Cummins - Sealing Washer - 3755947
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You have 30 days to request a return. All sale items are final sale.
The Cummins 3755947 Sealing Washer is a replacement sealing washer used on Cummins assemblies where this exact part number is specified. It is designed to seal under a fastener, plug, banjo fitting, line connection, or service port depending on the engine application.
Key Features
- Genuine-style Cummins sealing washer
- Used where 3755947 is called out in the Cummins parts breakdown
- Helps prevent fluid seepage at the serviced connection
- Commonly replaced after removal because sealing washers can crush or deform
- Important for leak-free reassembly on fuel, oil, coolant, or pressure-related fittings
Engine Compatibility
For Cummins engines and assemblies that specify sealing washer 3755947. Confirm by engine serial number and the exact parts diagram location before ordering.
Serial Number Fitment Notice
Cummins sealing washers can vary by inside diameter, outside diameter, thickness, material, and crush style. Match by exact part number, engine serial number, and fitting location.
When This Part Needs Replacement
Replace this washer whenever the related fitting, plug, or fastener is removed, or if the existing washer is flattened, grooved, corroded, cracked, leaking, or no longer sealing properly.
Installation Notes
Clean the mating surfaces before installation. Install the washer in the correct location and torque the related fastener or fitting to the proper Cummins service specification. Do not reuse a crushed sealing washer on pressure or fluid connections.
Alternate/Superseded Part Numbers
- 3755947
Parts Desk Insight
Sealing washers are small, but they do the actual leak-prevention work at the joint. Reusing one after it has been crushed is a common cause of repeat seepage.
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.