Cummins 3903463 Gear Housing Access Hole Cover
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
| Compatible equipment / model |
|---|
| Cummins engine applications specifically cataloged for access cover 3903463, including selected 4B / 6B / 6C / ISC families |
Product Overview
A missing or damaged access cover leaves the gear-housing service opening exposed to dirt, oil leakage and contamination.
Replacing the cover restores the removable closure used to seal the opening between service procedures.
Key Features & Performance
- Cummins reference 3903463
- Gear-housing access-hole cover
- Used across several Cummins diesel-engine families
- Removable maintenance access point
- Seal/O-ring condition should be checked during installation
Replaces / Cross-References
- 3903463
What Is Included
1 gear-housing access-hole cover.
Fitment Notes
Cummins identifies 3903463 as an access-hole cover. Verify engine/CPL and whether a separate seal or fastener is required for your application.
Frequently Asked Questions
Is this a genuine OEM part?
No, unless the product page specifically states otherwise. This listing is for a replacement, accessory, upgrade or repair component as described above. OE, Partslink and interchange numbers are provided for identification and fitment reference.
How should I verify fitment before ordering?
Match the year, model, engine, trim/body style, side or position, connector, mounting points and any reference numbers above against the original component. For industrial equipment, also verify the machine serial number or engine build/CPL when available.
Part Summary
Keywords: Cummins 3903463 Gear Housing Access Hole Cover, 3903463