Part of the Yanmar Repair Manuals.
All 530 pages of this Yanmar B7-3(US) Service Manual (OEM #4630010) zero in on one machine: your compact excavator, from crawler undercarriage to hydraulic pump and everything between. You get a full hydraulic circuit schematic with circuit-by-circuit operation for boom, arm, bucket, swing, blade, and travel; wiring diagrams covering the complete electrical system with monitor and alarm layouts; plus a torque reference table specifying M8 pipe joint bolts at 9.40–12.32 ft·lbf and M12 at 18.07–25.30 ft·lbf. Torque the bleeder valve fitting to 3.61–5.06 ft·lbf, keep the hose inside diameter at 0.20 in., and bleed air from the hydraulic circuit before startup. Your Yanmar b7-3(us) service manual pdf search is over. Every hour the machine sits idle costs money. Bookmarked and keyword-searchable, so you jump straight to the right procedure, pull up the spec, and get the excavator back in the ground.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 7-18 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Technical Data | 19-32 | Specifications, Outline Drawing and Working Area (Canopy Type, Cabin Type), Weight List of Main Parts, Lifting Capacity List |
| Service Standards | 33-52 | Machine Performance, Engine, Undercarriage (Rubber Crawler Specifications, Steel Crawler Specifications, Common Specifications of Steel & Rubber Crawlers), Controls |
| Hydraulic System | 53-90 | Outline (Control Valve Operation, Additional Operation of Control Valve), Hydraulic Circuit Schematic (Standard Specifications) |
| Hydraulic Equipment | 91-264 | Removal and Reinstallation of Hydraulic Pump, Removal and Reinstallation of Control Valve, Removal and Reinstallation of Swing Motor, Removal and Reinstallation of Swivel Joint |
| Adjustment and Repair | 265-368 | Electric Equipment of the Machine (Parts Layout of Electrical Equipment, Monitor and Alarm Systems, Wiring Diagram, Stop Motor Operation, Removal and Reinstallation of Engine, Removal and Reassembly of Starter Motor) |
| Periodic Inspection and Servicing | 369-371 | List of Periodic Inspection and Servicing |
| Fuel, Lube Oil and Grease Recommended | 372-373 | Fuel, Engine Oil, Hydraulic Oil, Swing Reduction Gear Oil, Travel Reduction Gear Oil, Cooling Water |
| Troubleshooting | 374-530 | Non-Breakdowns (Natural Release of Bucket, Discontinuous Arm Movement, Drifting of Upperstructure on Quick Travel Operation, Thermal Shock of Travel Motor) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Bleeder valve hose inside diameter | 0.20 in. (5 mm) | p. 18 |
| Bleeder valve tightening torque | 3.61 to 5.06 ft·lbf (4.9 to 6.7 N·m) | p. 18 |
| Pipe joint bolt M8 tightening torque | 9.40 to 12.32 ft•lbf (12.7 to 16.7 N•m) | p. 52 |
| Pipe joint bolt M12 tightening torque | 18.07 to 25.30 ft•lbf (24.5 to 34.3 N•m) | p. 52 |
| Hydraulic pump piping tightening torque | 3.62 to 4.34 ft•lbf (4.9 to 5.9 N•m) | p. 338 |
| Pilot control piping tightening torque | 2.89 to 3.62 ft•lbf (3.9 to 4.9 N•m) | p. 342 |
| System relief set pressure (Piston pump P1) | 3552.5 PSI (24.5 MPa) | p. 87 |
| System relief set pressure (Piston pump P2) | 3552.5 PSI (24.5 MPa) | p. 87 |
| Swing motor case pressure (maximum) | 42.7 PSI (0.29 MPa) | p. 225 |
| Bleeder valve tightening torque (hydraulic pump air release) | 3.61 to 5.06 ft·lbf (4.9 to 6.7 N·m) | p. 18 |
| System relief set pressure (Gear pump P3) | 2987.0 PSI (20.6 MPa) | p. 87 |
| Engine Oil Capacity | 10.78 Qts. (10.2 L) | p. 373 |
