5I-8068 camshaft for Caterpillar S6K 6.4L engine. Fits 320B, E200B excavators. HRC 50-55 chilled cast iron resists lobe wear. Fleet supply and export
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The Caterpillar 5I-8068 camshaft is a precision-machined chilled cast iron component engineered for the S6K 6.4L diesel engine. Achieving a lobe hardness of HRC 50-55, it resolves valvetrain noise and fits Caterpillar E200B, 320, and 320B excavators. Fleet supply and export ready.
The Caterpillar S6K 6.4L engine is a robust industrial powerplant based on legendary Mitsubishi engineering, widely deployed in mid-sized earthmoving machinery. As the mechanical conductor of the engine’s breathing cycle, the Caterpillar S6K camshaft (OEM 5I-8068) is the critical component governing precise valve timing. Ruich Value supplies this high-standard valvetrain assembly to uphold Caterpillar’s rigid QDR (Quality, Durability, and Reliability) standards. Manufactured from premium chilled cast iron, our camshafts restore the original lift and duration profiles required for CAT 320 excavator camshaft applications and heavy-duty 320L logistics fleets.
Continuous operation in high-dust construction environments often leads to camshaft lobe wear and increased valve train noise. These issues are frequently caused by lubrication failure or abrasive soot contamination in aging 6.4L engines. Our replacement 5I-8068 units utilize advanced induction hardening to achieve a surface hardness of HRC 50-55, significantly reducing the risk of pitting. By ensuring an Ra 0.2 mirror finish on the journals, we prevent the friction-induced scoring that leads to catastrophic carbon contamination of the oil circuit, extending the service life of your S6K engine camshaft.
Engine rebuilders operating in the global heavy equipment network require uncompromised dimensional accuracy for timing gear synchronization. Every 5I-8068 unit, cross-referenced to 5I-7536 and Mitsubishi ME088880, is CNC ground and dynamically balanced to eliminate high-RPM vibrations. Whether you are overhauling an E200B camshaft or maintaining a 320N industrial unit, our factory-direct inventory provides the reliability required to restore peak combustion efficiency to your 6.4L inline-6 diesel assets.
| Parameter | Technical Value |
|---|---|
| Primary OEM Number | 5I-8068 / 5I8068 |
| Engine Compatibility | Caterpillar S6K / S6K-T (6.4L) |
| Material Grade | Chilled Cast Iron |
| Surface Hardness | HRC 50-55 (Induction Hardened) |
| Bore x Stroke | 102.0 mm x 130.0 mm |
| Cold Valve Clearance | Intake & Exhaust 0.25 mm (0.010 in) |
| Cross-Reference | 5I-7536, Mitsubishi ME088880 |
Our heavy-duty valvetrain catalog covers the complete Caterpillar 300-series engine family, specializing in the S4K and S6K platforms. Explore our complete Caterpillar Categories for additional camshafts, lifters, and master engine overhaul kits.
| Engine | Part No. | Application / Equipment |
|---|---|---|
| S4K | 5I-7536 | Excavator E120B, E110B, E312 |
| S6KT | 5I-7649 | Excavator E200B (Early version) |
| 3304 | 8N4111 | Dozer D4E; Loader 951, 955; Grader 120G |
| 3306 | 8N3981 | Excavator E330; Dozer D6D, D7G; Loader 966C/D |
| 3406 | 9Y3225 | Dozer D8N, D8R; Generator Sets; Trucks (3406B/C) |
| 3408 | 2W7980 | Dozer D9N, D9R; Loader 988B; 631E Scraper |
| 3116 | 6I4098 | Excavator 320/322/325 L; Loader 950F, 960F |
| C6.4 | 236-4700 | Excavator 320D, 320D FM (Common Rail) |
| C6.6 | 316-2487 | Excavator 320E, 323E; Loader 953D, 963D |
| C7 | 242-1787 | Excavator 324D, 325D, 329D; Pavers |
| C7.1 | 335-3138 | Excavator 320D2, 323D2; Loader 950K, 962K |
| C9 | 242-0673 | Excavator 330D, 336D; Dozer D6R III, D6T |
| C11 | 187-8969 / 223-7468 | Loader 966H, 972H; Dozer D8T (Partial) |
| C12 | 136-4335 | Trucks; Marine; Excavator 365B (Partial) |
| C13 | 224-1275 | Excavator 345C, 345D, 349D; Dozer D8T |
| C15 | 139-0538 / 332-7301 | Excavator 365C, 385C; Dozer D8T, D9T |
| C18 | 332-7297 | Excavator 385C FS; Generators; Marine |
| S6K | 5I-8068 | Excavator E320, E320B, E320C (Mitsubishi base) |
| Make | Machine Model | Year Range | Engine | Application |
|---|---|---|---|---|
| Caterpillar | 320 / 320L / 320B | 1992–2002 | CAT S6K | Track Excavator |
| Caterpillar | E200B / EL200B | 1987–1993 | CAT S6K | Hydraulic Excavator |
| Caterpillar | 312 / 312B (Select S/N) | 1993–2002 | CAT S6K | Compact Excavator |
| Mitsubishi | MS180 / MS240 | 1985–1995 | 6D16 / S6K | Industrial Equipment |
Premature wear is typically caused by lubrication failure or the reuse of worn tappets (lifters) on a new shaft. Microscopic abrasives from oil contamination scratch the lobe surface, eventually grinding them flat. Our HRC 50-55 hardened chilled iron provides a high-strength wear barrier, but we strictly recommend installing a new set of tappets and high-quality oil filters with every 5I-8068 replacement.
Yes, they share the same architecture. The S6K is based on the Mitsubishi 6D16 platform, and the 5I-8068 unit is fully compatible with Mitsubishi part number ME088880. This makes it an ideal cross-brand solution for fleets running both CAT 320 excavators and Mitsubishi industrial machinery. Always verify your camshaft bushing clearances in the block before final installation.
For the Caterpillar S6K engine, the cold valve clearance must be set to 0.25 mm (0.010 in) for both intake and exhaust valves. Correct lash adjustment is vital to prevent excessive noise and ensure the 6.4L engine achieves its rated torque output. We recommend checking lash again after the first 50 hours of operation following a camshaft replacement.
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