Part of the Yanmar Repair Manuals.
All 754 pages of this Yanmar V120 Service Manual zero in on one machine: the V120 Wheel Loader, covering everything from TD/TCD 3.6L4 Stage IV & V engine workshop procedures to hydraulic circuits and full electrical diagnostics. Inside you get hydraulic circuit diagrams for Standard, Options, and High Flow configurations, complete wiring schematics with fuse assignments, relay assignments, and connector pinouts that trace every circuit in the machine. Open the Diagnosis section and you'll find a complete error code library for Dashboard software variants V1 and V4, SerDia 2010 SPN/FMI fault tables, and setting instructions for the A4VG085DA1 variable displacement pump and A6VM115DA motor. Set the oil drain plug to 55 Nm, then walk the V-belt tightening sequence at 30-42-30 Nm: exact, factory-verified numbers. Your machine is down. Pull up the PDF on your tablet, bookmarked and searchable, and get back to work.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 3-46 | Introduction / User Notice, Safety and Accident Prevention, Symbol and Hazard Descriptions, Tightening Torques for Pistons or Piston Nuts, Tightening Torques for Guide Bushings |
| Technical Data | 47-56 | Drift Values |
| Engine | 57-406 | Operating Manual Td - Tcd 3.6L4 Eu Stage Iv & V _ 06/2018 En, Workshop Manual TD_TCD 3.6 L4 Stage Iv & V _ 2018/07 En, Bleeding the Fuel System, AdBlue – DEF Installation |
| Hydraulics | 407-412 | Hydraulic Circuit Diagram - Standard, Hydraulic Circuit Diagram - Options, Hydraulic Circuit Diagram - High Flow |
| Setting Instructions | 413-438 | Hydromatik Tightening Values, Valve Description - HDM19WL, Variable Displacement Pump A4VG085DA1, Variable Displacement Motor A6VM115DA, Travel Hydraulics – Setting Instructions |
| Functional Description | 439-442 | Pilot Control Device 4TH6 with Handle Options |
| Electrics | 443-534 | Cable Colors Overview, Vehicle Electrics 0102-V02, Fuse Assignment, Relay Assignment, Diesel Engine Control Unit Structural Diagram, Fan Control Unit Structural Diagram |
| Maintenance | 535-544 | Specification for Fuels, Lubricants, And Coolants, Unbenannt |
| Operation | 545-618 | Keypad Operation, Instructions for Using the Combo-Tool |
| Options | 619-628 | Exhaust Gas After-Treatment System – Diesel Particle Filter Replacement |
| Repair Instructions | 629-652 | Fitting Hydraulic Screw Connections, Adhesive Kit – Cab Windows, Ride Control System - "Rcs" |
| Diagnosis / Tools | 653-754 | Special Tools - Purchased Parts, Diagnostic Messaging Specification, Error Codes: Dashboard - Software Variants, SerDia 2010 - Diagnoses- and Error Codes Spn / Fmi |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tightening torque for lubricating oil drain plug | 55 Nm | p. 112 |
| Tightening torque for V-belt (Screw 1) | 30 Nm | p. 122 |
| Tightening torque for starter mounting screws | 42.5 Nm | p. 336 |
| Starter power | 12 V / 3.2 kW | p. 50 |
| Tightening torque for relay (Heating flange, starter, glow plugs) hexagon nut | 4.5 - 5.5 Nm | p. 345 |
| Tightening torque for relay holder (Starter) hexagon head screw | 13 Nm | p. 420 |
| Fuse for ignition lock | 7.5 A | p. 522 |
| Ground strap size | 50mm², 300mm, M10 | p. 506 |
| Battery cable size (positive terminal) | M10 70 mm² | p. 499 |
| Battery cable size (negative terminal) | 70mm² | p. 502 |
| Measuring hoses (mini measurement) lengths | 2000 mm, 3200 mm, 5000 mm, 6000 mm | p. 35 |
| Tightening torque for DKO hose fittings (M12 x 1.5) | 18 Nm | p. 420 |
