Seal 3W0203 for Caterpillar Equipment

3W0203 is an external seal used on Caterpillar equipment, including track-type tractors, track-type skidders, articulated dump trucks, and petroleum products equipment. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The part is identified by SKU 3W0203 and by the Caterpillar reference format 3W-0203. The supplied application data includes several Caterpillar machine families and model variants; the complete fitment list is provided below.

Fitment

Track-type tractors

• Caterpillar 5
• Caterpillar 55
• Caterpillar 5A
• Caterpillar 5P
• Caterpillar 5S
• Caterpillar D4H
• Caterpillar D4H III
• Caterpillar D4H XL
• Caterpillar D5H
• Caterpillar D5H XL

Petroleum products equipment

• Caterpillar TH31-E61
• Caterpillar TH35-E81

Track-type skidders

• Caterpillar 517
• Caterpillar 527
• Caterpillar D4HTSK II
• Caterpillar D4HTSK III
• Caterpillar D5HTSK II

Articulated dump trucks

• Caterpillar 725
• Caterpillar 725C
• Caterpillar 725C2
• Caterpillar 730
• Caterpillar 735
• Caterpillar 735 OEM

The fitment information covers the Caterpillar models listed above under their respective machine categories. Model suffixes and series designations are retained as shown in the application data, including XL, III, II, C, C2, E61, E81, and OEM variants.

Cross-reference numbers

• 3W0203
• 3W-0203

3W0203 and 3W-0203 are the two number formats associated with this seal in the supplied product data. The hyphenated format is used as the Caterpillar reference designation, while 3W0203 is the SKU format for this product.

Specifications

The dimensional data identifies the seal by its inner diameter and cross-section measurements. The inner diameter is specified in inches, while product package or overall dimensional data is listed separately in centimetres. The stated material is PTFE, and the seal type is external.

Before installation, the part number and machine model should be compared with the equipment documentation. For models with multiple configurations or production versions, the listed machine designation should be checked against the required 3W-0203 application.