Komatsuengine(no series)
Komatsu SAA4D102E-2E-4(S/N 26274903-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu SAA4D102E-2E-4 is a four-cylinder, turbocharged, air-to-air intercooled diesel engine belonging to the 102 Series family. It powers mid-size crawler excavators such as the PC120-6 and PC130-6, as well as compact wheel loaders and dozers. Operating weights for these machines typically range from 12,000 to 15,000 kg (26,455 to 33,069 lb). Production of this engine generation spans the early 2000s through the mid-2010s. It succeeded the SAA4D102E-1 series and was eventually replaced by the SAA4D102E-2E-4 and later SAA4D102E-2G-4 variants to meet evolving emissions standards. Configurations offered include Tier 2 and Tier 4 Interim packages depending on the specific machine model and regional market.
Across the SAA4D102E lineage, changes primarily involved emissions control hardware, such as the addition of Diesel Oxidation Catalysts (DOC) and Diesel Particulate Filters (DPF) for Tier 4 compliance, and updates to the fuel injection calibration. The SAA4D102E-2E-4 remains significant in the used and parts market because it serves as the heart of the highly durable PC120-6 and PC130-6 excavators, which are ubiquitous in rental fleets and small-to-medium contracting. Its simple mechanical architecture and widespread availability of aftermarket support keep it relevant for rebuilds and long-term serviceability.
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 SAA4D102E-2E-4(S/N 26274903-UP) specifications
Engine
| Model | SAA4D102E-2E-4 |
| Series | SAA4D102E |
| Displacement | 3.9 liters (238 CID) |
| Cylinders | 4 cylinder in line |
| Bore | 102 mm (4.02 in) |
| Stroke | 120 mm (4.72 in) |
| Aspiration | Turbocharged, air to air intercooled |
| Emissions Tier | Tier 2 |
| Net Power | 97-112 kW (130-150 hp) @ 2500 rpm |
| Torque | 280-300 Nm (207-221 lb.ft) @ 1500 rpm |
| Compression Ratio | 16.5:1 |
Weights
| Engine Weight | 390 kg (860 lb) |
Dimensions
| Engine Length | 790 mm (31 in) |
| Engine Width | 711 mm (28 in) |
| Engine Height | 894 mm (35 in) |
Performance
| Note | Travel speeds, lift/dig/dump/drawbar, and gradeability are machine-specific values not documented for the SAA4D102E-2E-4 engine in the provided sources. These figures vary by configuration/series depending on the host machine (e.g., PC120-6, PC160-7). |
Service capacities (summary)
| Note | Fuel tank, hydraulic system, engine oil, and cooling system capacities are not documented for the SAA4D102E-2E-4 engine in the provided sources. These figures vary by configuration/series depending on the host machine. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Komatsu SAA4D102E-2E-4(S/N 26274903-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 SAA4D102E-2E-4(S/N 26274903-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Komatsu Oil Wear Analysis (KOWA) at every 500-hour interval to monitor engine oil wear metals, hydraulic fluid particle count, and coolant pH levels. Track SCA concentration in the cooling system to prevent cavitation and scaling. Use KOMTRAX telematics to monitor engine load frequency and fuel burn rates, identifying efficiency drops that signal injector or turbocharger degradation before catastrophic failure occurs.
Corrective & Common Repairs
Address common SAA4D102E-2E-4 issues by inspecting the turbocharger housing for oil leaks and checking the intercooler piping for cracks that cause black smoke. Replace the fuel filter and water separator promptly to prevent injector wear. Inspect the oil cooler core for blockage, which leads to overheating. Check the timing gear cover gaskets for weeping oil, a frequent leak point on this engine family.
Overhaul & Rebuild Points
Plan major overhauls around the 10,000-hour mark or when compression drops below specification. Inspect piston rings, cylinder liners, and valve seats for wear. Replace the turbocharger if shaft play exceeds limits or if blade damage is evident. Rebuild the fuel injection pump if black smoke persists after filter changes. Inspect the crankshaft main and rod bearings for scoring during any major service.
Seasonal & Environment Servicing
In cold climates, use low-temperature grade Komatsu Genuine Lubricants and ensure the coolant mixture meets the required freeze protection. In dusty environments, check the air filter restriction indicator more frequently and clean the radiator and oil cooler fins daily to prevent overheating. In high-humidity areas, monitor the fuel water separator closely to prevent microbial growth and injector corrosion.
SAA4D102E-2E-4(S/N 26274903-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 6732-71-6111 | Filter, Fuel - Secondary | Fuel system service | Check fitment → |
| 6162-53-5430 | Packing,Oil Filter And Piping | Lubrication service | Check fitment → |
| 6162-53-5450 | Packing,Oil Filter And Piping | Lubrication service | Check fitment → |
| 6731-51-5290 | O-Ring,Oil Filter And Piping | Lubrication service | Check fitment → |
| 6732-21-5530 | Cartridge, Engine Oil Filter | Lubrication service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
SAA4D102E-2E-4(S/N 26274903-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine crankshaft speed sensor failure | Broken sensor, wiring issue, or connector corrosion | Replace the speed sensor and verify the voltage at the pin connector |
| CA111 | Internal engine controller fault | ECM hardware failure | Replace or reprogram the ECM |
| CA451 | Common rail pressure sensor feedback value too high | Malfunction in the rail sensor or actual overpressure condition | Diagnose the fuel rail pressure sensor or pump lines |
| CA441 | Battery voltage too low | Weak battery or charging system issue | Replace the battery or alternator; check the voltage regulator |
| CA442 | Battery voltage too high | Alternator overcharging or regulator failure | Replace the alternator or battery; check the voltage regulator |
| CA122 | Intake air pressure high voltage | Sensor malfunction or wiring issue | Verify the intake pressure sensor and wiring |
| CA123 | Intake air pressure low voltage | Sensor short or airflow restriction | Check for a sensor short or an airflow restriction |
| CA153 | Intake air temperature sensor high voltage | Sensor malfunction | Replace or test the IAT sensor |
| CA154 | Intake air temperature sensor low voltage | Sensor malfunction | Replace or test the IAT sensor |
| CA234 | Engine overspeed | Throttle calibration error, engine load cycle issue, or operator misuse | Verify throttle calibration, engine load cycle, or operator misuse |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
SAA4D102E-2E-4(S/N 26274903-UP) attachments & work tools
Excavator Attachments
The SAA4D102E-2E-4 engine is fitted to PC120-6 and PC130-6 series excavators. Typical bucket sizes for this class range from 0.5 m³ (0.65 yd³) for standard digging applications. Factory configurations include one-piece booms and arms sized for 2500 mm (11'10") reach. Implement circuit pressure is rated at 325 kg/cm² (4,620 PSI).
Coupler/Mounting Systems
Specific coupler or quick-attach mounting system details are not documented in the provided source text for this exact serial range. Verify with your dealer for specific bucket pin configurations and hydraulic hose routing for the PC120-6/PC130-6 models.
Hydraulic Kit/Arrangement Notes
The PC120-6/PC130-6 series utilizes a multi-valve hydraulic arrangement. First valve flow is 226 ltr./min (59.7 gpm). Second and third valve flows are each 113 ltr./min (29.9 gpm). These flows support standard auxiliary tool circuits for this engine class.
Factory Configurations/Guarding
The PC120-6/PC130-6 operating weight includes a 4600 mm (15'1") one-piece boom. Engine specifications for the SAA4D102E-2E-4 indicate a power output of 80 HP at 2200 RPM for industrial applications, though excavator variants may vary by configuration/series. Fluid recommendations include Komatsu EO engine oil and Komatsu hydraulic oil.
All SAA4D102E-2E-4(S/N 26274903-UP) assemblies by section
Every catalogued assembly group for the Komatsu SAA4D102E-2E-4(S/N 26274903-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Engine
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Air Cleaner(#26304081-)
| 60***30 | Plate? Instruction,Count Sticker For Air Cleaner | 1 |
| 60***40 | Cover Ass'Y | 1 |
| 60***50 | Valve,Vacuator | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Air Connector(#26304081-)
| 07***08 | Plug,(Without Lock-Up), Plug | 1 |
| 62***10 | Screw | 4 |
| 66***30 | Spacer (10mm) | 4 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Air Intake Cover(#26277757-)
| 67***10 | Plug, Pipe (1/2-14 Npt) | 2 |
| 67***60 | Bolt, Mounting (M8x1.25x25) | 6 |
| 67***30 | Cover, Intake Manifold | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Air Intake Heater(#26277757-)
| 67***11 | Gasket,Air Intake Heater | 1 |
| 67***20 | Heater, Engine | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Alternator (35a) (Inner Parts)(#26304081-26315327)
| 60***10 | Alternator A. (35a),(See Fig.A601p-02a1) | 1 |
| ND***10 | Cover,Rear | 1 |
| ND***30 | Collar,Stud | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Alternator (35a)(#26304081-)
| (6***0) | Alternator A. (35a),(See Fig.A601p-02b0a) | 1 |
| (6***0) | Alternator A. (35a),(See Fig.A601p-02b0z) | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Alternator (60a) (Inner Parts)(#26304081-)
| 60***20 | Alternator Assembly | 1 |
| ND***80 | Screw | 4 |
| ND***30 | Collar,Stud | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Alternator (60a)(#26304081-)
| (6***0) | Alternator A. (60a),(See Fig.A601p-02b1z) | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Alternator Mounting(#26304081-)
| 01***95 | Bolt (M10-1.50x95) | 1 |
| 01***16 | Washer,(With Shoe Slip Control) | 1 |
| 67***60 | Bolt, Mounting (M8-1.25x25) | 3 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Belt Tensioner (For 35a Alternator)(#26304081-)
| 67***90 | Plate | 1 |
| 67***20 | Bolt (M10x1.50x70) | 1 |
| 67***20 | Capscrew, Flat Head (M8-1.25x25) | 2 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Belt Tensioner (For 60a Alternator)(#26304081-)
| 67***20 | Bolt (M10x1.50x70) | 1 |
| 67***20 | Capscrew, Flat Head (M8-1.25x25) | 2 |
| 67***40 | Belt,Alternator And Water Pump | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Boost Tube(#26304081-)
| 67***50 | Elbow, Male Adapter (1/8 Npt) | 1 |
| 67***10 | Bushing, Reducing Pipe | 1 |
| 67***20 | Tube | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Breather Hose(#26304081-)
| 07***20 | Clamp, Spring Hose | 1 |
| 07***80 | Hose | 1 |
| 67***40 | Clip | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Camfollower Cover(#26277757-)
| 01***16 | Bolt, Mounting Transmission Control Switch | 4 |
| 01***10 | Washer,(For 35a Alternator) | 4 |
| 67***50 | Washer, Plain (3/8 Inch) | 4 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Camshaft(#26277757-)
| 67***11 | Camshaft | 1 |
| 67***20 | Support, Camshaft Thrust | 1 |
| 67***31 | Gear, Camshaft | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Caution Plate (For Regulation Of Epa)(#26293515-)
| 67***90 | Decal | 1 |
| 67***91 | Decal | 1 |
| 67***70 | Plate | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Cooling Fan(#26304081-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 4 |
| 60***50 | Fan,Cooling | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Crank Pulley(#26304081-)
| 61***60 | Boss | 4 |
| 67***10 | Pulley, Crankshaft | 1 |
| 67***20 | Bolt (M12x1.25x36) | 4 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Crankshaft(#26277757-)
| 67***20 | Crankshaft Ass'Y | 1 |
| 67***50 | Gear, Crankshaft | 1 |
| 67***11 | Gear, Crankshaft | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Cylinder Block Blind Cover(#26304081-)
| 67***20 | Bolt, Flange (M8-1.25x20) | 2 |
| 67***11 | Gasket, Cover Plate | 1 |
| 67***11 | Plate, Cover | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Cylinder Block Blind Plug(#26304081-)
| 67***60 | Plug, Expansion (Not Used With Side Oil Fill) | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Cylinder Block Gasket Kit(#26304081-)
| 07***10 | O-Ring,(F4320-67a0 -4 ) | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 7 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 2 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Cylinder Block(#26277757-)
| 62***10 | Screw | 2 |
| 62***10 | Seal, O-Ring (M10-1.00) | 4 |
| 67***30 | Block Assembly, Cylinder | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Cylinder Head Gasket Kit(#26304081-)
| 07***15 | Gasket,(Hd325?Pc750?800?1800) (A5010) | 2 |
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 2 |
| 07***12 | Gasket,Injection Pump Piping | 4 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Cylinder Head(#26277757-)
| 67***10 | Retainer, Exhaust Valve Spring | 8 |
| 67***11 | Retainer, Valve Spring | 8 |
| 67***10 | Head Ass'Y | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Exhaust Connector Clamp
| 67***20 | Clamp,Turbocharger Outlet Pipe | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Exhaust Manifold(#26300902-)
| 07***08 | Plug,(Without Auto Priming System) | 1 |
| 67***30 | Manifold,Exhaust | 1 |
| 67***50 | Bolt | 8 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Fan Drive Pulley(#26304081-)
| 67***20 | Support Ass'Y | 1 |
| 67***70 | Bolt, Mounting (M8-1.25x40) | 4 |
| 67***10 | Hub, Fan | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Fan Pilot Spacer
| 01***35 | Bolt, Mount Bracket To Floor | 4 |
| 67***10 | Spacer | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Fan Pulley(#26282900-)
| 67***10 | Pulley | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Fluid Level Sensor(#26304081-)
| 04***10 | Clip - Fuel Sensor Harness | 1 |
| 08***10 | Bracket, Bucket Position Sensor | 1 |
| 42***50 | Bracket | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Flywheel Housing
| 02***13 | Plug | 1 |
| 61***90 | Spacer | 1 |
| 63***30 | Plate | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Flywheel(#26304081-)
| 67***20 | Washer, Plain (M12) | 8 |
| 67***30 | Bolt (M12x1.25x32) | 8 |
| 67***80 | Gear, Flywheel Ring | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Front Cover
| 67***40 | Pin, Timing | 1 |
| 67***50 | Ring, Retaining | 1 |
| 67***60 | Screw, Round Head (M5-0.80x17) | 2 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Front Cover Pointer
| 61***61 | Spacer | 2 |
| 67***60 | Bolt, Mounting (M8-1.25x25) | 1 |
| 67***30 | Bolt (M8x1.25x60) | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Front Gear Train Cover
| 07***10 | O-Ring,(F4320-67a0 -4 ) | 1 |
| 67***30 | Cover | 1 |
| 67***30 | Bolt, Flange Head (M12-1.75x25) | 2 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Fuel Filter Piping(#26304081-)
| 07***12 | Gasket,Injection Pump Piping | 4 |
| 61***10 | Connector, Banjo | 1 |
| 61***80 | Spacer | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Fuel Injection Pump (Feed Pump) (Inner Parts)(#26304081-)
| DK***20 | Bolt, Joint | 1 |
| DK***60 | Feed Pump Ass'Y | 1 |
| DK***00 | Valve,Check | 2 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Fuel Injection Pump (Governor) (1/3) (Inner Parts)(#26304081-)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Bolt | 1 |
| DK***40 | Gasket | 2 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Fuel Injection Pump (Governor) (2/3) (Inner Parts)(#26304081-)
| DK***40 | Gasket,Air Compressor | 2 |
| DK***10 | Gasket | 2 |
| DK***00 | Cover | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Fuel Injection Pump (Governor) (3/3) (Inner Parts)(#26304081-)
| DK***00 | Gasket | 1 |
| DK***00 | Cover | 1 |
| DK***00 | Nut,Cap | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Inner Parts)(#26304081-)
| 67***10 | Injection Pump Ass'Y | 1 |
| DK***30 | Bearing | 0 |
| DK***20 | Housing | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Fuel Injection Pump (Pump) (2/2) (Inner Parts)(#26304081-)
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
| DK***00 | Sleeve,Control | 4 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Fuel Injection Pump Mounting(#26304081-)
| 01***14 | Bolt - Fuel Sensor Mounting | 2 |
| 01***11 | Nut (M14-1.50 Thd), Nut; Was 01582-01411 | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Fuel Injection Pump(#26304081-)
| (6***0) | Injection Pump Ass'Y,(See Fig.A401p-02h1) | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Fuel Inlet And Outlet Joint Cap(#26277757-)
| 67***40 | Cap,(For Shipping) | 2 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Fuel Joint(#26277757-)
| 61***50 | Connector, Banjo | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Fuel Piping(#26304081-)
| 01***16 | Bolt | 1 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 1 |
| 04***08 | Clip | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Head Cover(#26304081-)
| 07***09 | Clamp,(See Fig. K0210-16a0) | 2 |
| 61***10 | Cap, Oil Filler | 1 |
| 61***30 | Tube, Oil Filler | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Heat Shield(#26304081-)
| 01***30 | Stud | 2 |
| 01***16 | Bolt, Mount Solenoid Valve | 7 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Heater Switch
| 60***70 | Switch,Air Intake Heater | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Injection Nozzle(#26304081-)
| 67***50 | Seal, Rectangular Ring | 1 |
| 67***60 | Gasket,Injector - Spill | 2 |
| 67***10 | Shim 1.00 mm Thick | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Muffler And Mounting(#26300902-)
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 4 |
| 01***35 | Bolt,R.H. (For Add. Air Compressor) | 2 |
| 01***06 | Nut | 4 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Oil Cooler Cover(#26304081-)
| 67***50 | Elbow | 1 |
| 67***90 | O-Ring,Oil Filter And Piping | 2 |
| 67***20 | O-Ring,Oil Pressure Plug | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Oil Filter And Piping(#26304081-)
| 07***08 | Plug | 1 |
| 60***70 | Spring, Compression | 1 |
| 61***20 | Cap | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Oil Filter Bracket(#26304081-)
| 01***95 | Bolt,(For Shipping) | 1 |
| 61***20 | Spacer,(For Shipping) | 1 |
| 67***50 | Bracket,(For Shipping) | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Oil Level Gauge(#26304081-)
| 04***08 | Clip | 2 |
| 67***20 | Bolt, Mounting (M8-1.25x16) | 2 |
| 67***90 | Guide | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Oil Pan And Suction Tube(#26304081-)
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 2 |
| 09***50 | Liquid Gasket, Lg-7, 150g | 0 |
| 62***80 | Plug,Drain | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Oil Pan Bolt(#26277757-)
| 67***10 | Bolt, Mounting (M8-1.25 X 25) | 28 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Oil Pressure Switch(#26304081-)
| 08***05 | Switch,Engine Oil Pressure | 1 |
| 62***10 | Seal, O-Ring (M10-1.00) | 1 |
| 67***70 | Adapter, Reducing | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Oil Pump(#26277757-)
| 67***12 | Pump, Lubricating Oil | 1 |
| 67***20 | Bolt (M8x1.25x30) | 4 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Piston
| 67***10 | Pin, Piston | 4 |
| 67***20 | Ring, Retaining | 8 |
| 67***01 | Engine Connecting Rod Assembly | 4 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Rear Hanger(#26304081-)
| 67***20 | Bolt (M12x1.75x30) | 2 |
| 67***10 | Bracket, Lifting | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Repair Parts (1/4) (Cylinder Head)(#26277757-)
| 67***51 | Gasket, Cylinder Head | 1 |
| 67***51 | Gasket, Cylinder Head | 1 |
| 67***10 | Guide, Valve Stem - Intake/Exhaust (Thin Wall) | 8 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Repair Parts (2/4) (Cylinder Block)(#26277757-)
| 67***10 | Bushing, Oversize (No. 1 Bore) | 1 |
| 67***20 | Bushing, Oversize (No. 2-5 Bore) | 1 |
| 67***10 | Sleeve, Salvage - Std Bore | 4 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Repair Parts (3/4) (Crankshaft)(#26277757-)
| 67***00 | Main Metal Ass'Y | 4 |
| 67***00 | Main Metal Ass'Y | 4 |
| 67***00 | Main Metal Ass'Y | 4 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Repair Parts (4/4) (Piston)(#26277757-)
| 67***00 | Bearing, Connecting Rod (1.00mm Oversize) | 8 |
| 67***00 | Bearing, Connecting Rod (0.75mm Oversize) | 8 |
| 67***00 | Bearing, Connecting Rod (0.50mm Oversize) | 8 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Revolution Sensor(#26300902-)
| 01***20 | Bolt - Mount Risers To Cab Floor | 1 |
| 04***12 | Clip | 1 |
| 08***12 | Clip | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Rocker Arm(#26277757-)
| 67***70 | Screw, Slotted Set (3/8-24x1 1/2 Inch) | 2 |
| 67***40 | Bolt | 4 |
| 67***11 | Rod, Push | 8 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Spare Parts(#26304081-)
| 67***81 | Gasket, Valve Cover | 4 |
| 67***10 | Gasket,Camfollower Cover Bolt | 4 |
| 67***11 | Filter, Fuel - Secondary | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Starting Motor (4.5kw) (With Protect Cover) (Inner Parts)(#26302312-)
| 60***10 | Starting Motor W/Jump Start Protection | 1 |
| ND***82 | Yoke Assembly | 1 |
| ND***00 | Washer, Felt | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Starting Motor (4.5kw) (With Protect Cover)(#26302312-)
| (6***0) | Starting Motor Ass'Y,(4.5kw) (See Fig.A621p-02a4) | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Starting Motor Mounting (4.5kw)
| 01***35 | Bolt, Mount Bracket To Floor | 2 |
| 67***11 | Gasket,Starter | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Switch (For Starter)(#26282900-)
| 60***40 | Switch,Safety Relay | 1 |
| 60***41 | Switch,Safety Relay | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Tachometer Drive Cover(#26277757-)
| 67***90 | Cover, Mechanical Tach Drive | 1 |
| 67***20 | Seal, Rectangular Ring | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Tappet(#26277757-)
| 67***12 | Tappet, Valve | 8 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Thermostat Housing(#26304081-)
| 07***25 | Clip,(For Slag Handling) | 2 |
| 67***40 | Bolt, (M8x1.25x35) | 1 |
| 67***71 | Coupling | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Thermostat(#26295864-)
| 67***71 | Thermostat | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Turbocharger Mounting(#26300902-)
| 01***25 | Stud | 4 |
| 07***15 | Gasket,(Hd325?Pc750?800?1800) (A5010) | 2 |
| 62***50 | Nut | 4 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Turbocharger Oil Piping(#26300902-)
| 01***10 | Washer,(For 35a Alternator) | 1 |
| 07***15 | Gasket,(Hd325?Pc750?800?1800) (A5010) | 2 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 2 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Under Plate(#26277757-)
| 67***50 | Plate, Cylinder Block Stiffener | 1 |
| (0***0) | Liquid Gasket, Lg-7, 150g | 0 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Water Connector Plug(#26277757-)
| 67***10 | Plug, Pipe (1/2-14 Npt) | 2 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Water Connector(#26300902-)
| 67***60 | Connection, Water Inlet | 1 |
| 67***20 | Bolt (M10-1.50x75) | 3 |
| 67***30 | Seal,Water Inlet Connection | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Water Pump(#26277757-)
| 67***01 | Water Pump Ass'Y | 1 |
| 67***02 | Water Pump Ass'Y | 1 |
| 67***01 | Kit, Water Pump | 1 |
Komatsu : Saa4d102e-2e-4(S/N 26274903-Up) : Engine : Water Temperature Sensor(#26304081-)
| 08***10 | Bracket, Bucket Position Sensor | 1 |
| 56***12 | Adapter,Water Temperature Gauge | 1 |
| 78***20 | Sensor, Water Temperature | 1 |
SAA4D102E-2E-4(S/N 26274903-UP) serial number reference
The engine serial number plate is stamped on the engine block, typically on the left side near the injection pump. The prefix is the alphanumeric code identifying the engine model (e.g., SAA4D102E-2E-4), while the subsequent digits are the unique build serial. Verify the prefix against the catalog range for your specific serial number.
| Prefix | Identifies | Notes |
|---|---|---|
| SAA4D102E-2E-4 | Engine Model | Komatsu SAA4D102E-2E-4 engine family. Serial range S/N 26274903-UP. Source: published references catalog listing for SAA4D102E-2E-4. No other 3-character PIN prefixes are documented for this specific engine serial range in the provided sources. Other variants (2A-4, 2B-4, 2C-4, 2G-4) are listed as separate catalog entries or distinct engine models and are not tied to the 26274903-UP range in the source text. |
Frequently asked questions
What is the engine designation for this machine?
Komatsu SAA4D102E-2E-4
What is the operating weight of the machine?
Varies by configuration/series
What engine replaced the SAA4D102E-2E-4?
SAA4D102E-2G-4
What SAA4D102E-2E-4(S/N 26274903-UP) owners discuss
What are the known powertrain and hydraulic behaviors for the Komatsu SAA4D102E-2E-4 engine series?
The SAA4D102E-2 series is a four-cylinder, turbocharged, air-to-air intercooled diesel engine. It is commonly paired with Komatsu’s Smart Hydraulic System, which uses load-sensing technology to match pump flow to operator demand. This configuration provides smooth control and high fuel efficiency. The engine typically delivers 80 hp at 2200 rpm in industrial applications, though output varies by machine configuration and series. The hydraulic system is designed to be fuel-efficient and smooth to operate, contrasting with earlier generations that were noted for being jerky or less efficient. The line is engineered so that major components like the hydraulic pump and engine wear out in tandem, which can impact resale value if maintenance is neglected. Variations in hydraulic flow and pressure exist depending on the specific machine model and serial range. Have your dealer verify the exact hydraulic circuit specifications for your serial number prefix.
What undercarriage or wear patterns are typical for machines using this engine?
Machines equipped with the SAA4D102E-2 series, such as the PC120-6 and PC100-6 excavators, are subject to standard heavy-duty undercarriage wear. Common issues include track loosening, which requires regular tension checks, and wear on rollers and track chains. The hydraulic system is a critical wear point; if the main pump fails, the engine is often near the end of its service life due to the design philosophy of simultaneous wear. Operators should monitor for hydraulic leaks and check the condition of the final drives, as grinding noises from travel motors can indicate internal wear. Undercarriage life is heavily influenced by the operating environment, including dust exposure and ground conditions. Have your dealer verify the undercarriage wear limits and final drive oil levels.
What are the common engine quirks or maintenance requirements for the SAA4D102E-2 series?
The SAA4D102E-2 engine is robust but sensitive to contamination. Extended service intervals or low-quality fuel can accelerate wear on fuel delivery components and injectors. Airflow restrictions from dirty air filters or clogged charge-air coolers are common causes of power loss under load. The cooling system requires regular inspection of the radiator, hydraulic oil cooler, and charge-air cooler spaces, as debris packed between heat exchangers can cause overheating during heavy work. Engine performance issues, such as loss of power or increased fuel usage, often signal airflow restriction or injector wear rather than major internal failure. The engine is designed for durability but requires strict adherence to Komatsu’s maintenance program for hydraulic oil and engine fluids to prevent premature wear. Have your dealer verify the coolant level and fan operation.
What are the common electrical or sensor issues associated with this engine and machine type?
Komatsu excavators rely heavily on electronic control systems, meaning a single faulty sensor or unstable power supply can trigger multiple warning signals. Owners often report intermittent starting, dashboard failures, or machines that randomly shut down. These issues are frequently linked to battery state, engine and chassis grounds, or main starter cable integrity. A battery may show acceptable voltage until the starter is loaded, so load testing is recommended before replacing components. Multiple fault codes often point to battery, ground, or connector issues rather than individual sensor failures. The engine control system monitors hydraulic pressure and engine speed together, so electrical faults can mimic hydraulic weaknesses. Have your dealer verify the battery load test and main ground connections.
What should be checked when buying a used machine with the SAA4D102E-2E-4 engine?
When purchasing a used machine with this engine, verify the exact serial number prefix to ensure compatibility with the correct service manual and parts. Check the hydraulic system for weakness when hot, as internal leakage in pumps, valves, or cylinders becomes more noticeable at operating temperature. Test all hydraulic functions (boom, arm, bucket, swing, travel) both cold and hot to identify performance drops. Inspect the cooling package for debris packed between heat exchangers. Check for signs of recent fuel system maintenance, as machines that stopped starting after filter changes may have air in the fuel supply. Verify the condition of the undercarriage and final drives, as grinding noises or track loosening are common. Ensure the engine starts reliably and does not lose power under load. Have your dealer verify the engine compression and hydraulic pressure specifications.
How does the SAA4D102E-2E-4 engine compare to related variants in terms of configuration?
The SAA4D102E-2E-4 is a specific variant within the SAA4D102E-2 series, distinguished by its suffix code which indicates a specific application or market configuration. While the core engine architecture (four-cylinder, turbocharged, intercooled) remains consistent across the SAA4D102E-2 family, the exact power output, emissions tier, and hydraulic integration can vary by configuration and series. Sources indicate that the SAA4D102E-2 series is used in various Komatsu excavators, including the PC120-6 and PC100-6, with operating weights and hydraulic capacities varying by model. The specific serial number range (26274903-UP) suggests a later production build within this series, which may have updated components or service procedures compared to earlier builds. Always confirm the exact engine model and serial range against the machine’s identification plate. Have your dealer verify the engine CPL (Critical Parts List) number.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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