1U3147 Seal Fits Caterpillar Models
1U3147 Seal Fits Caterpillar Models
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One New Aftermarket Replacement U-Cup Rod Seal for Caterpillar (Cat) Construction Equipment
This aftermarket replacement U-cup rod seal (Caterpillar part number 1U3147) is used in hydraulic cylinder applications across a wide range of Caterpillar (Cat) Challenger, Excavator, Track Loader, Track-Type Tractor, Vibratory Compactor, and Wheel Loader equipment. U-cup seals provide reliable hydraulic fluid retention on cylinder rods, helping prevent leaks and maintaining consistent hydraulic system pressure.
Specifications
- Seal Type: U-Cup (Rod Seal)
- Inside Diameter: 0.37 in
- Outside Diameter: 0.63 in
- Width: 0.16 in
- Weight: 0.01 lbs
Compatible Models
Caterpillar Challenger: 65, 65C, 75C, 75D, 85C, 85D
Caterpillar Excavator: 215B, 225, 229, 235C
Caterpillar Track Loader: 963, 963B, 973
Caterpillar Track-Type Tractor: D6N, D6T, D8N, D8R, D8R II, D9R
Caterpillar Vibratory Compactor: CB-434, CB-434B, CB-434C, CB-534B, CB-534C, CB-535B, CB-544, CB-545
Caterpillar Wheel Loader: 950B, 980C
Replaces Part Number(s):
1U3147
New aftermarket replacement part - not remanufactured, not used.



