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Komatsu Marine Parts
BEARING (SWING 1ST)
Availability: 2-7 days
Shipping: Worldwide
Price
On Request
Quote reference: Part No. 20Y-26-21281
Need help identifying this part?BEARING (SWING 1ST) #4
Product Details
Part Number
20Y-26-21281
Description
BEARING (SWING 1ST) #4
Brand
Komatsu
Category
PISTON WEAR RINGS
Availability
2-7 days
Shipping
Worldwide
Price
On Request
Product Description
Komatsu Bearing or bushing 20Y-26-21281
1. Product Overview
Komatsu Bearing or bushing 20Y-26-21281 is listed under source title “BEARING (SWING 1ST)”. It is classified for this batch as bearing or bushing within the rotating-component support 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 bearing or bushing supports a shaft, journal, gear, connecting rod, or other moving component while controlling alignment and friction. Geometry, clearance, load direction, lubrication, and material are specific to the installed position.
The bearing surface carries load across a controlled contact area and maintains a lubricating film or rolling contact. Correct oil supply, housing fit, shaft condition, and installed clearance are essential.
3. Application Status
| Manufacturer / brand | Komatsu |
|---|---|
| Part number | 20Y-26-21281 |
| Component category | Bearing or bushing |
| System | Rotating-component support |
| 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 |
|---|---|
| Knock, rumble, or abnormal rotational noise | May indicate clearance, lubrication, alignment, or surface damage. |
| Metal particles in lubricant | Requires prompt investigation of bearings and other wear components. |
| Low oil pressure or elevated temperature | Can involve bearing clearance, pump condition, restriction, or oil quality. |
| Scoring, wiping, pitting, or discoloration | Shows distress that requires root-cause analysis. |
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 exact bearing position and load class.
- Inspect the shaft or journal, housing, oil passages, and adjacent thrust surfaces.
- Measure using the manufacturer’s procedure and limits.
- Confirm size grade, oversize or undersize status, and engine arrangement.
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 20Y-26-21281 against serial-number-specific parts documentation before purchase or installation. Do not select the component by appearance or part-number similarity alone.