Part of the Yanmar Repair Manuals.
Trace a fault on a B37V from the pilot valve through the control valve to the travel motor, and this Yanmar service manual walks every system in between: engine, hydraulic pump, swing motor, undercarriage, electrical equipment, and cabin. It covers the B37V excavator fitted with the 3TNE88-B1A and 3TNE88-EB1 diesel engines, across 325 pages of factory procedures, servicing standards, and troubleshooting tables.
Most jobs stall for want of one number: a valve clearance, a crawler wear limit, a tightening torque. The Servicing Standards section gathers those figures in one place, including torque lists for both the machine and the engine, so the crew is not standing around while you guess.
As a PDF download it rides on the laptop in the cab or prints page by page for the bench, which means the right spec is in hand the first time, not after the machine is already apart.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| B37V | 1 | Specifications, Machine Dimensions and Working Ranges, Lifting Capacities, Machine Performance, Engine, Hydraulic Equipment |
| General Cautions for Maintenance Work | 6-15 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Technical Data | 16-27 | Specifications, Machine Dimensions and Working Ranges (Canopy Type, Cabin Type), Component Weights, Lifting Capacities |
| Servicing Standards | 28-45 | Machine Performance, Engine, Undercarriage (Rubber Crawler Specifications, Steel Crawler Specifications, Common Specifications of Steel & Rubber Crawlers), Control Devices |
| Engine | 46-104 | Measurement |
| Hydraulic System | 105-141 | Outline (Control Valve Operation, Additional Operation of Control Valve), Hydraulic Circuit Schematic (Standard Specifications) |
| Hydraulic Equipment | 142-232 | 6-1 Hydraulic Pump, 6-2 Control Valve, 6-3 Pilot Valve, 6-4 Swing Motor, 6-5 Travel Motor |
| Adjustment and Repair | 233-282 | 7-1 Electric Equipment of the Machine, 7-2 Undercarriage, 7-3 Control, 7-4 Swing Bearing, 7-5 Hydraulic Equipment, 7-6 Cabin |
| Periodic Inspection and Servicing | 283-285 | List of Periodic Inspection and Servicing |
| Fuel, Lube Oil and Grease Recommended | 286-287 | Fuel, Lube Oil and Grease Recommended by Yanmar |
| Troubleshooting | 288-323 | 10-1 Non-Breakdowns, 10-2 Troubleshooting |
| Reference Data | 324-325 | 11-1 Specifications for Attachment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Sprocket tightening torque | 8.0 to 10.0 kgf·m | p. 43 |
| Cylinder head bolt tightening torque | 6.8 to 7.2 (M9x1.25) kgf·m | p. 45 |
| O-ring to back ring clearance (swivel joint) | within 3% of the shaft dia. | p. 270 |
| V-belt tension deflection | 10 to 15mm | p. 50 |
| Engine Rated Output | 21.0 kW (28.5 PS) at 2300 rpm | p. 21 |
