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

Caterpillar® 621R, 621S – Wheel Tractor-Scrapers

Serial number ranges

Tractor S/N: 12Y1-UP,8KD1-UP
Scraper S/N: 2TF1-UP

Application (Cylinder)Caterpillar® Part No.DescriptionBoreRodNote / Serial No.
Steering243-0386Seal Kit5.000"2.500"S/N: 12Y,2TF1-638
242-2542Seal Kit5.000"2.500"S/N: 2TF639-UP Use with 7J-5525 Piston
243-0384Seal Kit5.000"2.500"S/N: 2TF639-UP Use with 9T-8563 Piston
Servo-Master8T-1387Seal Kit1.500"0.750"S/N: 12Y
Servo8T-4771Seal Kit1.500"0.750"S/N: 8KD
Apron244-0957Seal Kit7.250"2.750"S/N: 2TF1-859
244-0954Seal Kit7.250"2.750"S/N: 2TF860-UP
Bowl242-2545Seal Kit6.000"2.500"S/N: 2TF
Ejector246-0643Seal Kit6.500"4.000"S/N: 2TF1-699
246-0641Seal Kit6.500"4.000"S/N: 2TF700-UP

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

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