Part of the Yanmar Repair Manuals.
All 392 pages of this Yanmar JH4 Series Service Manual (OEM #0BJH4-G00102) zero in on one job: putting your 3JH4E, 4JH4AE, 4JH4-TE, or 4JH4-HTE marine diesel back to factory spec. If you've been hunting for a Yanmar 4JH4-TE service manual PDF that covers the full machine, this is it: electrical wiring diagrams, fuel flow schematics, cooling circuit diagrams, and a dense bank of step-by-step procedures spanning every system from turbocharger to raw-water cooling. The troubleshooting chapter walks you through a structured fault chart plus compression diagnostics; flip to the engine section for a special torque chart, standard fastener values, and a complete service standards appendix. Set cylinder head bolts to 85.2-91.2 N·m; on the -TE and -HTE, the injection pump drive gear nut gets 59-69 N·m. Every hour at the dock costs money. Bookmark-navigable and keyword-searchable; open it on your tablet and get to work.
Complete the set for your 3JH4E, 4JH4AE, 4JH4-TE…
- Parts Catalog: Yanmar 4JH4AE Parts Manual
- Operator Manual: Yanmar 4JH4-TE, 4JH5E, 3JH5E, 4JH4-HTE, 4JH4-HTE1 Marine Engines Operator Manual (incl. Wiring)
Other editions of this manual
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 5-6 | Revision History |
| Safety | 7-16 | Safety Statements, Safety Precautions, Location of Safety Labels |
| General Service Information | 17-74 | Safety Precautions, Engine Outline Drawings, Engine Piping Diagrams, Location of Nameplates, Diesel Fuel, Engine Oil, Engine Coolant, Principal Engine Specifications |
| Periodic Maintenance | 75-84 | Epa Requirements, Periodic Maintenance Schedule, Periodic Maintenance Procedures |
| Engine | 85-198 | Safety Precautions, Specifications, Special Torque Chart, Standard Torque Chart (Without Lubricating Oil), Special Service Tools, Measuring Instruments, Sealants and Compounds |
| Fuel System | 199-264 | Safety Precautions, Specifications, Special Service Tools, Fuel System Components, Fuel Flow Diagram, Fuel System Tests, Fuel System Service |
| Cooling System | 265-296 | Safety Precautions, Specifications, Special Service Tools, Measuring Instruments, Cooling Flow Diagram, Tests and Adjustments, Drain and Refill Seawater Cooling System |
| Lubrication | 297-310 | Safety Precautions, Specifications, Special Service Tools, Tests and Adjustments, Repair |
| Turbocharger | 311-322 | Safety Precautions, Specifications, Turbocharger Components, Special Service Tools, Washing the Turbocharger Blower, Clean Air Cleaner |
| Starter Motor | 323-328 | Safety Precautions, Starter Motor Specifications, Starter Motor Troubleshooting, Starter Motor Service |
| Alternator | 329-338 | Safety Precautions, Specifications, Alternator Service |
| Electrical | 339-364 | Safety Precautions, Component Locations, Wiring Diagram, Instrument Panel, Function Description - Warning Devices |
| Troubleshooting | 365-376 | Safety Precautions, Troubleshooting Chart, Troubleshooting by Measuring Compression Pressure, After Troubleshooting or Repair |
| Service Standards | 377-392 | Engine Tuning, Engine Body, Lubricating Oil System (Trochoid Pump), Main Bolt and Nut, Standard Bolts and Nuts (Without Lubricating Oil) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Oil Pressure Alarm Trigger Threshold | below 0.01-0.03 MPa (0.1-0.3 kgf/cm2, 1.42-4.26 psi) | p. 358 |
| Raw-water Impeller Replacement Criteria | Replace if cracks, broken vanes or excessive wear | p. 286 |
| Lubricating Oil Filter tightening torque | 20 - 24 N·m (177-212 lb-in) | p. 306 |
| Thermostat Opening Temperature | 75-78°C (167-172°F) | p. 273 |
| Thermostat Full Open Temperature | 90°C (194°F) | p. 273 |
| Coolant Recovery Tank Capacity (Full) | 0.8 L | p. 289 |
| 3JH4E, 4JH4AE, 4JH4-TE, 4JH4-HTE | ||
| Cylinder Head Bolt tightening Torque (Final) | 85.2-91.2 N·m (62.9~67.3 lb-ft) | p. 143 |
| 4JH4AE | ||
| Fuel Nozzle Retainer Bolt | 26.4 ± 2.0 N·m (19.5 ± 1.5 lb-ft) | p. 185 |
| Engine Oil Capacity (Total), 4JH4AE | 5.0 ± 0.3 L | p. 63 |
| 4JH4-TE, 4JH4-HTE | ||
| Fuel Injection Pump Drive Gear Nut | 59-69 N·m (44-51 lb-ft) | p. 183 |
| Engine Oil Capacity (Total) (4JH4-TE, 4JH4-HTE) | 5.7 ± 0.3 L | p. 67 |
| 3JH4E | ||
| Engine Oil Capacity (Total), 3JH4E | 5.0 ± 0.3 L | p. 62 |
