Dexter 8,000 lb Oil Bath Drum – 12.25" x 3.375" – 9/16" Stud – 8 Lug
Genuine Dexter 8,000 lb rated oil bath brake drum assembly measuring 12.25" x 3.375". Features 9/16" wheel studs and a 4.75" center pilot hole. Designed for heavy-duty 8K trailer axle applications using an oil bath lubrication system. This kit includes bearings, oil seal, and oil cap components for servicing one wheel position.
R&P Knowledge Hub
Oil bath hubs use gear oil instead of grease for lubrication. Proper oil level and seal integrity are critical to prevent contamination of brake components. Always verify spindle bearing numbers and seal dimensions before installation.
This drum uses inner bearing 25580 (1.75" I.D.) and outer bearing 02475 (1.25" I.D.). The included two-piece oil seal (3.38" O.D. x 2.25" I.D.) replaces common part number 10-63. Confirm compatibility with your specific 8K axle configuration.
Features
- Genuine Dexter 8K oil bath brake drum
- 12.25" x 3.375" drum size
- 9/16" wheel studs installed
- 4.75" pilot hole
- Designed for heavy-duty 8,000 lb trailer axles
Kit Includes
| Component | Description |
| Brake Drum | Dexter PN 8-285-9 – 12.25" x 3.375" |
| Inner Bearing | 25580 – 1.75" I.D. |
| Outer Bearing | 02475 – 1.25" I.D. |
| Oil Seal | 3.38" O.D. x 2.25" I.D. (two-piece, replaces 10-63) |
| Oil Cap Kit | 21-35 cap, 46-32 plug, 10-45 O-ring (K71-038-00) |
Specifications
| Specification | Detail |
| Axle Rating | 8,000 lb |
| Drum Size | 12.25" x 3.375" |
| Wheel Stud Size | 9/16" |
| Pilot Diameter | 4.75" |
| Inner Bearing | 25580 – 1.75" I.D. |
| Outer Bearing | 02475 – 1.25" I.D. |
Verify axle rating, bearing numbers, and seal dimensions before installation. This listing is for one complete oil bath drum assembly. Two are required to service one axle.
