | Turbocharger Components, Washing the Turbocharger Blower, Cleaning the Air Cleaner, Special Service Tools, Specifications |
| Starter Motor | 309-314 | Starter Motor Specifications, Starter Motor Troubleshooting, Starter Motor Service |
| Alternator | 315-324 | Alternator Service, Specifications |
| Electrical | 325-350 | Component Locations, Wiring Diagram, Instrument Panel, Function Description - Warning Devices |
| Troubleshooting | 351-362 | Troubleshooting Chart, Measuring Compression Pressure, After Troubleshooting or Repair |
| Service Standards | 363-380 | Engine Tuning, Engine Body, Lubricating Oil System (Trochoid Pump), Main Bolt and Nut, Standard Bolts and Nuts (W/O Lubricating Oil) |
Every system also includes safety precautions.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 3JH5E, 4JH5E | ||
| Fuel Supply Restriction (3JH5E, 4JH5E) | 400 mmAq (16 in.Aq) | p. 206 |
| Fuel Injector Pressure | 20.5-21.6 MPa (2986-3132 psi) | p. 223 |
| Connecting Rod Bolt Torque | 44.1 ± 5.0 N-m | p. 106 |
| Oil Pressure (Idle) | 0.05 MPa or more | p. 290 |
| 4JH4-TE | ||
| Fuel Supply Restriction, 4JH4-TE | 1000 mmAq (40 in.Aq) | p. 206 |
| 4JH4-HTE | ||
| Fuel Supply Restriction Excluding Fuel Filter Loss Pressure | 1000 mmAq (40 in.Aq) | p. 206 |
| All Models | ||
| Injection Pressure Change per Shim Thickness | 1.9 MPa (275 psi) per 0.1 mm (0.004 in.) shim thickness | p. 255 |
| Cylinder Head Bolt Torque | 88.2 ± 3.0 N-m | p. 106 |
| 4JH4-TE, 4JH4-HTE | ||
| Turbine Shaft End Nut Torque | 20±2 N·cm (196±19 lb-in) | p. 300 |
