Komatsu 6156-81-8150 turbocharger replacement for WA480 loader SAA6D125E-3. VSR balanced, K18 Inconel turbine wheel. Workshop and fleet supply ready
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High-performance S400 turbocharger for Komatsu SAA6D125E-3 engines.
Features a K18 Inconel turbine wheel (withstands temperatures above 750°C) and upgraded 360° bronze thrust bearings to prevent lag.
OEM: 6156-81-8150 | Cross-reference: 319460, 319448, 6156-82-8150. Fits WA480-5 loaders and PC400-7 excavators.
Workshop and fleet supply ready.
The Komatsu SAA6D125E-3 engine is a highly respected 11.0L inline-6 industrial workhorse (11,045 cc) engineered to deliver robust torque outputs in WA480-5/WA480-6 wheel loaders, PC400-7/PC400-8 hydraulic excavators, and heavy-duty dump trucks. At the core of its exhaust energy extraction is the precision-engineered Komatsu SAA6D125E-3 turbocharger (OEM 6156-81-8150, cross-reference 319460, 319448, 6156-81-8170), an S400 turbocharger system built to operate under severe, high-pressure duty cycles. This heavy-duty Komatsu S400 turbo features an advanced turbine wheel cast from high-temperature K18 Inconel alloy to withstand continuous exhaust temperatures exceeding 750°C without core distortion. In demanding mining and earthmoving sites, typical turbocharger failure modes—such as thrust bearing scoring from oil starvation and turbine creep—can cause engine lag or black smoke. Our replacement assemblies resolve these failure risks by integrating an upgraded 360-degree copper-alloy thrust bearing and step-gap piston ring seals. Meticulously Vibration Sorting Rig (VSR) balanced at speeds up to 150,000 RPM, this premium WA480 turbocharger and PC400 turbocharger replacement guarantees immediate boost response and exceptional operational life.
| Parameter | Value |
|---|---|
| Engine Code | Komatsu SAA6D125E-3 (11.045L) |
| Configuration | Inline-6, 24 Valves SOHC |
| Turbocharger Model | S400 Heavy Duty |
| Turbine Wheel Metallurgy | K18 Inconel Alloy (750°C+ rated) |
| Casing Metallurgy | Silicon-Molybdenum Ductile Cast Iron |
| Thrust Bearing Design | Upgraded 360° Solid Bronze |
| Balancing Specification | VSR Balanced (Up to 150,000 RPM) |
| Primary OEM Number | 6156-81-8150 |
| Interchange References | 319460, 319448, 6156-81-8170, 6156-82-8150 |
Our Komatsu turbine and turbo catalog covers the full medium and heavy-duty V8 and inline-6 families, from the S6D95 and SAA6D102 up to the high-output S6D140 and SAA6D170 lines. Explore our complete range of Komatsu turbocharger assemblies and components by visiting our Komatsu Brand Hub or browse other specialized brands in our main Komatsu Turbo Category.
6156-81-8150, Construction Machinery Engine Spares, S400 Turbo, SAA6D125E-3, WA480 Loader Turbo
| Model | Primary Part Number | Cross Ref Part Numbers | Compatible Engine Model | Compatible Vehicle Model |
|---|---|---|---|---|
| TA3103 | 465636-14 | 465636-5207S, 6207-81-8130, 465636-0207 | S6D95L | PC150-3 WA150 |
| TD04-27W | 4900562 | 4900435, 49377-01600 | 4D102 | !!ALARM_MISSING_MACHINE!! |
| S400 | 6156-81-8150 | 319460, 319448, 6156-818150 | SAA6D125E-3 | WA480 |
| S400 | 6156-81-8170 | 6156-81-8130, 318714, 323949 | SAA6D125E-3K | RS400-7 Industrial Fan |
| T04B59 | 465044-0261 | 6137-82-8200, 465044-5261S, 6137828600 | S6D105 | PC200-3 WA250 WA300 |
| T04B59 | 465044-0251 | 6207-81-8210, 465044-0051, 6207818210 | S6D95L | PC220-5 |
| TA3137 | 700836-0001 | 6207-81-8331, 6209-81-8311, 6207819330 | S6D95L | PC200-6 |
| KTR110-2 | 6505-65-5030 | 6505-61-5030, 6505655030, 6505655091 | SAA6D140E-3N-8 | PC750-6 PC800-7 |
| KTR110-3 | 6505-52-5510 | 6505525510, 6505525510R | S6D170-1 | GENSET S6D170 |
| KTR110 | 6505-55-5090 | 6505555090, R6505555090, 6505-51-7830 | SAA6D140E-2A | HD325-6 Dump Truck |
| H1C | 3522778 | 3525648, 3522777, 3802289, J919121 | 6BTA-590 | Industrial Tractor |
| HX35 | 3595157 | 3596668, 4038475, 6738-81-8090, 6738828220 | 6BTAA | PC200 WA200-250 |
| HX35 | 4037469 | 4955155, 6754-82-8010, 2835695 | SAA6D107E-1 | PC200-8 |
| HX35W | 6754-81-8240 | 4043679, 4955479, 6754818240 | SAA6D107E | GD555-5 WA380-8 |
| HX35 | 3539697 | 6735-81-8201, 3537132, 3539698 | S6D102 | PC220 CD60R |
| HX82 | 3594190 | 5323959, 3592520, 4025026 | QST30 | Generator |
| T04E15 | 466670-0013 | 466670-5013S, 6222-83-8171 | SA6D108 | PC300-6 |
| TO4E08 | 466670-0001 | 6222-83-8170, 6222-81-8210 | S6D95L | PC300-5EXX |
| TD04L | 49377-01700 | 6271-81-8100, 49377-01740, 49377-01770 | SAA4D95LE-5 | PC120-8 PC138US-8 |
| TA3103 | 465636-0206 | 6205-82-8100, 465636-5216S, 6205818120 | S4D95L | PC100 PC120 PC100-5 |
| KTR90 | 6506-21-5010 | 6506215910, 6506-215-910, 6156-81-8150 | KTR90332E | PC400-8 PC450-8 |
| HX25-1W | 4038790 | 3599355, 4089714, 4033351H | SAA4D95LE | PC100/200/128US |
| D155 | 6502-13-2003 | 6502132003, 319319 | S6D155-4-R | D150A EG300 |
| D355 | 6502-12-9004 | 6502-12-9005, 319032, 6502129003 | 4A-S6D155 | D355 Excavator |
| HX30-2W | 3592015 | 3802906, 3537033, 6732-81-8900 | 4BT | Truck Elite Industrial |
| HX30-3 | 6732-81-8100 | 6732-81-8101, 3802749, 3539803 | 4BT-110 | PC100-6 |
| KTR130-3 | 6502-51-5040 | 6502-51-5030, 6240611105 | SAA6D170-E6 | D375-A6 WA600-6 |
| KTR110 | 6505-71-5520 | 6505-71-5040, 6505-68-5540 | SAA6D140E-5H | !!ALARM_MISSING_MACHINE!! |
| TA4532 | 6151-83-8110 | 465105-5010S, 465105-0010 | S6D125 | PC400 PC400-5C |
| TO4B59 | 465044-0225 | 6138-81-8101, 465044-0025 | S6D105 | D66S-1 Offway |
| HX35W | 6738-81-8190 | 6738-81-8191 | S6D102 | PC220-7 |
| TBP417 | 466535-2 | 6222-81-8310, 447450-0082 | SA6D108-1G | WA420-3 |
| HX40W | 4038421 | 4038422, 3538856, 6743-81-8040 | S6D114 | PC300-7 |
| TO4E08 | 466704-0213 | 5222-81-8210, 6151-81-8500 | S6D125 | D85 D65EX-12E |
| S500 | 319179 | 6240-81-8600, 318349, 6240-81-8500 | SAA6D170E | H0465 WA700 |
| KTR110A-1K | 6505116210 | 6505-11-6210, 6505-11-5106 | S6D155 | D155 Excavator |
| HX83 | 4046244 | 4955653, 3798613, 6241-82-8200 | QSK35 | EX1200-6 |
| HX40 | 4038424 | 4038429, 4089965, 3575169 | 6CTA | D61 Bulldozer |
| TO4B59 | 465044-5257S | 465044-0255, 6138-82-8400, 465044-0039 | SA6D110-1A | WA350-1 WA400 EG150-3 |
| HX35W | 4038597 | 4955156, 4042667, 4038209 | QSB Tier-3 | PC200-8 Grader |
Komatsu turbochargers fit heavy machinery including Komatsu PC400-7 Excavator, Komatsu PC450-7 Excavator, Komatsu WA480-5 Loader, and Komatsu WA470-5 Loader.
Contact us for complete application coverage.
| Make | Machine / Vehicle Model | Year Range | Engine Code | Turbo OEM |
|---|---|---|---|---|
| Komatsu | PC400-7 / PC400-8 Excavator | 2003–2015 | SAA6D125E-3 | 6156-81-8150 |
| Komatsu | PC450-7 / PC450-8 Excavator | 2004–2015 | SAA6D125E-3 | 6156-81-8150 |
| Komatsu | WA480-5 / WA480-6 Loader | 2003–2014 | SAA6D125E-3 | 6156-81-8150 |
| Komatsu | WA470-5 / WA470-6 Loader | 2003–2014 | SAA6D125E-3 | 6156-81-8150 |
Symptom: Whistling noises from the engine bay, oil accumulation in the compressor housing, and noticeable radial shaft play.
Diagnosis: Hot shut-downs or blocked oil drains carbonize engine oil in the bearing housing, restricting oil supply. This starvation degrades the copper thrust bearing, causing the compressor wheel to rub against its casing.
Solution: Replace the turbocharger with a balanced S400 unit featuring 360° bronze bearings, flush the oil lines, and allow the engine to idle for 2 minutes before shut-down.
Symptom: Rapid drop in boost pressure, black smoke emissions, or direct physical flange mismatch during assembly.
Diagnosis: SAA6D125E-3 and SAA6D125E-5 platforms are from different emission tiers, utilizing different exhaust flange designs and wastegate actuator calibration.
Solution: They are not interchangeable. Always confirm the exact part number (e.g., 6156-81-8150) to match your engine block block serial number.
Symptom: High-pitched squealing, immediate oil seal leak, or shaft seizure within the first few minutes of startup.
Diagnosis: Starting a newly installed turbocharger without pre-lubrication causes immediate metal-to-metal friction on the bronze journal bearings.
Solution: Fill the oil feed port with clean engine oil and spin the compressor wheel manually before connecting the lines. Replace the old oil supply line and crank the engine without starting to build initial oil pressure.
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Need a reliable S400 turbo for your WA480 or PC400? Our VSR-balanced units with K18 Inconel wheels are ready for immediate dispatch. Contact us for competitive pricing.
For Turbocharger: Cartridge, CHRA, repair kits available. Part number required for final confirmation.
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