Main Bearing 0.51 mm O.S & U.S – 128-0403

For buyers searching by part number or engine application, this page identifies Main Bearing 0.51 mm O.S & U.S 128-0403 and the Komatsu compatibility data supplied for it. Review the full list before ordering, especially where model suffixes or combined application codes are shown.

Komatsu Fitment Overview

Catalog data currently associates this product with 20 listed Komatsu engine/application references. Examples include 4D95L-1AA/1AA-7/1BB/1CC, 4D95L-1FF/GG/W/BW, 4D95L-1K/1L, with the complete list provided below.

Compatible Engines / Applications

• 4D95L-1AA/1AA-7/1BB/1CC
• 4D95L-1FF/GG/W/BW
• 4D95L-1K/1L
• 4D95L-E-2A
• 4D95LE-3-65
• 4D95L-W-1
• 4D95S-1H/1J
• 4D95S-W-1G-E
• 6D95L-1
• 6D95L-1AF-1
• S4D95L-1A/1B/1G
• S4D95L-1K
• S4D95LE-3A-2
• S6D95L-1
• S6D95L-1MM
• S6D95L-1NN/1PP
• SA6D95L-1
• SA6D95L-1AF-1
• SAA4D95LE-3A-4A/W
• SAA4D95LE-5

Product Details

• Item: Main Bearing 0.51 mm O.S & U.S
• Part Number: 128-0403
• Brand / Application Reference: Komatsu
• Catalog Specification: 0.51 mm
• Listed Applications: 20

Service and Replacement Notes

Bearing and main-metal selection depends on the exact engine application and the size or service specification stated in the item name. STD, undersize, oversize, pair, and set references should be matched exactly to the repair requirement. Do not substitute a different size or configuration based only on a similar part description.

Before Ordering

The most reliable fitment check is an exact part-number match combined with matching application data. Confirm 128-0403 against the original component, parts manual, or service record before purchase.