O-ring
Case Construction ·14 Fitments
| Machine | Model | Years |
|---|---|---|
| 4 CYLINDER DIESEL ENGINE | 207 | 1975 – 1980 |
| DIESEL ENGINE SUPPLEMENT | 207 | 1975 – 1980 |
| CASE CRAWLER TRACTOR (S/N 3060306 & AFTER) | 450 | 1975 – 1980 |
| CASE CRAWLER TRACTOR | 450B | 1978 – 1983 |
| CASE CRAWLER TRACTOR | 455B | 1983 |
| CASE CONSTRUCTION KING TRACTOR W/SHUTTLE TRANSMISSION | 580B | 1971 – 1977 |
| CASE CONSTRUCTION KING LOADER BACKHOE | 580C | 1975 – 1980 |
| CASE CONSTRUCTION KING LOADER BACKHOE | 580D | 1980 – 1984 |
| CASE SUPER-D CONSTRUCTION KING LOADER BACKHOE | 580SD | 1980 – 1984 |
| CASE CONSTRUCTION KING FORKLIFT | 584C | 1979 – 1988 |
Product Overview
The A51916 o-ring helps seal mating surfaces to prevent leakage under pressure, supporting dependable operation in Case equipment. This part maintains alignment and reduces the need for frequent service.
Key Features
- Part Number: A51916
- Diagram Reference Number: 2
- Package Quantity: 1
Product Specifications
- Package Weight: 0.013 lbs
- Package Length: 4.488 in
- Package Width: 3.74 in
- Package Height: 0.394 in
- Related Parts: IC:A50975, IC:A44083
Compatible equipment
This part fits 4 CYLINDER DIESEL ENGINE, DIESEL ENGINE SUPPLEMENT, CASE CRAWLER TRACTOR (S/N 3060306 & AFTER), CASE CRAWLER TRACTOR, CASE CONSTRUCTION KING TRACTOR W/SHUTTLE TRANSMISSION, CASE CONSTRUCTION KING LOADER BACKHOE, CASE SUPER-D CONSTRUCTION KING LOADER BACKHOE, CASE CONSTRUCTION KING FORKLIFT, TRENCHER - CASE 207 DIESEL ENGINE, CASE UNIT LOADER including models 207, 450, 450B, 455B, 580B, 580C, 580D, 580SD, 584C, 585C, 586C, DH5, W11.
Frequently asked questions
What is the part number?
The manufacturer part number is A51916.
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
- A51916
- Internal SKU
- IC:A51916
- 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 14 fitments
| Machine | Model | Years |
|---|---|---|
| 4 CYLINDER DIESEL ENGINE | 207 | 1975 – 1980 |
| DIESEL ENGINE SUPPLEMENT | 207 | 1975 – 1980 |
| CASE CRAWLER TRACTOR (S/N 3060306 & AFTER) | 450 | 1975 – 1980 |
| CASE CRAWLER TRACTOR | 450B | 1978 – 1983 |
| CASE CRAWLER TRACTOR | 455B | 1983 |
| CASE CONSTRUCTION KING TRACTOR W/SHUTTLE TRANSMISSION | 580B | 1971 – 1977 |
| CASE CONSTRUCTION KING LOADER BACKHOE | 580C | 1975 – 1980 |
| CASE CONSTRUCTION KING LOADER BACKHOE | 580D | 1980 – 1984 |
| CASE SUPER-D CONSTRUCTION KING LOADER BACKHOE | 580SD | 1980 – 1984 |
| CASE CONSTRUCTION KING FORKLIFT | 584C | 1979 – 1988 |
| CASE CONSTRUCTION KING FORKLIFT | 585C | 1979 – 1988 |
| CASE CONSTRUCTION KING FORKLIFT | 586C | 1979 – 1988 |
| TRENCHER - CASE 207 DIESEL ENGINE | DH5 | 1977 – 1980 |
| CASE UNIT LOADER | W11 | 1983 |