Caterpillar 320B & 320B L 125-3015: CYLINDER BLOCK GP Parts
Caterpillar 320B & 320B L 125-3015: CYLINDER BLOCK GP: 18 original catalog entries from the Caterpillar 320B & 320B L Excavators · 3066T ENGINE · SIS SEBP2781 configuration.
Equipment and Catalog Identification
Equipment catalog configuration: Caterpillar 320B & 320B L Excavators · 3066T ENGINE · SIS SEBP2781. Application: 320B & 320B L Excavator · Machine serial 4XW00001-UP · SEBP2781. Original section: 125-3015: CYLINDER BLOCK GP. Verified equipment catalog identity: https://avspare.com/caterpillar/sebp2781/; archive section 11; archive listing page 1. The verified equipment catalog identifies the engine model as 3066. The supplied archive labels this configuration 3066T; the T suffix has not been independently verified. The original turbocharger-oil section is retained without asserting interchangeability or a different engine identity. Caterpillar parts documentation identifies the branded 3066 engine model; this does not establish interchangeability with other equipment or engine revisions. Engine serial range is not supplied. These selected sections cover engine arrangements, internal components, mounting, lubrication and cooling, including original cylinder-block and cylinder-head variants and turbocharger oil lines. Retain every arrangement, serial/date applicability and original note; this is not the entire machine parts book. Check machine and engine nameplates, arrangement numbers, serial ranges and original notes before ordering. This section does not establish interchangeability with other configurations.
Illustrations | Parts table | Request a quote
125-3015: CYLINDER BLOCK GP Illustrations

Original Caterpillar Parts List
The original part number is retained. Common Caterpillar Number is the same recognized number with its hyphen removed, for example 3N-2886 → 3N2886. Letters, digits and leading zeros remain unchanged. This is a spelling variant, not a substitute part or fitment guarantee. Unrecognized formats are marked for verification. Original quantities and notes apply; quantities do not indicate stock. An em dash represents an empty source field. Archive references are retained as source references.
| Ref. | Original Part Number | Common Caterpillar Number | Catalog Qty. | Original Description | Original Catalog Notes | Enquiry |
|---|---|---|---|---|---|---|
| 1. | 212-8566 Y | Not derived — verify | [1] | CYLINDER BLOCK GP | — | Ask for identification |
| 24. | 096-2501 | 0962501 | [3] | LOCKWASHER | — | Request a Quote |
| 25. | 8T-4179 M | Not derived — verify | [3] | BOLT (M12X1.75X20-MM) | — | Ask for identification |
| 26. | 5I-7588 | 5I7588 | [7] | SET-BEARING (STANDARD)(STANDARD) | — | Request a Quote |
| — | 5I-7784 B | Not derived — verify | [7] | SET-BEARING (0.25-MM US)(US=0.25MM ID) | — | Ask for identification |
| — | 5I-7785 B | Not derived — verify | [7] | SET-BEARING (0.5-MM US)(US=0.50MM ID) | — | Ask for identification |
| — | 5I-7786 B | Not derived — verify | [7] | SET-BEARING (0.75-MM US)(US=0.75MM ID) | — | Ask for identification |
| 27. | 5I-7654 | 5I7654 | [3] | PLATE (STANDARD)(STANDARD) | — | Request a Quote |
| — | 5I-7787 B | Not derived — verify | [3] | PLATE (0.15-MM OS)(OS=0.15MM) | — | Ask for identification |
| — | 5I-7788 B | Not derived — verify | [3] | PLATE (0.3-MM OS)(OS=0.30MM) | — | Ask for identification |
| — | 5I-7789 B | Not derived — verify | [3] | PLATE (0.45-MM OS)(OS=0.45MM) | — | Ask for identification |
| 28. | 266-6210 | 2666210 | [1] | SWITCH-PRESSURE (ENGINE OIL PRESSURE) | — | Request a Quote |
| 29. | 4D-7794 | 4D7794 | [1] | CLIP | — | Request a Quote |
| 30. | 7X-2536 M | Not derived — verify | [1] | BOLT (M8X1.25X14-MM) | — | Ask for identification |
| 31. | 3B-4505 | 3B4505 | [1] | LOCKWASHER | — | Request a Quote |
| 32. | 5I-7636 | 5I7636 | [1] | EYE | — | Request a Quote |
| 33. | 5I-7603 | 5I7603 | [1] | EYE | — | Request a Quote |
| 34. | 5I-7978 | 5I7978 | [1] | SLEEVE | — | Request a Quote |
Request a Quote from WinsDiesel
Send the original part number, required quantity, machine serial number, engine nameplate/model and serial number, arrangement number, application, component photos and delivery country. Supplied contents, specification, availability and lead time will be confirmed in the quotation.
Send an enquiry or email winsparts@winsparts.com.
Related Caterpillar Catalog Sections
- Caterpillar 320B & 320B L 125-2955: CRANKSHAFT GP Parts
- Caterpillar 320B & 320B L 212-8566: CYLINDER BLOCK GP Parts
- Caterpillar 320B & 320B L 5I-7753: COVER GP-VALVE MECHANISM Parts
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