Part of the Yanmar Repair Manuals.
All 403 pages of this service manual are dedicated to one compact excavator: engine, hydraulic circuits, undercarriage, electric systems, and every step-by-step procedure from control valve teardown to swing bearing reinstallation. Inside you get hydraulic schematics for each operating circuit, including boom, arm, bucket, swing, travel, and blade, plus wiring diagrams tracing the LCD monitor, alarm system, and engine start/
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | Correct Work, Safety Precautions, Disassembly and Reassembly, Hydraulic Equipment Removal and Installation, Hydraulic Piping, Handling Seals, Hydraulic Hose Installation | |
| Technical Data | Specifications, Outline Drawing and Working Area, Weight List of Main Parts, Lifting Capacity List, Periodic Inspection and Servicing, Fuel, Lube Oil and Grease Recommended | |
| Service Standards | Machine Performance, Engine Nominal and Allowable Values, Undercarriage Specifications, Controls, Hydraulic Equipment, Implement, List of Tightening Torque, Pressure Adjustment | |
| Engine | Safety Statements, Cylinder Head Components, Fuel System, Cooling System, Lubrication System, Starter Motor, Alternator, Electric Wiring | |
| Electric System | Electric Equipment Layout, LCD Monitor and Alarm Systems, Engine Start and Stop Circuit, Battery Charge, Error Code List | |
| Hydraulic System | Outline, Circuit Operation (Boom, Arm, Bucket, Swing, PTO, Blade, Travel), Hydraulic Pump Disassembly/Reassembly, Control Valve Repair, Pilot Valve Repair, Swing Motor | |
| Adjustment and Repair | Engine and Electric Equipment Removal/Reinstallation, Undercarriage Removal/Reinstallation, Controls Adjustment, Swing Bearing, Hydraulic Equipment Removal/Reinstallation | |
| Troubleshooting | Non-Breakdowns, Machine and Engine Troubleshooting, Low Output, Overheating, Smoke Emission, Starter Motor, Charging Failure, Work Implement Issues |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Travel motor to Track frame tightening torque | 46 to 54 N•m | p. 57 |
| Swing motor to Turning frame tightening torque | 116 to 138 N•m | p. 57 |
| Hydraulic hose clip tightening torque | 2,5 to 3,5 N•m | p. 57 |
| Parallel pipe thread (G (PF) 1/8) tightening torque | 13.7 to 16.7 N•m | p. 61 |
| Taper pipe thread (G (PF) 1/8) tightening torque | 6.9 to 8.8 N•m | p. 61 |
| Fuel filter filtration area | 432 cm² | p. 25 |
| Oil/water separator type | Mesh filter | p. 25 |
| Air cleaner type | Cyclone type | p. 25 |
| Air cleaner filtration area | 4400 cm² | p. 25 |
| LO filter type | Full flow filter | p. 25 |
| LO filter filtration area | 800 cm² | p. 25 |
