Part of the Yanmar Repair Manuals.
The governor inside a Yanmar MP2 or MP4 fuel injection pump is the hardest job in this book: small weights, a tension lever clearance measured in thousandths, and no room for guesswork on reassembly. Yanmar service manual 0BMP0-U00100 was written for exactly that work, covering the MP series pumps fitted to 3TNV82A, 3TNV84(T), 3TNV88, 4TNV84(T), 4TNV88, 4TNV94, 4TNV98(T), and 4TNV106(T) industrial engines.
Across 104 pages it steps through governor disassembly and installation, fuel pump teardown and reassembly, bench adjustment of high idle, rated, and torque fuel delivery, and nozzle service with opening pressure specifications by engine model. Torque tables for MP2 and MP4 pumps mean parts go back to spec instead of by feel, and a fuel system troubleshooting chart closes the book.
It downloads as a bookmarked English PDF you can print or keep at the bench, whether the engine lives in a tractor, a genset, a boat, or on a stand.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 5-6 | |
| Safety | 7-12 | |
| General Service Information | 13-28 | Fuel Injection Pump, Fuel Injection Pump Nameplate, Specifications, Measuring Instruments, Pump Torque Specifications (MP2 / MP4 Models) |
| Governor | 29-52 | Disassembly, Assembly, Installation |
| Fuel Injection Pump | 53-80 | Fuel Pump Disassembly, Fuel Pump Reassembly |
| Adjustment | 81-88 | Setup and Inspection, Component Identification, High Idle Fuel Delivery, Rated Fuel Delivery, Torque Fuel Delivery, Fuel Pump Timing Index Stamping Identification |
| Fuel Injection Nozzle | 89-98 | Specifications, Nozzle Body Identification Number, Special Service Tools, Operation, Disassembly, Reassembly |
| Troubleshooting | 99-104 | Fuel System Troubleshooting Chart |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Fuel filter element replacement | Disassemble and clean, or replace element | p. 101 |
| Governor Tension Lever Side Clearance | 0.001 - 0.002 in. (0.3 - 0.6 mm) | p. 17 |
| Oil Feed Pressure | 2.8-4.3 psi (19.6 - 29.4 kPa, 0.2 - 0.3 kgf/cm²) | p. 83 |
| Fuel Injector Nozzle Case Nut Torque | 29 - 33 ft-lb (39 - 44 N·m; 4 - 5 kgf·m) | p. 92 |
| 3TNV82A, 4TNV82A, 3TNV88, 4TNV88 (Model: CL, ID mark: W) | ||
| Fuel Injector Opening Pressure (3TNV82A, 4TNV82A, 3TNV88, 4TNV88 (Model: CL, ID mark: W)) | 2843 - 2988 psi (19.6 - 20.6 MPa; 200 - 210 kgf/cm²) | p. 90 |
| 3TNV84T, 4TNV84T, 4TNV94T, 4TNV98T, 4TNV106T (Model: CL, ID mark: V*) | ||
| Fuel Injector Opening Pressure (3TNV84T, 4TNV84T, 4TNV94T, 4TNV98T, 4TNV106T (Model: CL, ID mark: V*)) | 3133 - 3278 psi (21.6 - 22.6 MPa; 220 - 230 kgf/cm²) | p. 90 |
| 3MP2 | ||
| Dry Weight, 3MP2 | 18.5 lb (8.4 kg) | p. 17 |
| 4MP4 | ||
| Dry Weight, 4MP4 | 25.4 lb (11.5 kg) | p. 17 |
| MP2/MP4 | ||
| Delivery Valve Holder Torque | 30 - 33 ft-lb (40 - 45 N·m) | p. 19 |
| Governor Weight Nut Torque | 59 - 62 ft-lb (79 - 84 N·m) | p. 21 |
| MP2 | ||
| Plunger and Barrel Seal Plug Torque | 22 - 26 ft-lb (30 - 35 N·m) | p. 19 |
| Camshaft Drive Nut Torque | 58 - 65 ft-lb (78 - 88 N·m) | p. 19 |
