Part of the Yanmar Repair Manuals.
A weak travel motor on a B22-2 can park a whole crew while you guess at whether the fault is a cross-plumbed hose, a sticking pilot valve, or low main relief pressure. Yanmar publication 17197020 takes the guessing out. It is the factory service manual for the B22-2 and B22-2A crawler excavators, covering both the 3TN75L and 3TNE78A diesel engines across 448 pages.
The book runs from full engine disassembly (cylinder block, crankshaft, timing gear) through the hydraulic system, undercarriage and track adjustment, swing system, electrical equipment, and a troubleshooting section that sorts real breakdowns from non-breakdowns. Servicing standards list wear limits and tightening torques so worn parts get measured, not guessed at.
It arrives as a 10.76 MB PDF with 134 bookmarks, downloadable right after purchase and printable page by page. Pull the torque before you pull the bolt, and the second teardown never happens.
Complete the set for your B22-2, B22-2A
- Parts Catalog: Yanmar B22-2A Parts Catalog
What's Inside This Yanmar B22-2, B22-2A Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 6-14 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Attaching and Detaching Hydraulic Equipment |
| Technical Data | 15-26 | Specifications, External Drawing and Working Ranges, Weight of Main Parts, Lifting Capacities |
| Servicing Standards | 27-43 | Machine Performance, Engine, Undercarriage, Control Devices, Hydraulic Equipment, Work Implement, List of Tightening Torque |
| Engine | 44-88 | Cylinder Block, Cylinder Head, Piston and Piston Pins, Connecting Rods, Crankshaft and Main Bearing Metal, Camshaft and Tappets, Timing Gear |
| Operating Circuit | 90-133 | Hydraulic Circuit Schematic |
| Hydraulic System | 134-207 | Hydraulic Pump, Valve Ass'y, Relief Valve, Pilot Pump, Piston Pump |
| Cut-Off Valve | 208-218 | Relief Valve, Solenoid-Operated Directional Control Valve, Manual Directional Control Valve |
| Pilot Valve | 219-245 | Handle, Port Plate, Pressure Reducing Valve Section, Spool, Casing, Push Rod, Joint |
| Control Valve | 246-272 | Right Valve Group, Center Valve Group, Left Valve Group, System Relief Valve, Circuit Relief Valves, Anti-Void Valve |
| Swing Motor | 273-289 | Orbit Motor, Pinion Gear Assembly, Brake Valve, Damper, Valve Body, Cartridge, Geroller |
| Travel Motor | 290-332 | Counter-Balance Valve, Relief Valve, Two-Speed Switch Mechanism, Reduction Gear |
| Pressure Adjustment | 333-339 | PTO Selector Valve (for Merging with Hydraulic PTO) |
| Adjustment Procedures for Each Equipment | 340-404 | Electrical Equipment of the Machine, Undercarriage, Controls, Swing System, Hydraulic Equipment, Cabin |
| Periodic Inspection | 405-407 | List of Periodic Inspection and Servicing |
| Fuel, Lube Oil and Grease Recommended | 408-409 | Fuel, Lube Oil and Grease Recommended by Yanmar |
| Troubleshooting | 410-446 | Non-Breakdowns |
| Reference Data | 447-448 | Bucket Installation Dimension |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Hydraulic system air-venting operation time | 10~15 minutes | p. 14 |
| Hydraulic cylinder air-venting cycles | 4 to 5 times | p. 14 |
| Sprocket bolt tightening torque | 8.0~10.0 kgf-m | p. 41 |
| Track roller tightening nut torque | 14~19 kgf-m | p. 41 |
| Hydraulic hose clamp (at boom rear) tightening torque | 4.5~6.0 kgf-m | p. 42 |
| Hydraulic hose clamp (for 3rd hose) tightening torque | 8.0~10.0 kgf-m | p. 42 |
| Hose clamp (at boom rear) tightening torque | 4.5~6.0 kgf-m | p. 42 |
| Hose clamp (for P.T.O. selector valve hose) tightening torque | 8~10 kgf-m | p. 42 |
| Oil Filter Replacement Interval | 500 hours | p. 71 |
| Thermostat Full-Open Temperature | 85°C | p. 73 |
| Rubber track models | ||
| Track tension adjustment (Rubber track) | 8~13mm | p. 350 |
| Steel track models | ||
| Track tension adjustment (Steel track) | 105~115mm | p. 351 |
