For heavy-duty earthmoving, the 282-7958 crankshaft delivers 400HP-rated durability. Fits C9 8.8L ACERT in 330D excavators and D6T dozers. Factory direct wholesale
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Engineered for heavy-duty earthmoving applications, the 282-7958 rotating assembly is a 400HP-rated forged steel crankshaft for the Caterpillar C9 8.8L ACERT engine. It directly replaces worn components in CAT 330C, 330D, and 336D excavators to restore vital hydraulic performance. Ready for factory direct wholesale.
In the high-stakes arena of heavy-duty earthmoving, equipment like the CAT 330D excavator and D6T dozer relies entirely on the structural integrity of the Caterpillar C9 crankshaft. When subjected to continuous full-load operations—pushing massive volumes of rock or ripping through hardpan—the engine’s bottom end bears extreme torsional forces. The OEM 282-7958 rotating assembly is precision-forged to ensure your 330D excavator crankshaft application maintains the unwavering reliability required to keep production schedules on track without catastrophic engine failure.
A leading cause of bottom-end failure in the C9 platform is HEUI pump failure. When the high-pressure oil pump disintegrates, it flushes abrasive metallic shrapnel throughout the lubrication system. This oil contamination aggressively attacks the main bearings, resulting in severe crankshaft journal scoring. Our replacement forged steel crankshaft mitigates this vulnerability through specialized induction hardened journals. This thermal treatment creates a highly durable, wear-resistant surface that protects the CAT 330D crankshaft from accelerated degradation during extreme hydraulic cycles.
For independent workshops executing complex heavy equipment overhauls, sourcing reliable components is paramount. Our 282-7958 assembly perfectly cross-references the 160-8199 and 212-8566 supersessions, offering a definitive solution for a D6T dozer crankshaft or a 140M grader crankshaft rebuild. By partnering with us for factory direct wholesale supply, fleet managers can significantly reduce their excavator engine rebuild costs while securing a 400HP-rated component designed specifically for industrial Caterpillar applications.
| Parameter | Technical Detail |
|---|---|
| Primary OEM Number | 282-7958 / 2827958 |
| Cross-Reference | 160-8199 / 212-8566 |
| Engine Compatibility | Caterpillar C9 ACERT (8.8L) |
| Main Journal Diameter | 114.30 mm (4.500 in) |
| Rod Journal Diameter | 82.00 mm (3.228 in) |
| Stroke | 149.00 mm (5.866 in) |
| Material Grade | Forged High-Strength Alloy Steel |
| Process Technology | Induction Hardened Journals |
| Fuel System Environment | HEUI (High-Pressure up to 2500 PSI) |
Explore our comprehensive inventory of Caterpillar rotating assemblies, spanning the entire ACERT family including the C7, C9, and C15. Explore our complete Caterpillar Engine Parts Catalog for matching cylinder heads, HEUI injectors, and master overhaul kits.
| 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 |
| Make | Machine Model | Year Range | Engine | Application |
|---|---|---|---|---|
| Caterpillar | 330C / 330D / 336D | 2004–2015 | CAT C9 | Track Excavator |
| Caterpillar | D6R Series II & III / D6T | 2001–2014 | CAT C9 | Crawler Dozer |
| Caterpillar | 140M / 160M | 2007–2014 | CAT C9 | Motor Grader |
| Caterpillar | 973C / 973D | 2001–2016 | CAT C9 | Track Loader |
Diagnosis: As mentioned, HEUI pump failure sends fine metal shavings through the C9 engine’s oil passages. While the filter catches some, the oil cooler acts as a secondary, unintended trap. Solution: You cannot effectively flush these metallic particles out of a C9 oil cooler. If you install a new 282-7958 crankshaft without replacing the oil cooler, those trapped metal shavings will eventually break free, deeply scoring your new, induction-hardened journals and destroying the engine again.
Answer: The C9 ACERT engine generates massive cylinder pressures (often exceeding 2500 PSI during peak combustion) to meet emissions standards while delivering 400HP. This creates intense downward force on the connecting rods. To prevent fatigue cracking, our 282-7958 forged steel crankshafts utilize induction hardening specifically focused on the journal fillets (the radius transition), significantly increasing the metal’s tensile strength in the highest-stress zones.
Answer: No, they are absolutely not interchangeable. While both are inline 6-cylinder engines used in similar equipment classes (like dozers and graders), the C9 is an entirely different, modernized architecture (8.8L) designed for electronic HEUI injection. The 3306 (10.5L) uses a completely different block, stroke, and journal diameter. Always verify your specific engine arrangement number before ordering.
Answer: Extreme caution is required. While the core block architecture is similar, Marine C9 engines often utilize completely different front snout dimensions to drive massive raw water pumps or different power take-off (PTO) arrangements. This 282-7958 crankshaft is specifically designed and verified for Industrial and Earthmoving applications (Excavators, Dozers). Always verify the Engine Arrangement (AR) number for marine applications.
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