Heavy-duty forged steel Caterpillar C9 crankshaft (OEM 282-7958). Precision-engineered for CAT C9 ACERT engines in 330D, 336D excavators and D6T dozers. Induction-hardened journals resist scoring from HEUI system loads
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Industrial Diesel Engine Components define the productivity of heavy earthmoving equipment, and Ruich Value delivers trusted aftermarket solutions for your Caterpillar C9 fleet. We specialize in supplying robust internal engine parts that match the high-performance requirements of modern construction and mining machinery.
This forged steel crankshaft, referencing OEM 282-7958, is designed for the powerful Caterpillar C9 ACERT engine found in the 330D series excavators and D6 track-type tractors. Known for its advanced HEUI fuel system and high torque output, the C9 requires a crankshaft capable of withstanding immense torsional stress. Our replacement units feature induction-hardened journals to combat wear and are precision-balanced to ensure smooth operation under heavy loads. Whether you are rebuilding a 336D excavator or a D6T dozer, our C9 crankshaft provides the structural integrity needed to extend your machine’s service life.
| Part Name | Engine Crankshaft |
| Primary OEM Number | 282-7958 |
| Cross Reference | 160-8199 / 212-8566 |
| Engine Application | Caterpillar C9 ACERT (8.8L) |
| Material Standard | Forged Steel (High-Strength Alloy) |
| Hardness Specification | Induction Hardened Journals (>HRC 52) |
Technician’s Note: Similar to the C7, the C9 engine is prone to HEUI pump failures that contaminate the oil system with metal shavings. This debris often lodges in the oil cooler and can instantly score the journals of a new crankshaft. It is mandatory to replace the oil cooler and thoroughly flush the block galleries when installing this crankshaft (282-7958) after a bearing failure.
| Engine Model | Application Field | Verified Equipment Models |
|---|---|---|
| CAT C9 ACERT |
|
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Ruich Value supports the global heavy equipment industry with a comprehensive line of Industrial Diesel Engine Components. From legacy mechanical engines to modern ACERT powerplants, our crankshaft catalog ensures you have the right core part for every rebuild.
Category coverage: Our inventory includes forged crankshafts for CAT 3306, 3304, S6K, 320D (C6.4), C7, C9, C13, and C15 series engines.
| Engine Model | OEM Ref. Number | Material Spec | Primary Application (Famous Models) |
|---|---|---|---|
| S4K | 4W-3989 5I-7777 | Casting / Forging | Excavators: CAT E110B, E120B Loaders: CAT 910E |
| S4KT | 5I-7844 135-2419 | Forging (Rec.) | Excavators: CAT 312, 312B, 312C |
| S6K | 5I-7670 (Mitsu: 34320-10010) | Casting / Forging | Excavators: CAT E200B, 320, 320L Graders: 120B |
| S6KT / 3066 | 5I-7671 125-3005 205-0672 | Forging | Excavators: CAT 320B, 320C, 323C (The "Gold Standard" for 320 series) |
| C6.4 / 320D | 261-1544 294-1749 | Forging | Excavators: CAT 320D, 320D L, 323D |
| 3306 | 4N-7693 2W-7458 | Forging (OEM) | Dozers: CAT D6C, D6D, D7G Graders: 12G, 140G Trucks: Many International/Freightliner trucks |
| 3304 | 4N-7692 | Forging | CAT D4E, 951C, 955L, 120G (Same family as 3306) |
| 3204 | 1W-9002 / 7N-1300 | Casting/Forging | CAT D3, 931, 943, 953 (Smaller Engine) |
| C13 | 313-3997 243-2895 | Forging | Trucks: Kenworth T800, Peterbilt 379 Excavators: CAT 345C, 349D |
| C7 | 271-5658 224-3255 | Forging | Trucks: Ford F650/F750, GMC TopKick Loaders: CAT 950H, 962H Excavators: 324D, 325D |
| C9 | 282-7958 160-8199 212-8566 | Forging | Excavators: CAT 330C, 330D, 336D Dozers: CAT D6R, D6T |
| C15 | 221-9360 337-0201 IV-1606 | Forging | Trucks: King of the Road (Peterbilt 389, Kenworth W900) Dozers: CAT D8T Excavators: 365C, 385C |
| C18 | 222-3236 260-0677 | Forging | Generators: CAT C18 Gensets Loaders: CAT 988H Marine: CAT C18 Marine Propulsion |
| C4.2 | 238-3449 (Perkins 1104D base) | Casting / Forging | Excavators: CAT 312D, 314D, 315D |
| 3406E | 101-3228 4P-9055 | Forging | Trucks: 1990s Era Heavy Trucks Dozers: CAT D8R, D9R Loaders: 980G |
View all specs in our Industrial Diesel Engine Components Crankshaft Catalog.
A: No. The C9 is a modern 8.8L engine designed to replace the 3306 (10.5L) in many applications, but they share no internal components. The C9 crankshaft (282-7958) is specific to the C9 ACERT architecture and cannot be used in a 3306 block.
A: The 282-7958 is primarily for industrial and earthmoving machines (“Yellow Iron”). Marine C9 engines may use a different crankshaft depending on the specific arrangement (e.g., different nose for auxiliary drives). Please provide your engine serial number (ESN) to our team for verification.
A: This crankshaft is manufactured from Forged Steel. Given the high horsepower (up to 400HP) and torque of the C9 engine, cast iron crankshafts are prone to failure and are not recommended for heavy-duty applications.
Customized/billet crankshaft development based on drawings or samples is also possible.
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