Oil Seal 1S6543 for Caterpillar Equipment

Oil seal with a lip-type sealing design for Caterpillar equipment used in track-type tractors, wheel-type loaders, wheeled tractor-scrapers, pipe-layers, track loaders, load-haul-dump machines, and articulated dump trucks. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The seal is identified as a lip-type oil seal and is listed for the Caterpillar machine models and series below. Fitment should be checked against the machine model, serial number, and the part number installed on the equipment before replacement.

Fitment

• Track-Type Tractor: Caterpillar 153, 163, 4, 55, 56H, 6, 6A, 6S, 6SU, D6C, D6D, D6E, D6H, D6H II, D7F, D7G.
• Wheel-Type Loader: Caterpillar 988.
• Wheeled Tractor-Scraper: Caterpillar 615, 615C II.
• Pipe-Layer: Caterpillar 571G, 572G.
• Track Loader: Caterpillar 951, 955, 977K, 977L, 983, 983B.
• Load-Haul-Dump: Caterpillar R1700II.
• Articulated Dump Truck: Caterpillar D20D, D250B, D250D, D25C, D25D, D300B, D300D, D30C, D30D, D350C, D350D, D35C.

The supplied fitment data also identifies the part for Caterpillar models 572G, 615, 615C, 977K, 977L, 983, 983B, 988, D250B, D25C, D25D, D300B, D30C, D350C, D35C, D6C, D6D, D6E, D6H, D7F, D7G, and R1700 II. Model designations may include spaces or suffixes in parts catalogues, so the complete machine identification should be used when verifying application.

Cross-reference numbers

• 1S-6543 — part number format associated with this oil seal.
• 1S6543 — unhyphenated part number format and product SKU.

Specifications

Before installation, compare the removed seal with the listed dimensions and confirm the required part number. The outside diameter, shaft diameter, and seal width are specified in inches. The sealing element material is ACM, also identified as polyacrylate.