Caterpillar C15 Industrial 304-9991 AIR COMPRESSOR GP Parts — Source page 84
Caterpillar C15 304-9991 AIR COMPRESSOR GP: 10 catalog entries transcribed from the supplied original PDF from the C15 Industrial Engine · JRE1-Up (Engine) configuration.
Engine and Catalog Identification
Source configuration: C15 Industrial Engine · JRE1-Up (Engine). Application: Industrial. Reviewed chapter: 304-9991 AIR COMPRESSOR GP. Archive index label: 222-2879 AIR COMPRESSOR GP. The supplied archive identifies its source as CATERPILLAR C15 INDUSTIRAL ENGINE PARTS MANUAL.pdf; source page 84. Check the full engine serial number, arrangement number, application and original notes before ordering. This section does not establish interchangeability with other configurations.
Original PDF Assembly Scope and Conditions
Original PDF physical page 84: COMPRESSOR GP 304-9991 AIR *R 15.7 CFM PART OF 222-2879 AIR COMPRESSOR GP FIELD REPLACEMENT FOR 223-3637–PAGE 37 AN ATTACHMENT.
The parts table retains the separate source assembly for each entry. Drawings retain their own original assembly headings and may show a narrower component scope. Original part numbers, conditions, graphic references, product levels and note flags apply; no interchangeability is implied.
Illustrations | Parts table | Request a quote
304-9991 AIR COMPRESSOR 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. Original manual page references are retained as source references.
| Ref. | Original Part Number | Common Caterpillar Number | Catalog Qty. | Original Description | Original Catalog Notes | Enquiry |
|---|---|---|---|---|---|---|
| 1 | 099-2374 | 0992374 | 2 | BOLT-SOCKET HEAD (M5X0.8X12-MM) | Original note flags: M; Graphic ref.: 1; Product level: 1; Source PDF section: 304-9991 AIR COMPRESSOR GP | Request a Quote |
| 2 | 225-5222 | 2255222 | 1 | VALVE AS-PRESSURE RELIEF (AIR COMPRESSOR) | Graphic ref.: 1; Product level: 1; Source PDF section: 304-9991 AIR COMPRESSOR GP | Request a Quote |
| — | 2M-9780 | 2M9780 | 1 | SEAL-O-RING (19.18-MM ID) | Graphic ref.: 1; Product level: 2; Source PDF section: 304-9991 AIR COMPRESSOR GP | Request a Quote |
| 3 | 6V-5221 | 6V5221 | 4 | BOLT (M8X1.25X80-MM) | Original note flags: M; Graphic ref.: 1; Product level: 1; Source PDF section: 304-9991 AIR COMPRESSOR GP | Request a Quote |
| 4 | 8T-0267 | 8T0267 | 4 | BOLT-SOCKET HEAD (M6X1X12-MM) | Original note flags: M; Graphic ref.: 1; Product level: 1; Source PDF section: 304-9991 AIR COMPRESSOR GP | Request a Quote |
| 5 | 9M-1974 | 9M1974 | 4 | WASHER-HARD (8.8X16X2-MM THK) | Graphic ref.: 1; Product level: 1; Source PDF section: 304-9991 AIR COMPRESSOR GP | Request a Quote |
| — | 217-5232 | 2175232 | 1 | KIT-GASKET (AIR COMPRESSOR) (INCLUDES INLET REED VALVE/GASKET & CYLINDER HEAD GASKETS) | Product level: 1; Source PDF section: 304-9991 AIR COMPRESSOR GP | Request a Quote |
| — | 260-6821 | 2606821 | 1 | KIT-SEAL (AIR COMPRESSOR) (INCLUDES 0-RING (END COVER), CRANKCASE COVER GASKETS, REAR COVER GASKET, & INSTRUCTION SHEET) | Product level: 1; Source PDF section: 304-9991 AIR COMPRESSOR GP | Request a Quote |
| — | 335-6328 | 3356328 | 1 | KIT-UNLOADER (AIR COMPRESSOR) (INCLUDES UNLOADER CAP GASKET, ESS BALANCE PISTON, ESS SPRING, ESS PISTON, & TOP, MIDDLE, & BOTTOM O-RINGS) | Product level: 1; Source PDF section: 304-9991 AIR COMPRESSOR GP | Request a Quote |
| — | 329-0223 | 3290223 | 1 | KIT-HEAD (AIR COMPRESSOR) (INCLUDES CYLINDER HEAD AS, INLET REED/ GASKET, CYLINDER HEAD BOLTS, & INSTRUCTION SHEET) | Product level: 1; Source PDF section: 304-9991 AIR COMPRESSOR GP | Request a Quote |
Original PDF Table Notes
AVAILABLE REPAIR KIT(S):
M-METRIC PART
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Send the original part number, required quantity, Caterpillar C15 engine 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 C15 Industrial 346-1612 ENGINE AR-CORE Parts
- Caterpillar C15 Industrial 344-2359 ENGINE AR-CORE Parts
- Caterpillar C15 Industrial 327-2107 ENGINE AR-CORE Parts
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