Engines and Components› Crankshafts and Components
SEALED POWER
CRANKSHAFT ASSY.
SKU: S03T FP-3918986
Professional / shop required
Description
It serves as a direct replacement for various OEM part numbers, including 3918986, 3917443, 3917320, 3904363, 3910968, 3914584, and 3905625. This unit is provided as new and does not require a core exchange.
Designed for heavy-duty, industrial, and agricultural use, this crankshaft supports the robust operating requirements of the Cummins 8.3L platform found in various medium-duty trucks, construction equipment, and tractors.
Proper installation is critical for engine longevity. Ensure all main bearings are sized correctly and that clearances are verified during engine rebuild processes. Follow engine manufacturer service manuals for torque specifications and installation procedures.
Fitment
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Specifications
| Brand | SEALED POWER |
| Part Number | S03T FP-3918986 |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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