Komatsuengine(no series)
Komatsu 6D105-1M-PF(S/N 15149-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu 6D105-1M-PF engine (S/N 15149-UP) is a 6-cylinder, turbocharged, direct-injection diesel powerplant used in the D40A-3 and D40PF-3 crawler dozer series. These machines belong to the mid-size earthmoving class with an operating weight range of approximately 22,000 to 24,000 lb (10,000 to 11,000 kg). Production for this specific engine serial range occurred during the late 1990s and early 2000s. The 6D105-1M-PF succeeded earlier 6D105 variants and was later replaced by the S6D105-1 series in subsequent dozer generations. Configurations offered included standard and low-ground-pressure (LGP) tracks, with power output rated at 170 hp (127 kW) and 550 lb-ft (745 Nm) of torque.
Across the 6D105 series generations, changes included updates to fuel injection timing, turbocharger efficiency, and emissions compliance to meet evolving Tier standards. The 6D105-1M-PF remains significant in the used and parts market because it powers the widely distributed D40 series dozers, which are common in road construction and grading. Its simple mechanical design and robust block make it a preferred candidate for rebuild. The engine's longevity and the availability of aftermarket components keep it relevant for fleet managers maintaining older, high-hour dozers.
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 6D105-1M-PF(S/N 15149-UP) specifications
Engine
| Model | 6D105-1M-PF |
| Series/Generation | 6D105 Series |
| Configuration | Turbocharged, Direct Injection |
| Displacement | 6.5 l (396 cu. inch) |
| Cylinders | 6 |
| Gross Power | 170 hp (127 kW) |
| Net Power | 170 hp (127 kW) |
| Torque | 550 lb-ft (746 N·m) |
| 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 |
Service capacities (summary)
| Fuel Tank | Not documented for this exact serial range — verify with your dealer |
| Hydraulic System | Not documented for this exact serial range — verify with your dealer |
| Engine Oil | Not documented for this exact serial range — verify with your dealer |
| Cooling System | 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 6D105-1M-PF(S/N 15149-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 6D105-1M-PF(S/N 15149-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Monitor KOWA oil samples at every 500-hour interval to detect iron and copper wear metals from the 6D105-1M-PF crankshaft and bearings. Check coolant SCA concentration at 500 hours to prevent liner cavitation in the cylinder block. Inspect hydraulic oil particle count to protect the dozer's main control valve. Track fuel dilution levels to identify piston ring wear. Use KOMTRAX telematics to monitor engine load frequency and identify abnormal fuel burn rates that signal injector issues.
Corrective & Common Repairs
Address excessive oil consumption by inspecting piston rings and cylinder liners in the 6D105-1M-PF block. Replace turbocharger seals if blue smoke indicates boost leakage. Repair hydraulic leaks at the boom and stick cylinder seals common in D40 dozers. Replace worn track rollers and idlers to maintain proper undercarriage tension. Fix electrical faults by checking the engine controller power supply and sensor wiring for corrosion. Replace the fuel filter if water contamination causes hard starting.
Overhaul & Rebuild Points
Perform an inframe overhaul when the 6D105-1M-PF reaches 10,000 hours or shows significant power loss. Replace pistons, rings, and liners to restore compression. Inspect the crankshaft for journal wear and replace bearings if clearance exceeds limits. Check the camshaft and rocker arm shaft for wear. Rebuild the turbocharger if shaft play is detected. Inspect the cylinder head for cracks and resurface the valve seats. Replace the water pump and thermostat during the overhaul.
Seasonal & Environment Servicing
In cold weather, use lower viscosity engine oil and ensure the coolant mixture meets the ambient temperature requirements. Check the battery charge regularly as cold temperatures reduce capacity. In dusty environments, clean the air filter more frequently and inspect the intake system for leaks. In high-humidity areas, drain the fuel separator daily to prevent water contamination. Inspect the radiator and oil cooler fins for debris buildup to maintain cooling efficiency. Grease all undercarriage points more often in muddy conditions.
6D105-1M-PF(S/N 15149-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 600-311-9100 | Fuel Filter Ass'Y | Fuel system service | Check fitment → |
| (6136-71-6100) | Fuel Filter Ass'Y,(See Fig.408) | Fuel system service | Check fitment → |
| 09019-08035 | Wrench,Filter (For Add. Fuel Filter) | Fuel system service | Check fitment → |
| 09637-02161 | Plate? Instruction,Air Cleaner (Double Element) | Air intake service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
6D105-1M-PF(S/N 15149-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine crankshaft speed sensor failure | Faulty crankshaft speed sensor, damaged wiring harness, or corroded connector at the sensor pin. | Inspect the sensor wiring and connector for damage or corrosion. Verify voltage at the pin connector. Replace the speed sensor if the circuit is intact. |
| CA111 | Internal engine controller fault | Malfunction within the Electronic Control Module (ECM) or engine controller. | Inspect ECM power connections, fuses, and ground wires. Replace or reprogram the ECM if the fault persists. |
| CA451 | Common rail pressure sensor feedback value too high | Malfunction in the rail pressure sensor, actual overpressure condition, or sensor wiring issue. | Diagnose the fuel rail pressure sensor and check pump lines for blockage or leaks. Verify sensor feedback values. |
| CA452 | Common rail pressure sensor feedback value too low | Fuel pressure regulator (IMV/PCV) malfunction, fuel leak, or sensor failure. | Evaluate the fuel pump regulator and check for fuel leaks. Test the pressure sensor circuit. |
| CA122 | Intake air pressure sensor feedback voltage too high | Faulty intake air pressure sensor or shorted wiring. | Verify the intake pressure sensor operation and inspect the wiring harness for shorts or damage. |
| CA123 | Intake air pressure sensor feedback voltage too low | Sensor short circuit or severe airflow restriction. | Check for a sensor short or inspect the air intake system for restrictions. Test the sensor voltage. |
| CA234 | Engine overspeed | Throttle calibration error, engine load cycle issue, or operator misuse. | Verify throttle calibration and check the engine load cycle. Inspect the governor mechanism. |
| CA441 | Battery voltage too low | Weak battery, failing alternator, or loose connections. | Replace the battery or alternator as needed. Check the voltage regulator and tighten all connections. |
| CA442 | Battery voltage too high | Failing voltage regulator or alternator malfunction. | Replace the alternator or battery. Check the voltage regulator for proper operation. |
| AA10NX | Air cleaner clogging | Clogged air filter element due to dust or debris. | Replace the air filter element. Inspect the intake system for leaks. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
6D105-1M-PF(S/N 15149-UP) attachments & work tools
Dozer Blade Configurations
The Komatsu D40A-3, D40F-3, D40P-3, and D40PF-3A dozers (S/N 6001-Up) utilizing the 6D105-1M-PF engine (S/N 15149-49999) are equipped with straight or semi-U dozer blades. Factory guarding options include side cutters and end bits to protect the blade edges during heavy grading and pushing operations.
Ripper Attachments
Compatible with the D40 series dozers, single-shank or multi-shank rippers are offered for soil preparation and rock breaking. These attachments mount to the rear frame and require hydraulic lines for depth control and shank positioning, integrated with the machine's main hydraulic system.
Excavator Bucket Families
For PC200-1, PC200-2, and PC200LC-2 excavators powered by the 6D105-1 series, standard digging, heavy-duty, and rock buckets are available. Typical capacities for this class range from 0.8 to 1.2 cubic meters (1.0 to 1.5 cubic yards), selected based on material density and application requirements.
Excavator Breaker/Hammer Kits
Hydraulic breaker kits are offered for the PC200 series, requiring specific high-flow hydraulic connections and mounting brackets. The engine's hydraulic pump output must be matched to the breaker's flow requirements, and guarding options include side protectors and chisel holders to prevent damage during operation.
Motor Grader Blade Options
GD405A-1 motor graders using the 6D105-1 engine (S/N 12218-49999) feature moldboard blades with varying widths and angles. Factory options include wing extensions and snow plow attachments, with hydraulic controls for blade tilt, angle, and offset to accommodate diverse grading tasks.
Wheel Loader Bucket Types
WA200-1 wheel loaders equipped with the 6D105-1 engine utilize general purpose, light material, and heavy-duty buckets. Capacities typically range from 1.5 to 2.5 cubic meters (2.0 to 3.2 cubic yards), with quick coupler systems available for rapid attachment changes in loading and material handling applications.
All 6D105-1M-PF(S/N 15149-UP) assemblies by section
Every catalogued assembly group for the Komatsu 6D105-1M-PF(S/N 15149-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Cooling System
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Cooling System : Corrosion Resistor
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 5 |
| 01***29 | Washer,Spring (Cold Weather Spec.) | 4 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Cooling System : Water Pump And Cooling Fan
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 6 |
Cylinder Block
Komatsu : 6d105-1m-Pf(S/N 15149-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 : 6d105-1m-Pf(S/N 15149-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 : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Block : Cylinder Block(#15149-49999)
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***75 | Bolt,(For 75a Alternator) | 1 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 4 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Block : Cylinder Block(#50001-)
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***75 | Bolt,(For 75a Alternator) | 1 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 4 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Block : Engine Support
| 01***40 | Bolt,(Dust And Dirt Protection) | 8 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 8 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 8 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Block : Flywheel And Flywheel Housing
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 8 |
| 01***70 | Bolt, Spacer | 2 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 6 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Block : Front Cover
| 01***22 | Bolt,(Cold Terrain Spec.) | 4 |
| 01***25 | Bolt,(Without Auto Priming System) | 4 |
| 01***60 | Bolt,(Without Alternator Bracket) | 10 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Block : Oil Pan
| 01***22 | Bolt,(Cold Terrain Spec.) | 29 |
| 01***25 | Bolt,(Without Auto Priming System) | 10 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Block : Piston And Connecting Rod
| 04***18 | Ring, Retaining | 2 |
| 61***12 | Piston Ass'Y | 6 |
| 61***30 | Piston Ring Ass'Y | 6 |
Cylinder Head
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Head : Air Cleaner And Mounting
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 13 |
| 01***30 | Bolt,(For France Noise Suppression) | 7 |
| 01***06 | Nut, Regular Hexagon (M8-1.25) | 6 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Head : Air Cleaner And Mounting (High Altitude Spec.)(#55043-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 5 |
| 01***30 | Bolt,(For France Noise Suppression) | 7 |
| 01***06 | Nut, Regular Hexagon (M8-1.25) | 6 |
Komatsu : 6d105-1m-Pf(S/N 15149-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 : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Head : Air Intake Manifold And Connection (High Altitude Spec.)(#55043-)
| 01***20 | Bolt | 2 |
| 01***50 | Bolt,(For Trimming Dozer) | 2 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 10 |
Komatsu : 6d105-1m-Pf(S/N 15149-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,(Without Oil Pressure Switch) | 7 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Head : Cylinder Head Cover(#15149-79362)
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***08 | Nut (Welded) | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 2 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Head : Cylinder Head Cover(#79363-)
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***08 | Nut (Welded) | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Head : Exhaust Manifold
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***60 | Bolt (M10-1.50x60) | 1 |
| 01***00 | Bolt (M10-1.50x100) | 12 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Head : Exhaust Manifold And Turbocharger (High Altitude Spec.)(#55043-)
| 01***60 | Bolt (M10-1.50x60) | 1 |
| 01***00 | Bolt (M10-1.50x100) | 11 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 2 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Head : Muffler
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***11 | Nut (M14-1.50 Thd), Nut; Was 01582-01411 | 2 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Head : Muffler (High Altitude Spec.)(#55043-)
| 01***40 | Bolt, Mount Retainer | 4 |
| 01***50 | Bolt | 4 |
| 01***08 | Nut (Welded) | 8 |
Komatsu : 6d105-1m-Pf(S/N 15149-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 : 6d105-1m-Pf(S/N 15149-Up) : Cylinder Head : Turbocharger (High Altitude Spec.)(#55043-)
| 61***00 | Turbocharger Ass'Y | 1 |
| GA***00 | Clamp | 3 |
| GA***01 | Bolt | 6 |
Electrical System
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Electrical System : Alternator (13a)(#63408-)
| 60***60 | Alternator A. (13a),(With Non Hardening Pulley) | 1 |
| KD***31 | Bushing,Insulator | 2 |
| KD***80 | Packing | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Electrical System : Alternator (25a)(#15149-68686)
| 60***51 | Alternator A. (25a) | 1 |
| KD***52 | Bolt,Through | 3 |
| KD***70 | Rear Bracket Ass'Y | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Electrical System : Alternator (25a)(#68687-)
| 60***30 | Alternator A. (25a),(With Non Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***11 | Rear Bracket Ass'Y | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Electrical System : Alternator (35a) (Hardening Pulley Type)
| 60***40 | Alternator A. (35a) | 1 |
| KD***31 | Bushing,Insulator | 2 |
| KD***57 | Bearing,Ball? Front | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Electrical System : Alternator (35a) (Non Hardening Pulley Type)
| 60***60 | Alternator A. (35a),(With Non Hardening Pulley) | 1 |
| KD***31 | Bushing,Insulator | 2 |
| KD***57 | Bearing,Ball? Front | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Electrical System : Alternator And Mounting (13a)(#63408-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
| 01***11 | Nut,(For Center Guard) | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Electrical System : Alternator And Mounting (25a)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***30 | Bolt | 1 |
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Electrical System : Alternator And Mounting (35a) (Hardening Pulley Type)
| 01***65 | Bolt,(For Alternator Bracket Mount) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***70 | Bolt,(With Wear Guard) | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Electrical System : Alternator And Mounting (35a) (Non Hardening Pulley Type)
| 01***65 | Bolt,(For Alternator Bracket Mount) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***70 | Bolt,(With Wear Guard) | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Electrical System : Regualtor And Heater Signal
| 60***70 | Switch,Air Intake Heater | 1 |
| 60***60 | Switch,Heater Relay | 1 |
| 60***71 | Signal,Signal | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Electrical System : Starting Motor (5.5kw) (Dust And Water Proof Type)
| 60***51 | Starting Motor Ass'Y,(5.5kw) | 1 |
| KD***10 | Clutch Ass'Y,Over Running | 1 |
| KD***60 | Metal,Center | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Electrical System : Starting Motor (5.5kw)(#15149-81558)
| 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 : 6d105-1m-Pf(S/N 15149-Up) : Electrical System : Starting Motor (5.5kw)(#81559-)
| 60***80 | Starting Motor Ass'Y,(5.5kw) | 1 |
| KD***30 | Bracket,Center | 1 |
| KD***50 | Clutch Ass'Y,Over Running | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Electrical System : Starting Motor (7.5kw) (Bad Check And Large Capacity Type)
| 60***10 | Starting Motor Ass'Y,(7.5kw) | 1 |
| KD***80 | Washer Ass'Y,(Not Shown) | 1 |
| KD***90 | Field Coil Ass'Y | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Electrical System : Starting Motor (7.5kw) (For Large Capacity Type)
| 60***81 | Starting Motor Ass'Y,7.5kw | 1 |
| KD***70 | Center Bracket A | 1 |
| KD***90 | Field Coil Ass'Y | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Electrical System : Starting Motor And Mounting
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 3 |
| 01***36 | Washer,Radio Controlled Slag Handling | 3 |
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
Fuel System
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Additional Fuel Filter
| 07***12 | Gasket,Mechanical Pump Piping | 2 |
| 60***00 | Fuel Filter Ass'Y | 1 |
| 60***20 | Cartridge,Pref | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Fuel Filter
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 1 |
| 60***10 | Plug,(For Shipping) (Not Shown) | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Fuel Injection Pump (Coupling)
| DK***00 | Bolt | 6 |
| DK***00 | Bolt | 1 |
| DK***30 | Coupling Ass'Y | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Fuel Injection Pump (Coupling) (High Altitude Spec.)(#55043-)
| DK***00 | Bolt | 1 |
| DK***00 | Washer,Lock | 2 |
| DK***00 | Coupling,Cross | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Fuel Injection Pump (Feed Pump)
| DK***00 | Spring,Piston | 1 |
| DK***20 | Piston | 1 |
| DK***40 | Feed Pump Ass'Y | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Fuel Injection Pump (Feed Pump) (High Altitude Spec.)(#55043-)
| DK***20 | Bolt, Joint | 1 |
| DK***20 | Pump,Priming | 1 |
| DK***20 | Housing | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)
| DK***90 | Governor Ass'Y | 1 |
| DK***00 | Adapter | 1 |
| DK***20 | Capsule,Spring | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2) (High Altitude Spec.)(#55043-)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
| DK***80 | Nut | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)
| DK***70 | Bolt | 2 |
| DK***40 | Gasket,Air Compressor | 2 |
| DK***20 | Capsule,Spring | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2) (High Altitude Spec.)(#55043-)
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
| DK***40 | Bolt | 2 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Fuel Injection Pump (Pump) (1/2)
| 61***30 | Injection Pump Ass'Y | 1 |
| DK***30 | Bearing | 2 |
| DK***20 | Shim, 1.40mm; Was Dk029311-7220, Shim? 1.4mm | 0 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Fuel Injection Pump (Pump) (1/2) (High Altitude Spec.)(#55043-)
| 61***40 | Injection Pump Ass'Y | 1 |
| DK***10 | Washer,Spring | 1 |
| DK***30 | Bearing | 0 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Fuel Injection Pump (Pump) (2/2)
| DK***00 | Sleeve,Control | 6 |
| DK***00 | Screw | 6 |
| DK***00 | Spring | 6 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Fuel Injection Pump (Pump) (2/2) (High Altitude Spec.)(#55043-)
| DK***00 | Sleeve,Control | 6 |
| DK***00 | Holder,Delivery Valve | 6 |
| DK***00 | Screw | 6 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Fuel Injection Pump And Piping
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***70 | Bolt | 4 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Fuel Nozzle And Spill Pipe(#15149-49999)
| 01***55 | Bolt,(For Trimming Dozer) | 12 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 12 |
| 07***12 | Gasket,Mechanical Pump Piping | 2 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Fuel Nozzle And Spill Pipe(#50001-)
| 01***55 | Bolt,(For Trimming Dozer) | 12 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 12 |
| 07***12 | Gasket,Mechanical Pump Piping | 2 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Water Separator
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 60***00 | Water Separator A.,(4d105-5h? 4d105-5t) | 1 |
| 60***60 | Plug,Drain (4d105-5h? 4d105-5t) | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Fuel System : Water Separator And Mounting (For Pakistan)(#86581-)
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***30 | Bolt,(Cold Weather Spec.) | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 2 |
Lubricating Oil System
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Lubricating Oil System : Lubricating Oil Cooler(#15149-49999)
| 01***25 | Bolt,(Without Auto Priming System) | 5 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
| 01***35 | Bolt,(Without Auto Priming System) | 16 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Lubricating Oil System : Lubricating Oil Cooler(#50001-)
| 01***25 | Bolt,(Without Auto Priming System) | 5 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
| 01***35 | Bolt,(Without Auto Priming System) | 16 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Lubricating Oil System : Lubricating Oil Filter And Mounting
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***35 | Bolt,(Without Auto Priming System) | 1 |
| 01***90 | Bolt | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Lubricating Oil System : Lubricating Oil Pump And Suction Pipe(#15149-49999)
| 01***25 | Bolt,(Without Auto Priming System) | 3 |
| 01***50 | Bolt,(For Trimming Dozer) | 4 |
| 01***30 | Bolt,(For France Noise Suppression) | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Lubricating Oil System : Lubricating Oil Pump And Suction Pipe(#50001-)
| 01***25 | Bolt,(Without Auto Priming System) | 3 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***40 | Bolt,(For Position Fixing) | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Lubricating Oil System : Turbocharger Lubricating Oil Piping (High Altitude Spec.)(#55043-)
| 01***22 | Bolt,(Cold Terrain Spec.) | 2 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 2 |
Tool And Engine Kit
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Tool And Engine Kit : Gasket Kit
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***95 | O-Ring,Transmission Strainer | 1 |
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
Komatsu : 6d105-1m-Pf(S/N 15149-Up) : Tool And Engine Kit : Tool
| 09***35 | Wrench,Filter (For Add. Fuel Filter) | 1 |
6D105-1M-PF(S/N 15149-UP) serial number reference
The PIN plate is riveted to the right-hand side of the cab on the lower frame, typically just behind the front idler or beneath the operator's window. The prefix is the first three characters of the 17-character ISO PIN found on the emissions/export plate.
| Prefix | Identifies | Notes |
|---|---|---|
| D40A | Dozer | Serial range 6001-Up. Engine model 6D105-1M-P (S/N 15149-49999). Source: DK Engine Parts Equipment Guide. |
| D41A | Dozer | Engine model 6D105-1. Source: 6D105 Series Komatsu Engine Repair Service Manual PDF. |
| D41S | Dozer | Engine model 6D105-1. Source: 6D105 Series Komatsu Engine Repair Service Manual PDF. |
| EG80 | Excavator | Engine model 6D105-1. Source: 6D105 Series Komatsu Engine Repair Service Manual PDF. |
| EG805 | Excavator | Engine model 6D105-1. Source: 6D105 Series Komatsu Engine Repair Service Manual PDF. |
| GD405A | Grader | Engine model 6D105-1. Source: 6D105 Series Komatsu Engine Repair Service Manual PDF. |
| PC150 | Excavator | Engine model 6D105-1. Source: 6D105 Series Komatsu Engine Repair Service Manual PDF. |
| PC150LC | Excavator | Engine model 6D105-1. Source: 6D105 Series Komatsu Engine Repair Service Manual PDF. |
| PC200 | Excavator | Engine model 6D105-1. Source: 6D105 Series Komatsu Engine Repair Service Manual PDF. |
| PC200LC | Excavator | Engine model 6D105-1. Source: 6D105 Series Komatsu Engine Repair Service Manual PDF. |
| PC220 | Excavator | Engine model 6D105-1. Source: 6D105 Series Komatsu Engine Repair Service Manual PDF. |
| PC220LC | Excavator | Engine model 6D105-1. Source: 6D105 Series Komatsu Engine Repair Service Manual PDF. |
| W60 | Loader | Engine model 6D105-1. Source: 6D105 Series Komatsu Engine Repair Service Manual PDF. |
| W70 | Loader | Engine model 6D105-1. Source: 6D105 Series Komatsu Engine Repair Service Manual PDF. |
| WA200 | Loader | Engine model 6D105-1. Source: 6D105 Series Komatsu Engine Repair Service Manual PDF. |
Frequently asked questions
What engine does the Komatsu 6D105-1M-PF (S/N 15149-UP) power?
It powers the D40A-3 and D40PF-3 crawler dozers.
What is the operating weight of the machine equipped with this engine?
The operating weight varies by configuration but typically ranges from 22,000 to 24,000 lb (10,000 to 11,000 kg).
What engine replaced the 6D105-1M-PF in later Komatsu dozers?
The S6D105-1 series engine replaced the 6D105-1M-PF in subsequent generations.
What 6D105-1M-PF(S/N 15149-UP) owners discuss
What are the known powertrain and hydraulic behaviors for the Komatsu 6D105-1M-PF(S/N 15149-UP) engine?
The engine utilizes a turbocharged aspiration system with direct injection fuel delivery. Factory specifications cite a net power output of 170 horsepower and 550 lb-ft of torque. The powertrain is designed for heavy-duty construction and mining applications, including excavators and wheel loaders. Hydraulic system performance varies by configuration and series, requiring verification against the specific machine model's operation and maintenance manual for exact flow and pressure ratings. The engine is compatible with Komatsu Genuine Lubricants, including diesel engine oil, hydraulic oil, and super-coolant AF-NAC, which meet Komatsu Engineering Standards. Always consult the factory spec sheet for the exact hydraulic capacity and powertrain oil specifications for the installed attachment package.
What undercarriage or wear patterns are typical for machines equipped with this engine series?
Machines in this class typically operate within a weight range of 9,182 to 87,083 lb, influencing ground pressure and undercarriage wear rates. Undercarriage wear patterns depend heavily on the specific machine model (e.g., excavator vs. dozer), track shoe width, and duty cycle. Heavy production work accelerates wear on track links, rollers, and idlers. Fleet cost notes indicate that undercarriage wear is a primary ownership cost driver. Inspect track tension, roller rotation, and sprocket tooth profile regularly. The operating weight class determines the required track shoe width and ground pressure limits. Verify specific undercarriage wear intervals and replacement thresholds in the operation and maintenance manual for the specific machine serial range.
What are the engine quirks per the 6D105-1M-PF(S/N 15149-UP) series?
The 6D105-1M-PF is part of the 6D105 series, which includes variants such as 6D105-1, 6D105-1A, 6D105-1C, 6D105-1D, and S6D105-1. The serial prefix 15149-UP indicates a specific build generation within this series. Common operational quirks include sensitivity to fuel system contamination and cooling system integrity. The engine requires strict adherence to Komatsu genuine parts for replacement to maintain performance. Overheating prevention is critical; avoid overloading the engine and ensure the cooling system functions properly. The engine is designed to be durable and withstand harsh operating conditions, but proper maintenance is essential for longevity. Consult the Komatsu service manual for specific adjustment values and torque specifications for this serial range.
What are the common electrical or sensor issues associated with this engine?
Common electrical issues often stem from starter motor failures or sensor malfunctions. The engine typically uses a 24V electrical system with a 13T, 5.5KW starter motor. Sensor issues can affect engine performance and diagnostics. Regular inspection of wiring harnesses, connectors, and sensor grounds is recommended. The engine control system relies on accurate sensor data for fuel injection and timing. If the engine does not start, check the fuel supply, battery, starter, and ignition system. Electrical system integrity is crucial for reliable operation. Verify specific sensor locations and testing procedures in the factory spec sheet or service manual for the 6D105-1M-PF(S/N 15149-UP) engine.
What should be checked when buying a used machine with the 6D105-1M-PF(S/N 15149-UP) engine?
When purchasing a used machine, verify the engine serial number to confirm it falls within the 15149-UP range. Check the engine oil pressure, which should be within the specified range (e.g., 65-80 PSI for similar core engines, but verify with the specific manual). Inspect the cooling system for leaks and proper coolant level. Check the fuel system for contamination and proper injector operation. Examine the air filter and intake system for blockages. Verify the condition of the turbocharger and exhaust system. Check the hydraulic system for leaks and proper fluid levels. Review the maintenance history for regular oil and filter changes. Ensure the engine runs smoothly without excessive smoke or unusual noises. Consult the operation and maintenance manual for specific inspection points and tolerances for this engine series.
What are the critical safety considerations for maintenance on this engine?
Always stop the engine before adding fuel or oil, or while cleaning the machine. Ensure good ventilation when working inside the engine compartment. Thoroughly wash the engine and clean filler caps, grease fittings, and the area around dipsticks to prevent dirt or dust from entering the system. Always use Komatsu genuine parts for replacement. Use the grades of grease and oil recommended by Komatsu, choosing the viscosity specified for the ambient temperature. Use pure oil or grease and clean containers. Prevent any dirt from getting into the oil. Strictly observe all accident prevention guidelines. Have your dealer verify safety protocols and specific maintenance procedures for the 6D105-1M-PF(S/N 15149-UP) engine.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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