Cat 3406 Piston, PAI 311018 (OEM 7N3633), Pack of 1
Used In These Kits
This part is included in 1 engine & overhaul kits — find yours below.
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311019Caterpillar 3406 / 3400 Piston Kit 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 | Pistons, Rings & Rods |
| Sub-Type | Piston |
| Engine Make | Caterpillar |
| Engine Model | 3406 |
Pack of 1.
PAI 311018 is an aluminum piston for Caterpillar 3406 applications; PAI specifies 15:1 compression ratio and 5.40-inch bore. The manufacturer-designated reference is Caterpillar OEM 7N3633. This listing identifies the piston component; no additional assembly components are represented. PAI cross-references Caterpillar: 7N3510, 7N3633; Dana Corporation/Private Brand Sale: 224-3240X.
Match the complete part number and required application before ordering.
Fits:
- CATERPILLAR 3406 ENGINES
- CATERPILLAR 3400 SERIES
OEM cross-references:
- CATERPILLAR 7N3510
- CATERPILLAR 7N3633
- DANA CORPORATION/PRIVATE BRAND SALE 224-3240X
Warranty: 24 months
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 |
|---|
| CATERPILLAR 7N3510 |
| CATERPILLAR 7N3633 |
| DANA CORPORATION/PRIVATE BRAND SALE 224-3240X |
| PAI 311018 |
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.






