Part of the Yanmar Repair Manuals.
Need the factory reference for your Yanmar B7-5B excavator? This 725-page service manual PDF walks you through every system, from engine cylinder head and EGR procedures to hydraulic pump teardown and swing motor rebuild. Open to the hydraulic chapter and you get full circuit schematics with pressure adjustment procedures and circuit operation detail; the wiring section maps out the entire electronic control system. Includes exploded views of every major hydraulic component, tightening torque tables for machine and engine fasteners, and a troubleshooting section with fault-by-fault isolation charts and non-breakdown diagnostics. Torque the engine mount vibroisolating rubber bolt (M16, Grade 10.9T) to 205.9–235.4 N·m. The radiator-side mount bolt (M12) gets 107.9–127.5 N·m. No more chasing values through forum posts. Bookmarked by section; pull it up on your tablet and get straight to the spec you need.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 12-25 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Technical Data | 26-39 | Specifications (Machine Body, Engine), Outline Drawing and Working Area, Weight List of Main Parts, Lifting Capacity List |
| Service Standards | 40-61 | Machine Performance, Engine, Undercarriage (Rubber Crawler Specifications, Steel Crawler Specifications, Common Specifications of Steel & Rubber Crawlers), Controls |
| Engine | 62-231 | 4-1 Engine, 4-2 Fuel System, 4-3 Cooling System, 4-4 Lubrication System, 4-5 Starter Motor, 4-6 Alternator, 4-7 Electronic Control System, 4-8 Electric Wiring |
| Hydraulic System | 232-269 | 5-1 Outline, 5-2 Hydraulic Circuit Schematic, 5-3 Circuit Operation, 5-4 Pressure Adjustment |
| 6-1 Hydraulic Pump | 270-312 | |
| 6-2 Control Valve | 313-364 | |
| 6-3 Pilot Valve | 365-375 | |
| 6-4 Swing Motor | 376-429 | |
| 6-5 Travel Motor | 430-577 | |
| Adjustment and Repair | 578-675 | 7-1 Electric Equipment of the Machine, 7-2 Undercarriage, 7-3 Controls, 7-4 Swing Bearing, 7-5 Hydraulic Equipment, 7-6 Work Implements |
| Periodic Inspection and Servicing | 676-679 | 8-1 List of Periodic Inspection and Servicing |
| Fuel, Lube Oil and Grease Recommended | 680-683 | Fuel, Engine Oil, Hydraulic Oil, Travel Reduction Gear Oil, Cooling Water, Grease, Antifreeze, Mixture Ratio of Cooling Water and Antifreeze |
| Troubleshooting | 684-721 | 10-1 Non-Breakdowns, 10-2 Troubleshooting |
| Reference Data | 722-725 | 11-1 Specifications for Attachment, 11-2 Standard Bucket Specifications |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine mount vibroisolating rubber bolt (M16 (10.9T)) | 151.9 to 173.6 ft·lbf (205.9 to 235.4 N·m) | p. 55 |
| Engine × Engine mount (Radiator side) bolt (M12 (10.9T)) | 79.6 to 94.0 ft·lbf (107.9 to 127.5 N·m) | p. 55 |
| Hydraulic hose length variation at high pressure | +2 % to -4 % | p. 15 |
| Pipe joint bolt tightening torque (M8) | 9.40 to 12.32 ft·lbf (12.7 to 16.7 N·m) | p. 59 |
| Pipe joint bolt tightening torque (M12) | 18.07 to 25.30 ft·lbf (24.5 to 34.3 N·m) | p. 59 |
| Fan belt size | A42 | p. 32 |
| Radiator cap pressure | 13.1 PSI (0.09 MPa) | p. 32 |
| Radiator fan quantity and diameter | 6 × Ø16.1 in. (Ø410 mm) | p. 32 |
| Thermostat opening temperature | 159.8 °F (71 °C) | p. 32 |
| Thermostat full-open temperature | 179.6 °F (82 °C) | p. 32 |
| Hydraulic oil tank capacity (In the tank) | 15.05 Gals. (57 L) | p. 29 |
| Hydraulic oil tank capacity (Other parts) | 11.35 Gals. (43 L) | p. 29 |
