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Caterpillar Marine Parts
106.35mm Diameter Cylinder Rod U-Cup Seal
Availability: 2-7 days
Shipping: Worldwide
Price
On Request
Quote reference: Part No. 351-2177
Need help identifying this part?106.35mm Diameter Cylinder Rod U-Cup Seal-351-2177-Cat
Product Details
Part Number
351-2177
Description
106.35mm Diameter Cylinder Rod U-Cup Seal-351-2177-Cat
Brand
Caterpillar
Category
CYLINDER HEAD
Availability
2-7 days
Shipping
Worldwide
Price
On Request
Product Description
Caterpillar Seal or O-ring 351-2177
1. Product Overview
Caterpillar Seal or O-ring 351-2177 is listed under source title “106.35mm Diameter Cylinder Rod U-Cup Seal”. It is classified for Batch 3 as seal or o-ring within the fluid and pressure sealing system. The source record does not establish an exact engine model. Confirm the complete engine model, serial number, arrangement, and installed reference before ordering.
2. Function and Operating Principle
A seal limits leakage between stationary or moving engine components. Seal profile, material, hardness, size, pressure direction, temperature capability, and fluid compatibility are application-specific.
The seal is compressed or energized within a groove or housing to close the leakage path. Dynamic seals must also manage movement while retaining lubrication and excluding contamination.
3. Application Status
| Manufacturer / brand | Caterpillar |
|---|---|
| Part number | 351-2177 |
| Component category | Seal or O-ring |
| System | Fluid and pressure sealing |
| Evidence level | C — Component identity only |
| Engine application | Not established by the supplied record |
4. Typical Signs That Inspection May Be Required
| Observation | Possible significance |
|---|---|
| Fluid leakage near a shaft, flange, or housing | May indicate seal wear, surface damage, pressure problems, or installation error. |
| Hardened, cracked, or flattened seal | Shows deterioration that can reduce sealing contact. |
| Repeated leakage after replacement | May point to shaft wear, misalignment, groove damage, or incorrect seal selection. |
| Contamination entering the assembly | Can indicate loss of exclusion sealing or damaged protective components. |
These observations are inspection triggers rather than a confirmed diagnosis. Evaluate the complete engine system and follow the applicable manufacturer service information.
5. Inspection and Replacement Guidance
- Identify the sealed fluid and whether the joint is static or dynamic.
- Inspect grooves, shafts, bores, and mating surfaces.
- Use compatible assembly procedures and avoid twisting or cutting the seal.
- Confirm material and dimensions from the exact parts documentation.
6. Information Required Before Ordering
- Complete engine or equipment model.
- Engine serial number and arrangement or configuration number.
- Installed part reference and clear photographs of the identification label.
- Installation position and related assembly information.
Compatibility notice: Verify 351-2177 against serial-number-specific parts documentation before purchase or installation. Do not select the component by appearance or part-number similarity alone.