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Caterpillar Camshafts for 3306, C15, C9 | Induction Hardened HRC 60 | Wholesale

Uncompromising Metallurgy: Camshaft Reliability for Industrial Diesel Power. Precision-engineered Caterpillar Camshafts covering legendary 3306 blocks, C15 ACERT platforms, and compact C-series engines. Induction hardened to HRC 58-62 for extreme durability in mining and heavy construction applications.

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Quick Summary: Caterpillar Camshafts

Wholesale Caterpillar Camshaft assemblies for industrial engines including the 3306, C9, and C15. Our induction-hardened cams resolve lobe pitting and fit heavy equipment like the D6D Dozer, 365C Excavator, and 385C. Contact us for exact OEM cross-referencing and custom billet development.

Precision Metallurgical Engineering for CAT Engine Cams

In the relentless cycle of a heavy-duty industrial diesel engine, the camshaft is the mechanical conductor, dictating precise “breathing” efficiency and, in some configurations, injector timing. Ruich Value resolves critical maintenance shortages with a wholesale inventory of high-precision CAT Engine Cams designed specifically to endure the grueling demands of mixed fleets. Whether you are replacing a pitted D6D Camshaft (3306) or performing a complete valvetrain overhaul on a 365C Excavator Camshaft (C15), our catalog provides the metallurgical hardness required to resist catastrophic surface fatigue. Caterpillar engines utilize robust, gear-driven valvetrains built for longevity. However, extended oil drain intervals or high-soot operating conditions frequently lead to severe wear. The most common failures involve Cam Lobe Pitting and flattening, directly caused by extreme sliding friction when roller followers begin to seize. Our replacement assemblies are manufactured from premium Forged Steel or Chilled Cast Iron. Utilizing advanced Induction Hardened Camshaft processes, we treat the critical lobes and journals to a surface hardness of HRC 58-62, effectively creating an impenetrable wear barrier. Engine rebuilders and specialized diesel workshops require uncompromised accuracy to ensure correct injector timing and prevent valve-to-piston contact. As a trusted supplier of Wholesale Caterpillar Camshafts, every unit we produce is CNC profile ground using specialized Landis grinding machines. We maintain a bearing journal micro-finish of Ra 0.2, guaranteeing a hydrodynamic oil film that prevents bearing seizure under extreme loads. We supply the precision necessary to keep your Caterpillar fleet moving, profitably and reliably.

Why Source Caterpillar Camshafts from Ruich Value?

  • Induction Hardening Process: We treat the cam lobes and journals to HRC 60, aggressively protecting against the Cam Lobe Pitting common in high-mileage C15 and 3406 engines running extended oil intervals.
  • Profile Precision (CNC Landis): Our cams are ground to exact OEM lift and duration specs, ensuring correct injector timing and valve overlap for critical ACERT engines.
  • Journal Micro-Finish: Bearing journals are micro-polished to an exacting Ra 0.2 finish, ensuring a perfect hydrodynamic oil film to prevent catastrophic bearing seizure under load.
  • Extensive OEM Coverage: We maintain inventory of fast-moving part numbers, including the 8N3981 (3306), 139-0538 (C15), and 242-0673 (C9), supporting urgent rebuilds for mining equipment.
  • Custom Billet Development: Beyond standard OEM replacements, we offer specialized billet camshaft manufacturing based on customer drawings or original samples for unique industrial applications.

Understanding CAT Camshaft Architectures

Camshaft Type Key Characteristics Typical Engine Platforms
In-Block Cam (Pushrod) Located deep in the cylinder block. Actuates valves via long pushrods. Highly durable, gear-driven from the front housing. 3304, 3306, C7, C9, 3126
Overhead Cam (OHC) Located in the cylinder head. Directly actuates valves and, crucially, the Electronic Unit Injectors (EUI). Requires extreme profile precision. 3406E, C15, C16, C18
Compact Industrial Smaller, lighter profiles designed for compact construction equipment. Often shared with partner brands. 3066, S6K, C6.4, C4.4

Available Caterpillar Camshaft Range

Explore our comprehensive catalog of replacement Caterpillar Engine Cams. Factory direct supply with global export experience.
EnginePart No.Application / Equipment
S4K5I-7536Excavator E120B, E110B, E312
S6KT5I-7649Excavator E200B (Early version)
33048N4111Dozer D4E; Loader 951, 955; Grader 120G
33068N3981Excavator E330; Dozer D6D, D7G; Loader 966C/D
34069Y3225Dozer D8N, D8R; Generator Sets; Trucks (3406B/C)
34082W7980Dozer D9N, D9R; Loader 988B; 631E Scraper
31166I4098Excavator 320/322/325 L; Loader 950F, 960F
C6.4236-4700Excavator 320D, 320D FM (Common Rail)
C6.6316-2487Excavator 320E, 323E; Loader 953D, 963D
C7242-1787Excavator 324D, 325D, 329D; Pavers
C7.1335-3138Excavator 320D2, 323D2; Loader 950K, 962K
C9242-0673Excavator 330D, 336D; Dozer D6R III, D6T
C11187-8969 / 223-7468Loader 966H, 972H; Dozer D8T (Partial)
C12136-4335Trucks; Marine; Excavator 365B (Partial)
C13224-1275Excavator 345C, 345D, 349D; Dozer D8T
C15139-0538 / 332-7301Excavator 365C, 385C; Dozer D8T, D9T
C18332-7297Excavator 385C FS; Generators; Marine
S6K5I-8068Excavator E320, E320B, E320C (Mitsubishi base)

Explore our complete Caterpillar Engine Parts Catalog.

Compatible Equipment Models

Caterpillar Camshafts fit equipment including CAT D6D/D7G Dozers (3306), CAT 320D Engine Cam (C6.4), CAT 324D/330D Excavators (C7/C9), CAT 365C/385C Excavators (C15/C18), and CAT 950H/988H Loaders (C7/C18). Contact us for complete application coverage and profile specifications.

Technical Q&A: Caterpillar Camshafts

Why did my CAT camshaft fail with a Flattened Cam Lobe? (Tier 2 – Service Manuals)

Symptom: The engine develops a loud ticking noise, loses power, and a specific exhaust or intake valve fails to open fully. Diagnosis: The most common cause is a Rocker Arm Roller Seizure. If the roller on the rocker arm or cam follower stops rolling, it slides against the cam lobe. This extreme sliding friction destroys the hardened surface (HRC 60) in minutes, grinding the lobe flat. Solution: We strongly recommend replacing all Rocker Arms or Followers when installing a new camshaft to prevent immediate repeat failure.

3406E vs C15 Camshaft: Are they interchangeable? (Tier 1 – CAT SIS)

Diagnosis: While the 3406E and the C15 are closely related overhead cam engines and the camshafts will physically fit into the same cylinder head, they are NOT interchangeable. The cam profiles—specifically the lift and duration, and the injector firing lobe profiles—are machined differently to match the varying Electronic Unit Injector (EUI) flow rates and ECU mapping (especially on ACERT models). Solution: Always verify your engine serial number or the specific casting number. Using the wrong cam will result in low power, high exhaust gas temperatures (EGTs), or severe check engine codes.

Does the new camshaft come with the front drive gear installed? (Tier 2 – Technical Documentation)

Answer: For most large-displacement CAT engines (like the C15 and 3406 series), the front timing gear is a massive, heavy-duty component that is press-fit onto the camshaft snout. Because these gears rarely fail, our camshafts are typically sold as “Bare Shafts” without the gear. Solution: You must carefully press off the old gear and press it onto the new camshaft using the correct factory alignment marks. If you require the gear pre-installed, please specify this during your quote request.

Are the CAT 3066 and Mitsubishi S6K camshafts the same? (Tier 1 – CAT SIS)

Answer: Yes. The CAT 3066 engine, famously used in the CAT 320B and 320C excavators, is a rebranded Mitsubishi S6K engine block. Therefore, the camshafts are structurally identical. For example, our replacement camshafts will cross-reference perfectly with the Mitsubishi OEM number 5I-8068, ensuring exact valve timing for your 320-series excavator rebuild.

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📱 WhatsApp: +86 13889277673 📧 Email: [email protected]

⚡ Fast response | Factory direct | Global shipping | ISO 9001 Certified

Custom Camshaft manufacturing available based on samples or drawings.

Trade pricing on request.

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For Any Inquiries, please feel free to contact us, Our sales teams are always glad to support your business