Komatsu S6D105-1V(S/N 61676-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu S6D105-1V engine (S/N 61676-UP) is a six-cylinder, turbocharged, direct-injection diesel powerplant used in the Komatsu 6D105 series family. It powers mid-size crawler excavators such as the PC200 and PC220, as well as wheel loaders like the WA300 and WA320, and motor graders including the GD500R and GD505. Operating weights for these machines typically range from 19,000 to 25,000 lb (8,600 to 11,300 kg). The S6D105-1V succeeded earlier S6D105-1 variants and was later replaced by the SAA6D107E-1 in newer Tier 4/Stage IIIa generations.
Across the 6D105 series generations, the primary changes involved the transition from mechanical fuel systems to electronic control units and the integration of emissions aftertreatment systems like the KDPF and SCR. The S6D105-1V remains significant in the used and parts market because it serves as the core powertrain for a massive installed base of PC200 and PC220 excavators. Its widespread use ensures high availability of aftermarket components and a deep knowledge base for rebuild, making it a critical reference point for fleet maintenance and resale valuation.
Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.
Komatsu S6D105-1V(S/N 61676-UP) specifications
Engine
| Model | S6D105-1V |
| Series | 6D105 Series |
| Cylinders | 6 |
| Displacement | 6.5 L (396 cu. in.) |
| Aspiration | Turbocharged |
| Fuel System | Direct injection, mechanical fuel system |
| Gross Power | 170 hp (127 kW) |
| Torque | 745 N·m (550 lb-ft) |
| Emissions Tier | Not documented for this exact serial range — verify with your dealer |
Weights
| Operating Weight | Not documented for this exact serial range — verify with your dealer |
| Shipping Weight | Not documented for this exact serial range — verify with your dealer |
| Ground Pressure | Not documented for this exact serial range — verify with your dealer |
Dimensions
| Transport Length | Not documented for this exact serial range — verify with your dealer |
| Transport Width | Not documented for this exact serial range — verify with your dealer |
| Transport Height | Not documented for this exact serial range — verify with your dealer |
| Track Gauge | Not documented for this exact serial range — verify with your dealer |
| Ground Clearance | Not documented for this exact serial range — verify with your dealer |
Performance
| Travel Speed | Not documented for this exact serial range — verify with your dealer |
| Gradeability | Not documented for this exact serial range — verify with your dealer |
| Dig Depth | Not documented for this exact serial range — verify with your dealer |
| Bucket Capacity | Not documented for this exact serial range — verify with your dealer |
Service capacities (summary)
| Engine Oil Refill Capacity | Varies by configuration/series (refer to engine model specific table in Operation and Maintenance Manual) |
| Cooling System Capacity | Varies by configuration/series (refer to engine model specific table in Operation and Maintenance Manual) |
| Hydraulic System Capacity | Not documented for this exact serial range — verify with your dealer |
| Fuel Tank Capacity | Not documented for this exact serial range — verify with your dealer |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Komatsu S6D105-1V(S/N 61676-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the S6D105-1V(S/N 61676-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize KOWA fluid analysis at every 500-hour interval to monitor engine wear metals (iron, copper, lead, aluminum) and contaminants. Track hydraulic particle count and viscosity changes to predict pump and valve failures. Monitor coolant pH and SCA concentration to prevent liner cavitation. Use KOMTRAX telematics to correlate load frequency and fuel burn with oil oxidation levels. Early detection of fuel dilution or coolant ingress in the S6D105-1V prevents catastrophic bearing damage and extends service intervals safely.
Corrective & Common Repairs
Address S6D105-1V turbocharger boost leaks and injector seal failures promptly to maintain torque output. Replace worn turbocharger shafts and bearings if oil consumption exceeds limits. Inspect and replace cracked high-pressure fuel lines common in older mechanical systems. Check for coolant leaks at the water pump seal and thermostat housing. Replace worn injector O-rings to prevent compression loss and black smoke. Verify electrical connector integrity on the ECU and sensor harnesses to avoid erratic idle or shutdown codes.
Overhaul & Rebuild Points
Plan the S6D105-1V inframe overhaul at approximately 10,000 to 12,000 hours or when compression drops below specification. Replace piston rings, liners, and bearings during the inframe stage. Perform a full teardown overhaul at 15,000 to 20,000 hours, replacing the crankshaft, camshaft, and cylinder head gaskets. Inspect the turbocharger housing for cracks and replace if necessary. Rebuild the fuel injection pump and injectors to restore precise fuel delivery and combustion efficiency.
Seasonal & Environment Servicing
In cold climates, use Komatsu EO or equivalent low-viscosity diesel engine oil to ensure cold-start reliability. Install block heaters and coolant warmers to prevent gel in fuel filters and reduce wear during startup. In dusty environments, service the air filter more frequently and check the restriction indicator daily. In high-humidity areas, drain the fuel water separator more often to prevent microbial growth. Verify DEF tank heater operation in freezing conditions to prevent crystallization and injection system blockages.
S6D105-1V(S/N 61676-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 600-311-8291 | Cartridge,Fuel Filter | Fuel system service | Check fitment → |
| 600-311-9100 | Fuel Filter Ass'Y | Fuel system service | Check fitment → |
| 6138-71-6100 | Fuel Filter Ass'Y,(See Fig.0419) | Fuel system service | Check fitment → |
| 6136-71-6120 | Cartridge,Engine Fuel Filter | Fuel system service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
S6D105-1V(S/N 61676-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine crankshaft speed sensor and backup speed sensor failure | Faulty crankshaft speed sensor, broken wiring harness, or corroded connector at the sensor pin | Inspect the speed sensor and wiring harness; replace the sensor if voltage is abnormal at the connector |
| CA111 | Internal engine controller fault | Electronic Control Module (ECM) internal failure or critical software error | Replace or reprogram the ECM |
| CA451 | Common rail pressure sensor feedback value too high | Malfunctioning rail pressure sensor, actual overpressure condition, or wiring short | Diagnose the fuel rail pressure sensor and check pump lines for blockage or leakage |
| CA452 | Common rail pressure sensor feedback value too low | Fuel rail pressure sensor failure, low fuel supply pressure, or open circuit | Check the fuel supply pump and pressure sensor circuit; verify fuel delivery |
| CA234 | Engine overspeed | Throttle calibration error, excessive engine load cycle, or operator misuse | Verify throttle calibration and inspect the engine load cycle for anomalies |
| CA122 | Intake air pressure sensor feedback voltage too high | Faulty intake pressure sensor, shorted wiring, or sensor signal error | Verify the intake pressure sensor operation and inspect the wiring harness for shorts |
| CA123 | Intake air pressure sensor feedback voltage too low | Sensor short circuit, airflow restriction, or wiring open circuit | Check for a sensor short or an airflow restriction in the intake system |
| CA153 | Intake air temperature sensor feedback voltage too high | Faulty Intake Air Temperature (IAT) sensor or wiring issue | Replace or test the IAT sensor for proper resistance and voltage output |
| CA441 | Battery voltage too low | Weak battery, failing alternator, or loose connections | Replace the battery or alternator; check the voltage regulator and connections |
| CA442 | Battery voltage too high | Failing voltage regulator or alternator overcharging | Replace the alternator or battery; check the voltage regulator operation |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
S6D105-1V(S/N 61676-UP) attachments & work tools
Crawler Dozer Blade Systems
The S6D105-1V engine is installed in D20, D21, D31, D40, and D41 crawler dozers. These machines utilize standard dozer blades and ripper attachments. Factory guarding options include ROPS/FOPS cabs and side guards for the undercarriage. Specific blade capacities vary by configuration and series.
Crawler Excavator Work Tools
The engine powers the PC200 and PC220 series excavators (PC200-1/2/3, PC220-1/2/3). Typical work tools include digging buckets, grading buckets, and rock buckets. Mounting systems utilize standard excavator quick couplers or pin-on connections. Hydraulic kit arrangements vary by configuration/series depending on the specific tool flow requirements.
Wheel Loader Attachments
The engine is used in WA300-1, WA320-1, and WA350-1 wheel loaders. Standard work tools include general purpose buckets, light material buckets, and rock buckets. Coupler systems are typically pin-on or quick-attach mechanisms. Factory configurations include varying bucket capacities based on the specific loader model and series.
Motor Grader Blades
The engine is fitted to GD405A-1, GD500R-2, GD505A-2, GD505R-2, GD521A-1, GD521R-1, GD523A-1, GD611A-1, and GD661A-1 motor graders. Work tools consist of moldboards, angle blades, and scarifiers. Mounting is integrated into the grader frame. Guarding options include operator protection structures.
Wheeled Excavator Tools
The engine is installed in the PW400MH-6 wheeled excavator. Work tools include standard digging buckets and hydraulic breakers. Hydraulic arrangements must match the machine's flow capacity. Mounting uses standard quick-attach or pin-on systems.
Industrial Engine Applications
The S6D105-1V is used in EG100-2, EG100S-2, and EG125-1/EG125S-1 industrial engines. These units do not use interchangeable work tools but are configured for power generation or pumping applications. Factory options include varying exhaust configurations and mounting bases.
All S6D105-1V(S/N 61676-UP) assemblies by section
Every catalogued assembly group for the Komatsu S6D105-1V(S/N 61676-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Cooling System
Komatsu : S6d105-1v(S/N 61676-Up) : Cooling System : Corrosion Resistor And Piping
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***29 | Washer,Spring (Cold Weather Spec.) | 4 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 4 |
Komatsu : S6d105-1v(S/N 61676-Up) : Cooling System : Water Pump And Cooling Fan (Water Pump With Non Hardening Pulley)
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
| 01***30 | Bolt,(For France Noise Suppression) | 6 |
Cylinder Block
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Block : Camshaft And Tappet
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 2 |
| 01***16 | Washer,(For Shipping) | 2 |
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Block : Crankshaft
| 01***25 | Bolt - Rear Guard Mounting | 6 |
| 01***36 | Washer,Radio Controlled Slag Handling | 6 |
| 61***11 | Bolt,Nylock (K2) | 1 |
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Block : Cylinder Block
| 01***30 | Bolt,(For France Noise Suppression) | 3 |
| 01***50 | Bolt | 1 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 4 |
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Block : Flywheel And Flywheel Housing
| 01***40 | Bolt,(Dust And Dirt Protection) | 9 |
| 01***60 | Bolt, Trunnion Cap | 2 |
| 01***35 | Screw | 6 |
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Block : Front Cover And Gear
| 01***22 | Bolt,(Cold Terrain Spec.) | 4 |
| 01***25 | Bolt,(Without Auto Priming System) | 4 |
| 01***60 | Bolt,(Without Alternator Bracket) | 8 |
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Block : Oil Pan(#61676-63902)
| 01***22 | Bolt,(Cold Terrain Spec.) | 29 |
| 01***25 | Bolt,(Without Auto Priming System) | 8 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Block : Oil Pan(#63903-)
| 01***22 | Bolt,(Cold Terrain Spec.) | 29 |
| 01***25 | Bolt,(Without Auto Priming System) | 8 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Block : Piston And Connecting Rod
| 04***18 | Ring, Retaining | 2 |
| 61***40 | Crank Pin Metal A | 6 |
| 61***00 | Connecting Rod Ass'Y,(B) | 6 |
Cylinder Head
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Head : Air Cleaner
| 01***08 | Nut,R.H. Thread | 8 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 8 |
| 01***16 | Washer,Radio Controlled Slag Handling | 8 |
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Head : Air Intake Manifold And Connection
| 01***20 | Bolt | 2 |
| 01***50 | Bolt,(For Trimming Dozer) | 2 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 10 |
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Head : Cylinder Head
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
| 07***08 | Plug (Kit) | 7 |
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Head : Cylinder Head Cover(#61676-79428)
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 2 |
| 02***22 | Bolt | 3 |
| 02***22 | Bolt | 2 |
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Head : Cylinder Head Cover(#79429-)
| 07***23 | Clamp - Hose | 1 |
| 07***00 | Clip | 1 |
| 07***30 | Clip | 1 |
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Head : Exhaust Manifold And Turbocharger
| 01***00 | Bolt (M10-1.50x100) | 12 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
| 02***38 | Bolt | 4 |
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Head : Muffler
| 61***50 | Gasket (K1) | 1 |
| 61***11 | Muffler | 1 |
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Head : Rocker Arm
| 01***80 | Bolt,(Shim 5 Pieces Over) | 2 |
| 01***06 | Nut, Regular Hexagon (M8-1.25) | 12 |
| 01***36 | Washer,Radio Controlled Slag Handling | 6 |
Komatsu : S6d105-1v(S/N 61676-Up) : Cylinder Head : Turbocharger (Except Japan)
| 61***00 | Turbocharger Ass'Y,(T04b-59) | 1 |
| GA***00 | Clamp | 3 |
| GA***01 | Bolt | 1 |
Electrical System
Komatsu : S6d105-1v(S/N 61676-Up) : Electrical System : Alternator (25a) (With Non Hardening Pulley)
| 60***60 | Alternator A. (25a),(With Non Hardening Pulley) | 1 |
| KD***37 | Bearing,Ball? Front | 1 |
| KD***72 | Slip Ring Ass'Y | 1 |
Komatsu : S6d105-1v(S/N 61676-Up) : Electrical System : Alternator And Mounting (25a) (Alternator With Non Hardening Pulley)
| 01***70 | Bolt | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 1 |
Komatsu : S6d105-1v(S/N 61676-Up) : Electrical System : Heater Signal And Heater Switch
| 60***70 | Switch,Air Intake Heater | 1 |
| 60***71 | Signal,Signal | 1 |
| 60***10 | Regulator Ass'Y | 1 |
Komatsu : S6d105-1v(S/N 61676-Up) : Electrical System : Starting Motor (5.5kw)(#61676-81586)
| 60***43 | Starting Motor A.,(5.5kw) (See Fig.0661) | 1 |
| KD***10 | Clutch Ass'Y,Over Running | 1 |
| KD***60 | Metal,Center | 1 |
Komatsu : S6d105-1v(S/N 61676-Up) : Electrical System : Starting Motor (5.5kw)(#81587-)
| 60***80 | Starting Motor Ass'Y,(5.5kw) | 1 |
| KD***30 | Bracket,Center | 1 |
| KD***50 | Clutch Ass'Y,Over Running | 1 |
Komatsu : S6d105-1v(S/N 61676-Up) : Electrical System : Starting Motor And Mounting (5.5kw)
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 3 |
| 01***36 | Washer,Radio Controlled Slag Handling | 3 |
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
Engine Kit
Komatsu : S6d105-1v(S/N 61676-Up) : Engine Kit : Gasket Kit
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
| 07***45 | O-Ring,(F4320-61a0 -16 ), O-Ring; Was 07000-02145 | 1 |
Fuel System
Komatsu : S6d105-1v(S/N 61676-Up) : Fuel System : Additionl Fuel Filter
| 07***12 | Gasket,Mechanical Pump Piping | 2 |
| 60***91 | Cartridge,Fuel Filter | 1 |
| 60***00 | Fuel Filter Ass'Y | 1 |
Komatsu : S6d105-1v(S/N 61676-Up) : Fuel System : Fuel Filter And Piping
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 4 |
| 01***16 | Washer,Radio Controlled Slag Handling | 2 |
Komatsu : S6d105-1v(S/N 61676-Up) : Fuel System : Fuel Injection Pump (Coupling)
| DK***00 | Bolt | 1 |
| DK***00 | Washer,Lock | 2 |
| DK***00 | Coupling,Cross | 1 |
Komatsu : S6d105-1v(S/N 61676-Up) : Fuel System : Fuel Injection Pump (Feed Pump)
| DK***20 | Bolt, Joint | 1 |
| DK***20 | Pump,Priming | 1 |
| DK***20 | Housing | 1 |
Komatsu : S6d105-1v(S/N 61676-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)
Komatsu : S6d105-1v(S/N 61676-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
| DK***40 | Bolt | 2 |
Komatsu : S6d105-1v(S/N 61676-Up) : Fuel System : Fuel Injection Pump (Pump)
| 61***00 | Injection Pump Ass'Y | 1 |
| DK***10 | Washer,Spring | 1 |
| DK***30 | Bearing | 0 |
Komatsu : S6d105-1v(S/N 61676-Up) : Fuel System : Fuel Injection Pump And Piping
| 01***70 | Bolt | 4 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
Komatsu : S6d105-1v(S/N 61676-Up) : Fuel System : Fuel Nozzle And Spill Pipe(#61376-)
| 01***55 | Bolt,(For Trimming Dozer) | 12 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 12 |
| 07***12 | Gasket,Mechanical Pump Piping | 2 |
Komatsu : S6d105-1v(S/N 61676-Up) : Fuel System : Water Separator
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 60***00 | Water Separator A.,(See Fig.2415) | 1 |
| 60***10 | Cover | 1 |
Lubricating Oil System
Komatsu : S6d105-1v(S/N 61676-Up) : Lubricating Oil System : Lubricating Oil Cooler
| 01***25 | Bolt,(Without Auto Priming System) | 5 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
| 01***35 | Bolt,(Without Auto Priming System) | 16 |
Komatsu : S6d105-1v(S/N 61676-Up) : Lubricating Oil System : Lubricating Oil Filter And Piping
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***35 | Bolt,(Without Auto Priming System) | 1 |
| 01***90 | Bolt | 1 |
Komatsu : S6d105-1v(S/N 61676-Up) : Lubricating Oil System : Lubricating Oil Pump And Suction Pipe
| 01***25 | Bolt,(Without Auto Priming System) | 3 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***45 | Bolt,(S6d155-4b) | 1 |
Komatsu : S6d105-1v(S/N 61676-Up) : Lubricating Oil System : Turbocharger Lubricating Oil Piping
| 01***22 | Bolt,(Cold Terrain Spec.) | 2 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 2 |
S6D105-1V(S/N 61676-UP) serial number reference
The engine serial number plate is located on the left side of the engine block, near the injection pump or on a metal plate affixed to the valve cover area. To read the prefix, identify the alphanumeric model code (e.g., S6D105-1V) stamped on the plate, which indicates the engine family and configuration, followed by the sequential serial number starting from 61676 for this specific range.
| Prefix | Identifies | Notes |
|---|---|---|
| S6D105-1V | Engine Model | Turbocharged, aftercooled inline-6 diesel engine. S/N 61676-UP identifies the specific production range for this engine variant. The 'V' suffix denotes a specific configuration within the S6D105-1 series. Source: published references catalog listing for S6D105-1V S/N 61676-UP. |
Frequently asked questions
What engine does the Komatsu S6D105-1V use?
The S6D105-1V is a six-cylinder, turbocharged, direct-injection diesel engine from the Komatsu 6D105 series family. It is mechanically controlled in earlier variants and electronically controlled in later versions, powering machines like the PC200 and PC220 excavators.
What is the operating weight of machines using this engine?
Operating weight varies by configuration and series. Machines powered by the S6D105-1V, such as the PC200 and PC220 excavators, typically range from 19,000 to 25,000 lb (8,600 to 11,300 kg) depending on the boom, stick, and undercarriage setup.
What replaced the Komatsu S6D105-1V?
The S6D105-1V was replaced by the SAA6D107E-1 engine in newer Komatsu excavator generations. The SAA6D107E-1 incorporates advanced emissions technology, including a KDPF and SCR system, to meet Tier 4 Final and Stage V regulations.
What S6D105-1V(S/N 61676-UP) owners discuss
What are the known powertrain and hydraulic behaviors associated with the Komatsu S6D105-1V engine series?
What undercarriage and wear patterns are typical for machines powered by this engine series?
What are the specific engine quirks and maintenance requirements for the S6D105-1V series?
What are the common electrical and sensor issues reported for this engine series?
What hydraulic behaviors should be monitored when the machine becomes weak when hot?
What should be checked when buying a used machine with the S6D105-1V engine (S/N 61676-UP)?
What is the safety-critical fix for engine overheating during heavy excavation?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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