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← Useful Information · Caterpillar® Hydraulic Seal Kit Finder · Wheel Tractor-Scrapers

Caterpillar® 621B – Wheel Tractor-Scrapers

Serial number ranges

Tractor S/N: 45P1-UP,35V1-UP,7KC1-UP,8HC1-UP
Scraper S/N: 31V1-UP,36V1-UP,73V1-UP,6XB1-UP,9AC1-UP

Application (Cylinder)Caterpillar® Part No.DescriptionBoreRodNote / Serial No.
Steering243-0386Seal Kit5.000"2.500"
Servo-Master8T-1387Seal Kit1.500"0.750"
Load243-0381Seal Kit5.500"2.500"S/N: 45P1089-3944,35V815-UP
Load (cont)242-2539Seal Kit5.500"2.500"S/N: 45P3945-UP
Apron244-0957Seal Kit7.250"2.750"S/N: 31V1040-UP,36V1396-UP,73V778-UP,6XB,9AC
Bowl242-2545Seal Kit6.000"2.500"S/N: 31V,36V1363-UP,73V797-799,73V801-UP,6XB,9AC
Ejector246-0643Seal Kit6.500"4.000"S/N: 31V1338-UP,36V1503-UP,73V820-UP,6XB,9AC

For reference only. Send us your machine serial number before ordering and we will confirm the correct kit.

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