321257 Caterpillar 3400 O-Ring
Used In These Kits
This part is included in 8 engine & overhaul kits — find yours below.
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321380Caterpillar 3176 / C10 / C13 O-Ring Kit In stock -
321406Caterpillar 3176 / C10 / C13 O-Ring Kit In stock -
321407Caterpillar 3176 / C10 / C13 O-Ring Kit In stock -
331509Cat / Caterpillar C13 ENGINE O-RING KIT In stock -
331511Cat / Caterpillar FRONT GASKET KIT In stock -
331623Cat / Caterpillar C10 ENGINE OIL COOLER O-RING KIT In stock -
331713Cat / Caterpillar 3176 SERIES FRONT GASKET KIT In stock -
341308Cat / Caterpillar C13 ENGINE OIL PUMP 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 |
Cataloged cross-reference numbers for this product. Confirm fitment before ordering.
| Number |
|---|
| 5L2727 |
| 5P8068 |
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.