BEARING - MAST ROLLER (Komatsu KO611669)

A worn mast roller bearing can cause uneven roller wear and increased friction in the mast assembly. This aftermarket replacement part references Komatsu as the OE maker and cross-references part number KO611669. The bearing supports the mast roller, allowing smooth vertical movement of the mast channel. When the bearing fails, the roller may bind or seize, leading to jerky mast operation and potential damage to the mast rails. Keeping the bearing in sound condition helps maintain consistent roller alignment and reduces stress on the mast structure. The item ships at approximately 1.49 pounds. Verify the serial number or application, then call (562) 693-7748.

Part number variants: KO611669, ko611669