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Induction-Hardened Caterpillar Camshafts for C15, 3306 & 3406E Engines

Precision Valve Timing: Heavy-Duty Camshafts for Mining & Construction Machinery

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Uncompromising Metallurgy: Camshaft Reliability for Industrial Diesel Power

In the high-torque cycle of a heavy-duty diesel engine, the camshaft dictates the “breathing” efficiency and injector timing. Ruich Value resolves critical maintenance shortages with a wholesale inventory of high-precision Caterpillar Camshafts, designed for mixed industrial fleets. Whether you are replacing a pitted camshaft on a C15 ACERT highway truck or overhauling a legacy 3306 mechanical engine in a D6 dozer, our catalog provides the metallurgical hardness required to resist lobe wear and roller follower damage. Caterpillar engines utilize robust gear-driven camshafts designed for extreme durability. However, extended oil intervals can lead to surface fatigue and lobe flattening. Our replacement assemblies are manufactured from Forged Steel or Chilled Cast Iron, featuring lobes induction hardened to HRC 58-62. This superior surface treatment ensures the cam profile retains its lift specifications even under the extreme contact pressure of unit injector rocker arms.

Buyer’s Guide: Caterpillar Camshaft Architectures

Cam Location Key Engine Models Tech Identification
Overhead Cam (OHC) (Gear Driven) 3406E, C15, C16, C18 Located in the cylinder head. Massive, heavy shafts. Check front gear helical cut angle and nose cone design.
In-Block Cam (Pushrod Type) 3304, 3306, 3406B/C, C9 Traditional design. Actuates valves via pushrods. C9 uses the cam to drive the HEUI pump.
Compact Industrial (Utility Spec) 3066, 3054, C4.4 Often Mitsubishi or Perkins based architectures. Cam gears may be press-fit.

Caterpillar Engine & Equipment Applications

Engine Series Compatible Vehicles & Machinery
C15 / 3406E
  • Excavators: 365C, 385C
  • Mining Trucks: 740, D400E
  • On-Highway: Peterbilt 379, Kenworth W900
3306 / 3304
  • Track-Type Tractors: D6D, D7G
  • Motor Graders: 12G, 140G
  • Pipelyayers: 571G, 572G
C7 / C9
  • Excavators: 324D, 325D, 329D
  • Wheel Loaders: 950H, 962H
  • Track Loaders: 973C

Why Source Caterpillar Camshafts from Ruich Value?

  • Induction Hardening: We treat the cam lobes and journals to a depth that allows for superior wear resistance (HRC 60), protecting against the pitting common in high-mileage C15 engines.
  • Profile Precision: Our cams are ground on CNC Landis machines to exact OEM lift and duration specs, ensuring correct injector timing and valve overlap for optimal combustion.
  • Gear Quality: For gear-driven cams, we ensure the helical gears are precision-machined and heat-treated to mesh perfectly with the crankshaft gear, preventing gear whine and backlash.
  • Journal Finish: Bearing journals are micro-polished to Ra 0.2 or better, ensuring a hydrodynamic oil film is maintained to prevent bearing seizure.
  • Ready Stock: We maintain inventory of fast-moving cams for the 3306 and C15 series, supporting urgent rebuilds for mining and construction equipment.

Available Caterpillar Camshaft Range

Explore our comprehensive catalog of replacement Engine Cams. If you require a specific Jake Brake compatible cam or marine spec, please contact our team.
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)

Looking for more components? Explore our complete Caterpillar Industrial Diesel Engine Parts Catalog

Technical FAQ: Caterpillar Camshafts

Q1: Why did my C15 camshaft fail (flattened lobes)?

The most common cause is a seized roller on the rocker arm / cam follower. If the roller stops rolling, it slides against the cam lobe, destroying the hardened surface in minutes. We strongly recommend replacing all Rocker Arms or Followers when installing a new cam.

Q2: Are 3406E and C15 camshafts interchangeable?

Not always. While they fit in the same head, the cam profiles (lift and duration) are different to match the different injector flow rates and ECU mapping. Using the wrong cam can cause low power, high EGTs, or check engine codes. Always check the casting number.

Q3: Does the camshaft come with the front gear?

For most large CAT engines (C15/3406), the front gear is a heavy, press-fit component that is often reusable. Our camshafts are typically sold as “Bare Shafts”. If you need the gear installed, please specify this in your request.

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Note: Customized/billet development based on drawings or samples is also available for high-performance or obsolete engine applications.

Email: [email protected] WhatsApp/Phone: +86 13889277673

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