Back-up Ring Washer
Case Construction ·20 Fitments
| Machine | Model | Years |
|---|---|---|
| WHEEL LOADER - TIER 4 (NA) | 1021F | 2011 – 2016 |
| WHEEL LOADER - TIER 4B (NA) | 1021G | 2016 – 2022 |
| WHEEL LOADER TIER 4 (NA) | 1121F | 2010 – 2016 |
| WHEEL LOADER - TIER 4B (NA) | 1121G | 2016 – 2022 |
| WHEEL LOADER TIER 3 (NA) | 521E | 2008 – 2013 |
| WHEEL LOADER - TIER 4 (NA) | 521F | 2012 – 2015 |
| WHEEL LOADER - TIER 4B (NA) | 521F | 2016 |
| WHEEL LOADER - TIER 4B (NA) | 521G | 2016 – 2022 |
| WHEEL LOADER TIER 3 (NA) | 621E | 2007 – 2012 |
| WHEEL LOADER - TIER 4 (NA) | 621F | 2012 – 2014 |
Enhance your heavy equipment’s performance with the Case Construction Back-Up Ring Washer #76303478. Designed for durability and precision, this essential part ensures optimal sealing and reliability, keeping your machinery running smoothly in demanding conditions. Perfect for maintenance and repairs. This product is a genuine OEM part, ensuring quality and reliability.
Compatible equipment
This part fits WHEEL LOADER - TIER 4 (NA), WHEEL LOADER - TIER 4B (NA), WHEEL LOADER TIER 4 (NA), WHEEL LOADER TIER 3 (NA), WHEEL LOADER - TIER 4 / TIER 2 (NA), WHEEL LOADER TIER 3 NA/EU, WHEEL LOADER TIER 3 (NA/EU) including models 1021F, 1021G, 1121F, 1121G, 521E, 521F, 521G, 621E, 621F, 721E, 721F, 821E, 821F, 921E, 921F.
Frequently asked questions
What is the part number?
The manufacturer part number is 76303478.
Is this a genuine OEM part?
Yes. Southeastern Equipment stocks OEM and quality aftermarket parts for heavy equipment. Contact us if you need a specific OEM source or aftermarket option.
Will this fit my machine?
See the compatible equipment list above. If your model is not listed, call us with your machine's serial number and we can confirm.
Where does this ship from?
Southeastern Equipment Company ships parts nationwide from our US warehouse. Orders placed before 2 PM ET typically ship same day.
- Manufacturer part number
- 76303478
- Internal SKU
- IC:76303478
- Brand
- CASE CONSTRUCTION
- Condition
- OEM, new
- Category
- Case Construction
- Weight
- 0.01 lb
Free pickup at any of our 17 branches across Ohio, Indiana, Michigan, and Kentucky. Select your preferred branch at checkout.
30-day no-fault returns. Bought the wrong part? Send it back for a full refund — no restocking fees, no minimums.
All 20 fitments
| Machine | Model | Years |
|---|---|---|
| WHEEL LOADER - TIER 4 (NA) | 1021F | 2011 – 2016 |
| WHEEL LOADER - TIER 4B (NA) | 1021G | 2016 – 2022 |
| WHEEL LOADER TIER 4 (NA) | 1121F | 2010 – 2016 |
| WHEEL LOADER - TIER 4B (NA) | 1121G | 2016 – 2022 |
| WHEEL LOADER TIER 3 (NA) | 521E | 2008 – 2013 |
| WHEEL LOADER - TIER 4 (NA) | 521F | 2012 – 2015 |
| WHEEL LOADER - TIER 4B (NA) | 521F | 2016 |
| WHEEL LOADER - TIER 4B (NA) | 521G | 2016 – 2022 |
| WHEEL LOADER TIER 3 (NA) | 621E | 2007 – 2012 |
| WHEEL LOADER - TIER 4 (NA) | 621F | 2012 – 2014 |
| WHEEL LOADER - TIER 4B (NA) | 621F | 2014 – 2016 |
| WHEEL LOADER TIER 3 (NA) | 721E | 2006 – 2011 |
| WHEEL LOADER - TIER 4 / TIER 2 (NA) | 721F | 2011 – 2016 |
| WHEEL LOADER - TIER 4B (NA) | 721F | 2015 – 2016 |
| WHEEL LOADER TIER 3 NA/EU | 821E | 2006 – 2011 |
| WHEEL LOADER - TIER 4 / TIER 2 (NA) | 821F | 2011 – 2014 |
| WHEEL LOADER - TIER 4B (NA) | 821F | 2014 – 2016 |
| WHEEL LOADER TIER 3 (NA/EU) | 921E | 2007 – 2011 |
| WHEEL LOADER - TIER 4 / TIER 2 (NA) | 921F | 2010 – 2013 |
| WHEEL LOADER - TIER 4B (NA) | 921F | 2014 – 2016 |