Caterpillar 3400 Water Pump O-Ring Kit, PAI 321304 (OEM 2138621), Pack of 1
What’s In This Kit
Browse 5 included components with current product details and availability.
-
321278Caterpillar HNBR O-Ring, PAI (OEM 1090077), Pack of 5 In stock -
321303Caterpillar O-Ring, PAI (OEM 1565198), Pack of 5 In stock -
TGA-9914Cat / Caterpillar O-RING (Pack of 5) In stock -
331372Cat Water Connector Gasket, PAI (OEM 1250434), Pack of 5 In stock -
EGA-3061Cat / Caterpillar 3300 SERIES O-RING (Pack of 25) In stock - No included components match that search.
Used In These Kits
This part is included in 1 engine & overhaul kits — find yours below.
-
381801Cat / Caterpillar 3400 SERIES WATER PUMP ASSEMBLY In stock - No kits match that search.
Suggested Additional Parts
Commonly sold with this product. These parts are sold separately.
| Brand | PAI Industries |
| Part Category | Seals & O-Rings |
| Sub-Type | O-Ring |
| Engine Make | Caterpillar |
| Engine Model | 3400 |
| Condition | New |
| Stage / Tier | Standard |
Pack of 1.
PAI 321304 is a water pump o-ring kit. Manufacturer application: Caterpillar 3400. Manufacturer parent cross-references: CATERPILLAR 213-8621; CATERPILLAR 2138621.
Manufacturer application table: CATERPILLAR 3400 SERIES.
Manufacturer-listed top-level components: 1 x PAI 321278 o-ring; 1 x PAI 321303 o-ring; 1 x PAI TGA-9914 o-ring; 1 x PAI 331372 water connector gasket; 1 x PAI EGA-3061 o-ring. These component quantities do not change the Pack of 1 kit.
Compare the complete kit number, configuration and manufacturer-listed contents with the required parts before ordering.
PAI Part #: 321304
OEM References:
- Part Number OEM Number
- 321278 1090077
- 321303 1565198
- TGA-9914 330-3077
- 331372 1250434
- EGA-3061 8813-154129
Applications:
- CATERPILLAR 3400 SERIES
Warranty: 2.0 year(s)
These catalog references may identify this part or components in an assembly. A listed number alone does not confirm whole-assembly interchange or vehicle fitment. Confirm the required part before ordering.
| Number |
|---|
| 321278 1090077 |
| 321303 1565198 |
| TGA-9914 330-3077 |
| 331372 1250434 |
| EGA-3061 8813-154129 |
| PAI 321304 |
No cross-reference numbers match that search.
Discovery models are listed below. Confirm the complete application and any ESN/CPL or size restrictions before ordering.
Most PAI parts carry a 2-year unlimited-mileage PAI warranty — 3 years on the High Performance tier, 1 year on Excel by PAI. See Warranty & Returns for full coverage terms, or call a specialist to confirm the exact coverage on this part.
PAI published warranty tiers: High Performance — 3-Year · Genuine PAI — 2-Year · Excel — 1-Year, unlimited mileage. The badge beside the price shows this product's recorded term; when no badge is shown, confirm coverage with a specialist.