Replacement Main Bearing for Caterpillar ® D343/D346/D348/D349 Applications OEM Cross References: 7W2138 Superseded/Alternate Numbers: M-4M2919, M-6N8759, M-8N5345

Product Details

Bearing – Main for Caterpillar Engine ? OEM Replacement 7W2138

High-Quality Diesel Engine Part for Caterpillar Engine

This premium Bearing – Main is built to meet or exceed OEM specs for Caterpillar Engine diesel engines. Direct-fit replacement for 7W2138.

Function & Importance

The Bearing – Main maintains key engine processes for efficiency and longevity. Failure leads to poor performance or breakdowns.

• OEM Ref: 7W2138
• Engine Make: Caterpillar Engine
• Precision-engineered for durability
• Ideal for rebuilds or maintenance

Why Choose HDKits?

HDKits guides diesel techs with expert support, deep inventory, and fast fulfillment for repairs big and small.

FAQs

Q: What does the Bearing – Main do?
A: It ensures smooth engine operation, protecting against wear.

Q: How do I know if it needs replacing?
A: Look for odd noises, loss of power, or diagnostic codes. Contact HDKits if unsure.

Q: Can I install it myself?
A: Basic mechanical skills needed; consult a pro or HDKits experts if in doubt.

Application & Fitment

• Engine Make: Caterpillar
• Engine Model / Application: D343/D346/D348/D349

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: 7W2138
• Alternate / Superseded: M-4M2919, M-6N8759, M-8N5345
• Interstate-McBee Reference: M-7W2138

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.