All 858 pages of this Yanmar SV120 2PB Service Manual zero in on one machine: your compact excavator, from the complete Deutz Td/TCD 3.6 L4 engine workshop procedures to the last hydraulic return circuit. Open it and you get full vehicle wiring diagrams, hydraulic schematics covering the variable displacement pump, triple gear pump, and pilot-operated control circuits, plus setting instructions for the GFT 17 T3 travel drive and SX14 control valve. The diagnostics section alone includes 67 SerDia 2010 error codes with SPN/FMI fault classification, and a dedicated section covers DPF replacement, downtime regeneration, and SCR warning strategy. Torque the M12 x 1.5 hose fittings to 18 Nm and set the engine oil filter to 10-12 Nm. Your machine is down and the clock is running. Bookmarked by section, keyword-searchable on any device; grab it on your tablet and walk straight to the machine.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| L6 (M12 x 1.5) hose line tightening torque | 18 Nm | p. 114 |
| Fuel pre-filter insert tightening torque | 17 Nm - 18 Nm | p. 114 |
| Engine oil filter tightening torque | 10 Nm - 12 Nm | p. 111 |
| Dry air filter replacement interval | Every 2 years | p. 109 |
| Coolant hose spring band clip tightening torque | 1.5 Nm | p. 772 |
| Working light, cab (optional) | H9_12V/65W | p. 48 |
| Engine output acc. to ISO 3046 | 85 kW | p. 47 |
| Rated engine speed | 2000 min⁻¹ | p. 47 |
| Boom cylinder (Mono) drift | 3.0 mm / min | p. 53 |
| Main pressure relief valve (Control valve 1 mono bloc boom) | 380 bar | p. 50 |
| Slewing pressure (valve on slewing motor) | 220 bar | p. 51 |
| Lube oil change volume (with filter) | 9 l | p. 137 |
Yanmar SV120 2PB Common Problems This Manual Covers
Yanmar SV120 2PB excavator boom dropping under load with visible fluid around the control valve block. p. 53
Inspect the main pressure relief valve on the mono bloc boom control valve and verify it reaches 380 bar. Check the technical data on page 53 to confirm boom cylinder drift does not exceed 3.0 mm / min. Torque any loose L6 (M12 x 1.5) hose lines to 18 Nm.
Manual Section: Technical DataEngine turns over but will not start or stumbles heavily during cold morning startups.
Drain the water separator immediately. Review the troubleshooting procedures for misfires and no-start conditions. If replacing the element, torque the new fuel pre-filter insert to 17 Nm - 18 Nm. Ensure the engine oil pressure reads at least 1.3 bar at lower idle when warm.
Manual Section: Engine Faults and Corrective MeasuresTemperature gauge spikes into the red zone after an hour of heavy digging with visible steam. p. 761
Inspect all cooling passages and clean debris from the radiator grilles. Check the repair instructions on page 761 for piping connections. If replacing lines, tighten the coolant hose spring band clips to exactly 1.5 Nm. Verify the V-belt AVX 13 pre-tension is set to 650 N.
Manual Section: Repair InstructionsCab exterior floodlights fail to illuminate during pre-operation checks despite a good fuse and active switch.
Verify the switch toggle continuity using the wiring diagram. Inspect the bulb housing for corrosion. Replace faulty bulbs with the specified H9_12V/65W working light unit. Test the circuit to ensure steady voltage reaches the optional cab light harness before reassembling the housing.
Manual Section: ElectricsFrequently Asked Questions
How do I reset the YANMAR SV120 2PB fault code?
The manual indicates that for some errors, rectifying the fault and then switching off the ignition for about 30 seconds can clear the diagnostics lamp. For specific issues like DPF soot and ash levels, a specialized diagnostic tool called SERDIA is required to reset the stored values in the ECU after replacing the filter (page 733).
How do I reset the YANMAR SV120 2PB service indicator?
The manual does not provide a general user-level procedure to reset a service indicator. For DPF-related service requirements, such as filter replacement due to ash loading, the soot and ash content stored in the ECU must be reset using the SERDIA service tool (page 725).
What do YANMAR SV120 2PB error codes mean?
The manual provides a comprehensive list of Diagnostic Trouble Codes (DTCs) for the EMR4 KWP system, including SPN, FMI, failure type, function/module, number, and a detailed description of the error. For example, DTC 622A01 (SPN 207361, FMI 2) indicates 'DATA ERRATIC, INTERMITTENT OR INCORRECT' for the HMI, meaning 'No communication to the HMI (Display or dashboard)' (page 789).
How do I clear an engine derate or warning light on a YANMAR SV120 2PB?
Clearing an engine derate or warning light typically requires addressing the underlying fault. In hazardous situations, an 'Engine override switch' on the diagnostic interface (page 714) can temporarily deactivate the shut-off procedure, allowing the machine to be moved. However, this is a temporary bypass, and the activation is registered in the engine control system.
How will I receive this Service Manual?
You get a 858-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Are there any print restrictions on this manual?
There are no print restrictions. The PDF is DRM-free — print whatever sections you need for the shop. Standard letter or A4 paper works.
Are there hydraulic schematics in this Yanmar SV120 2PB manual?
Yes, this Yanmar SV120 2PB Service Manual includes hydraulic system diagrams, circuit schematics, and component specifications.
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