Caterpillar 1S-5138 Main Bearing - 1S5138
Main BearingCaterpillar 1S-5138 / 1S5138: Main Bearing. OEM and original replacement machine parts for construction equipment. Shipped globally with 1-year warranty coverage.
Caterpillar 1S-5138 / 1S5138 Main Bearing delivers OEM and aftermarket correct crankshaft bearing clearance in Caterpillar diesel engines for heavy equipment. OEM-matched overlay composition and precision wall thickness ensure reliable oil film formation and long bearing service life. Available with a 1-year warranty. Cross-referenced for compatibility with original equipment specifications.
Caterpillar