OEM 6150-41-1012 camshaft for Komatsu S6D125 11.0L engines. Chilled cast iron, HRC 52-58 lobes. Fits PC400-5, D85P-21, WA470-3. Trade pricing on request
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Heavy-duty chilled cast iron camshaft for Komatsu S6D125 and SA6D125 engines.
Engineered with deep induction hardened lobes (HRC 52-58) to solve premature lobe wear and timing gear failure under extreme mining stresses.
OEM: 6150-41-1012 | Cross-reference: 6151-41-1010, 6150-41-1011. Fits Komatsu PC400-5 excavators and D85P-21 bulldozers.
Trade pricing on request.
The Komatsu S6D125 engine series represents a massive 11.0L inline-6 heavy-duty diesel platform (11,045 cc) designed to drive mining excavators, large loaders, and heavy bulldozers under continuous, grueling duty cycles. At the mechanical core of this SOHC overhead-valve (OHV) pushrod system is the precision-engineered Komatsu S6D125 camshaft (OEM 6150-41-1012, cross-reference 6151-41-1010, 6150-41-1011, 6150411012), which regulates critical valve timing and duration. In heavy mining operations, extreme valve spring pressures can cause destructive wear, commonly leading to premature camshaft lobe wear (spalling), timing gear failure, and oil film shear. To resolve these failures and eliminate timing lag, each chilled cast iron camshaft and SA6D125E camshaft replacement is cast from premium gray iron and finished with CNC precision. This specialised metallurgy ensures that our camshafts are exceptionally resistant to high-load thermal stress. It is a vital component for major overhauls, serving as a dependable PC400 camshaft, D85P camshaft, and WA470 camshaft upgrade. Every shaft features induction-hardened lobes achieving an elite HRC 52-58 camshaft hardness, protecting Komatsu S6D125 engine parts from premature wear.
| Parameter | Value |
|---|---|
| Engine Code | Komatsu S6D125 / SA6D125 / SAA6D125E (11.045L) |
| Configuration | Inline-6 Cylinders, 12 Valves SOHC OHV |
| Engine Cylinder Bore | 125.0 mm |
| Valve Clearance (Cold) | Intake: 0.30 mm | Exhaust: 0.60 mm |
| Camshaft Thrust Play | 0.050 – 0.220 mm (Wear Limit: 0.30 mm) |
| Timing Gear Backlash | 0.030 – 0.120 mm |
| Material Spec | Premium Chilled Cast Iron (chilled cast iron camshaft) |
| Hardness Treatment | Induction Hardened Journals (HRC 52-58 camshaft) |
| Primary OEM Number | 6150-41-1012 |
| Interchange References | 6151-41-1010, 6150-41-1011, 6150411012 |
Our Komatsu engine components catalog covers the full light-duty and heavy-duty inline families, from the 2.8L 4D94E and 3.3L S4D95 to the massive 11.0L SAA6D125 and 15.2L S6D155 lines. Explore our complete range of Komatsu diesel engine parts by visiting our Komatsu Brand Hub or browse other specialized brands in our main Komatsu Camshaft Category.
6150-41-1012, D85P Engine Cam, Komatsu PC400-5 Parts, Komatsu S6D125 Camshaft, S6D125 Cam Shaft
| Primary Part Number | Cross Ref Part Numbers | Compatible Engine Model | Compatible Machine Model |
|---|---|---|---|
| 6115-21-2211 | 4D130 | D60A Dozer | |
| 6207-41-1111 | 6207-41-1110 | 6D95 | PC200-5 Excavator |
| 6735-41-1111 | 6735411111 | 6D102 | PC200-6 Excavator |
| 6137-41-1120 | 6137411120 | 6D108 | PC300-5 Excavator |
| 6127-41-1103 | 6127-41-1220 | 6D155 | D155A Bulldozer |
| 6210-41-1012 | 6D140 | PC600-7 Excavator | |
| 6150-41-1012 | 6150411012 | 6D125 | PC400-6 Excavator |
| 6745-41-1110 | 6D114 | PC300-7 Excavator | |
| 6222-21-2210 | 6D110 | PC220-3 Excavator | |
| 6754-41-1170 | 6D107 | PC200-8 Excavator | |
| 6137-41-1120 | 6137411120 | 6D105 | PC200-3 Excavator |
| YM129900-14580 | 129900-14580 | 4D94S | FD25 Forklift |
| 6144-41-1110 | S4D94 | PC60-7 Excavator | |
| 6205-41-1300 | 6205411300 | S4D95 | PC120-5 Excavator |
| 6732-41-1111 | 6732411111 | S4D102 / B3.3 | PC128UU Excavator |
| 6207-41-1111 | 6207411111 | S6D95 | PC200-5 Excavator |
| 6735-41-1111 | 6735411111 | S6D102 | PC220-6 Excavator |
| 6222-41-1110 | 6222411110 | S6D108 | PC300-6 Excavator |
| 6150-41-1012 | 6151-41-1010 | S6D125 | D85P Dozer |
| 6128-41-1101 | 6127-41-1102 | S6D155 | D355A Bulldozer |
| 6118-41-1110 | YM123900-14580 | 6D106 | PC130-6 Excavator |
Komatsu camshafts fit heavy machinery including Komatsu PC400-5 Excavator, Komatsu D85P-21 Bulldozer, Komatsu WA470-3 Wheel Loader, and Komatsu HD255-5 Dump Trucks.
Contact us for complete application coverage.
| Make | Machine / Vehicle Model | Year Range | Engine Code | Camshaft OEM |
|---|---|---|---|---|
| Komatsu | PC400-3 / PC400-5 / PC400LC-5 Excavator (PC400 camshaft) | 1991–1998 | S6D125 / SA6D125 | 6150-41-1012 |
| Komatsu | D85E-21 / D85P-21 Crawler Bulldozer (D85P camshaft) | 1988–1996 | S6D125-1 | 6150-41-1012 |
| Komatsu | WA470-3 / WA470-3-A Wheel Loader (WA470 camshaft) | 1994–2001 | SAA6D125E-3 | 6150-41-1012 |
| Komatsu | HD255-5 Heavy Dump Truck | 1995–2003 | S6D125-1 | 6150-41-1012 |
Symptom: Metallic ticking sounds from the valve cover, progressive engine timing lag, and a rapid drop in engine lift power under load. (camshaft lobe wear)
Diagnosis: Extreme valve spring pressures combined with degraded or contaminated lubricating oil break down the hydrodynamic film between the cam lobes and solid lifters. This causes direct metal-to-metal contact, resulting in progressive spalling and lobe flattening.
Solution: Replace the compromised camshaft with our chilled cast iron unit (HRC 52-58 lobes) and always install a new set of solid tappets/followers during overhaul.
Symptom: Misfiring, combustion gas backpressure, or valve-to-piston contact during reassembly. (S6D125 cam shaft)
Diagnosis: Naturally aspirated 6D125 and turbocharged S6D125 engines share identical block profiles, making the 6150-41-1012 casting physically compatible across both variants. (SA6D125E camshaft)
Solution: Yes, they are compatible. Always verify that you are using a premium, chilled cast iron camshaft rated for turbo applications to prevent premature timing wear.
Symptom: Loose timing gear connection, rattling sounds from the gear train, or sheared woodruff keys during high-vibration operations. (timing gear failure)
Diagnosis: The camshaft timing gear must be securely pressed and keyed onto the shaft flange to prevent timing slip under heavy load torsional vibrations.
Solution: We supply both bare camshafts and complete camshaft-and-driving-gear assemblies. If transferring your old gear, always inspect the keyway for cracks and use a hydraulic press to achieve a standard press-fit clearance.
Symptom: Engine sudden shutdown, complete loss of valve timing coordination, and severe internal valve train damage.
Diagnosis: The S6D125 (OEM 6150-41-1012) and SA6D125E-2 platforms share the same camshaft block layout, allowing direct replacement.
Solution: Yes, it direct-replaces SA6D125E-2 versions. Always verify the original part number before installation.
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