321397 Mack / Volvo O-Ring
Used In These Kits
This part is included in 5 engine & overhaul kits — find yours below.
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 | Mack · Volvo |
| Condition | New |
| Stage / Tier | Standard |
O-RING
PAI Part #: 321397
OEM References:
- CATERPILLAR 5D9344
- CATERPILLAR 8T8180
- MACK 20974222
- MACK 22685789
- MACK 56AX608
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 |
|---|
| 5D9344 |
| 8T8180 |
| 20974222 |
| 22685789 |
| 56AX608 |
| CATERPILLAR 5D9344 |
| CATERPILLAR 8T8180 |
| MACK 20974222 |
| MACK 22685789 |
| MACK 56AX608 |
| PAI 321397 |
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.