Cummins - O-Ring Seal - 3028291
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The Cummins 3028291 O-Ring Seal is a replacement sealing ring used on compatible Cummins engine assemblies where this part number is specified. It helps seal the related component connection, preventing fluid leakage, pressure loss, and contamination after service or reassembly.
Key Features
- Replacement Cummins O-ring seal
- Used where 3028291 is specified in the Cummins parts breakdown
- Helps seal oil, coolant, fuel, air, or water passages depending on application
- Service part for maintenance, rebuilds, and component repairs
- Recommended whenever the related component is removed
Engine Compatibility
For Cummins engine applications that call for O-ring seal 3028291. Confirm fitment by engine model, component assembly, and original parts diagram before ordering.
Serial Number Fitment Notice
Cummins O-rings can vary by diameter, thickness, material, and sealing location. Always verify against the engine serial number or parts manual before installation.
When This Part Needs Replacement
Replace this seal if it is flattened, swollen, cracked, brittle, cut, leaking, or disturbed during component removal. Reusing an old O-ring can cause repeat leaks after reassembly.
Installation Notes
Clean the groove and mating surface before installation. Lightly lubricate the O-ring with the correct service fluid when required, seat it evenly, and avoid twisting, stretching, or pinching during assembly.
Alternate/Superseded Part Numbers
- 3028291
Parts Desk Insight
Cummins O-rings are best matched by exact part number and assembly location. A seal that looks close can still have the wrong cross-section or material for the application.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.