Caterpillar O-Ring, PAI 321313 (OEM 8T9527), Pack of 5
Used In These Kits
This part is included in 3 engine & overhaul kits — find yours below.
Suggested Additional Parts
Commonly sold with this product. These parts are sold separately.
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331415Caterpillar 3406E/C15/C16/C18 Compressor Seal, PAI (OEM 1100004), Pack of 1 In stock -
340061Caterpillar 3406E / C15 / C16 Nut In stock -
321316Caterpillar O-Ring, PAI (OEM 1075769), Pack of 10 In stock -
336012PAI Rear Crankshaft Seal (Dry Clutch) for Caterpillar In stock -
131451International / Navistar HYDRAULIC PUMP COVER GASKET (Pack of 5) In stock
| Brand | PAI Industries |
| Part Category | Seals & O-Rings |
| Sub-Type | O-Ring |
| Engine Make | Caterpillar |
| Engine Model | 3400 · C15 · C16 · C18 |
| Condition | New |
| Stage / Tier | Standard |
Pack of 5.
PAI 321313 is an o-ring. PAI lists Viton material. The listed durometer is 75. Listed cross section is 0.139 inch. Listed inside diameter is 4.359 inches. The manufacturer designates product-level OEM 8T9527.
Compatible Engines
PAI lists Caterpillar 3400 Series; Caterpillar C15 Engine; Caterpillar C16 Engines; Caterpillar C18 Engine. Match the complete required part number and listed application before ordering.
Manufacturer product cross-references
Caterpillar 5W1849
Caterpillar 8T9527
Caterpillar 774091
Caterpillar 77-4091
Compare the complete part number, material and required seal specification before ordering.
PAI Part #: 321313
OEM References:
- CATERPILLAR 5W1849
- CATERPILLAR 8T9527
- CATERPILLAR 774091
- CATERPILLAR 77-4091
Applications:
- CATERPILLAR 3400 SERIES
- CATERPILLAR C15 ENGINE
- CATERPILLAR C16 ENGINES
- CATERPILLAR C18 ENGINE
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 |
|---|
| 5W1849 |
| 8T9527 |
| 774091 |
| 77-4091 |
| CATERPILLAR 5W1849 |
| CATERPILLAR 8T9527 |
| CATERPILLAR 774091 |
| CATERPILLAR 77-4091 |
| PAI 321313 |
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.