Replacement Main Bearing for Caterpillar ® 3406 Applications 0.025 Cross Reference OEM Cross References: 4W5698 Superseded/Alternate Numbers: M-8N5422

1 x Main Bearing – .025″

Engine S/N: Caterpillar 3406E | C15 | M-4W5698

OE Replacements: 370021, 4W5698

Application & Fitment

• Engine Make: Caterpillar
• Engine Model / Application: 3406

Confirm the original part number and engine identification before ordering. Where applicable, also verify serial-number range, production year, piston style, bearing size or other configuration notes shown in the product information.

Part Numbers & Cross References

• OEM Cross Reference: 4W5698
• Alternate / Superseded: M-8N5422
• Interstate-McBee Reference: M-4W5698

Need Help Confirming Fitment?

Use the engine model, serial number and original part number when checking compatibility. For kits and sets, review the complete component breakdown above before ordering because contents can vary by engine configuration.