Trailer Axle Bearing Kit / 10K General Duty Oil Bath Hub Service
10,000 lb Bearing Kit for Pre-2009 Dexter 10K General Duty Oil Bath Axles
Curated bearing, race, seal, and oil cap service kit for compatible old-style Dexter 10K General Duty oil bath hub applications. Built for one hub service position where the listed component numbers, seal size, drum reference, and 21-36 oil cap style match your existing parts. Replacement Trailer Bearing Kit fits Dexter 10K GD 10-51 Seal Axle 8-288 9-44
Part Number: BK-944-GD 10K General Duty Oil Bath 9-44 / 12-1/4" x 3-3/8" Drum Reference
Overview
This R&P Carriages BK-944-GD bearing kit is assembled for compatible Dexter-style 10,000 lb General Duty oil bath axle hubs used with 12-1/4" x 3-3/8" brake drum applications. It is commonly referenced for pre-2009 10K GD hub and hub/drum assemblies including 8-214, 8-288, 8-339, and 8-415, and for applications associated with 9-44 drum references. Use this kit when replacing the bearing cones, races, oil seal, and oil cap components on a matching 10K General Duty oil-bath hub.
R&P Service Insight
On 10K trailer axles, the words “10K” alone are not enough to identify the correct hub service parts. General Duty and Heavy Duty axle families can use different bearing and seal combinations, so the safest fit check is always the part numbers and measurements from the hub being serviced.
-
One-Hub Service: This kit services one compatible hub position with one of each listed service component.
-
Oil Bath Application: Intended for compatible oil-lubricated hubs using the old-style 21-36 oil cap arrangement.
-
Fitment Control: Confirm the 25580 / 25520 and 387A / 382A bearing and race families before installation.
R&P Knowledge Hub
Compatibility: Designed for compatible pre-2009 Dexter 10K General Duty oil bath axle applications where the existing hub uses the listed 25580 outer bearing, 25520 outer race, 387A inner bearing, 382A inner race, 3.880" x 2.875" oil seal, and 21-36 oil cap style.
Vehicle / System Fit: Heavy trailer oil bath hub service for 10K General Duty axle assemblies with matching hub, drum, bearing, race, seal, and cap references.
Installation Notes: Compare the bearing cone markings, race markings, oil seal dimensions, oil cap style, and hub/drum reference numbers before ordering or installing. Do not order by axle capacity alone.
Performance Insight: Replacing bearings, races, the oil seal, and cap components together helps reduce the chance of reusing worn sealing parts or damaged bearing contact surfaces during hub service.
Brand & Fitment Note
Selling Brand: R&P Carriages curated service kit.
Application Reference: Dexter names, hub numbers, drum numbers, and component references in this listing describe compatibility, fitment target, or application style only where supported by matching component numbers, dimensions, and configuration details.
What This Means: This listing is for an R&P Carriages BK-944-GD bearing replacement kit assembled for compatible Dexter-style 10K General Duty applications. It is not being sold as a guaranteed Dexter OEM-branded kit unless specifically stated and verified.
Before Ordering: Verify axle series, hub style, drum reference, oil cap size, bearing numbers, race numbers, seal dimensions, and whether the axle is General Duty or Heavy Duty.
R&P Repair Insight
Oil bath hub service should include a close inspection of the seal journal, cap sealing surface, bearing race seats, and oil condition. A correct bearing set can still leak or fail early if the wrong seal or cap style is installed, or if a worn race is reused with a new bearing cone.
-
Hub Number Check: Match your hub or hub/drum assembly to the listed application references, including 8-214, 8-288, 8-339, or 8-415 where applicable.
-
Drum Reference Check: Commonly paired with 9-44 / 12-1/4" x 3-3/8" brake drum applications; verify the drum reference before ordering.
-
General Duty Warning: Use only on compatible 10K General Duty applications. Do not assume fitment on 10K Heavy Duty axles.
Features
Curated 10K GD Service Kit
Assembled for compatible 10,000 lb General Duty oil bath hub applications where the listed bearing, race, seal, and cap components match the original hub parts.
Includes Bearing Cones and Races
Includes the 25580 / 25520 and 387A / 382A bearing and race families commonly associated with matching 9K-10K General Duty hub service.
Old-Style Oil Cap Components
Includes a 4" 21-36 style oil bath cap, cap O-ring, and plug insert for compatible old-style oil bath hub applications.
Clear Fitment Targets
Built around the supplied pre-2009 10K GD application references, including 8-214, 8-288, 8-339, 8-415, and 9-44 drum-style applications where all match points verify.
Specifications
| Specification |
Detail |
| Part Number |
BK-944-GD |
| Brand |
R&P Carriages |
| Product Type |
Bearing replacement kit / oil bath hub service kit |
| Application |
Compatible pre-2009 Dexter-style 10K General Duty oil bath axle hubs |
| Brake Drum Reference |
9-44 / 12-1/4" x 3-3/8" drum applications where matching |
| Oil Cap Style |
4" oil bath cap, 21-36 / 021-036 style reference |
| Oil Seal Size |
3.880" OD x 2.875" ID, 10-51 style reference |
| Bearing / Race Families |
25580 / 25520 and 387A / 382A style components |
| Quantity |
One kit with one of each listed component |
Fitment / Application
| Category |
Details |
| Vehicle / System |
Heavy trailer oil bath hub and hub/drum assembly |
| Primary Fit |
Pre-2009 10,000 lb Dexter General Duty oil bath axle applications where all component references match |
| Hub / Hub-Drum References |
8-214, 8-288, 8-339, and 8-415 application references where matching |
| Drum Reference |
9-44, commonly associated with 12-1/4" x 3-3/8" brake drum applications |
| Important Note |
Verify your axle is General Duty, not Heavy Duty. Confirm original bearing, race, seal, and oil cap markings before installation. |
Bill of Materials / Included Components
| Quantity |
Component |
Part / Reference |
Service Role |
| 1 |
4" oil bath cap |
21-36 / 021-036 style reference |
Oil bath hub cap for compatible old-style 10K GD applications |
| 1 |
O-ring for cap |
Included |
Cap sealing component |
| 1 |
Plug insert for cap |
Included |
Oil cap plug insert |
| 1 |
Outer bearing cone |
25580, 1.750" ID reference |
Outer bearing position on compatible hub assemblies |
| 1 |
Outer race / bearing cup |
25520 |
Matching race for 25580 bearing family |
| 1 |
Inner bearing cone |
387A, 2.250" ID reference |
Inner bearing position on compatible hub assemblies |
| 1 |
Inner race / bearing cup |
382A |
Matching race for 387A bearing family |
| 1 |
Oil / grease seal |
10-51 style, 3.880" OD x 2.875" ID reference |
Hub oil seal for compatible oil bath applications |
Final Fitment Check: This kit is intended for compatible Dexter-style 10K General Duty oil bath axle applications using the listed 25580 / 25520 and 387A / 382A bearing and race families, 3.880" x 2.875" 10-51 style seal, and 21-36 style oil cap. Verify hub number, drum number, bearing markings, race markings, seal size, cap style, and General Duty axle configuration before installation. Do not assume fitment on 10K Heavy Duty axles.
BK-944-GD bearing kit, 10K General Duty bearing kit, Dexter 10K GD bearing kit, pre-2009 10K GD bearing kit, 9-44 drum bearing kit, 12-1/4 x 3-3/8 brake drum bearing kit, 8-214 bearing kit, 8-288 bearing kit, 8-339 bearing kit, 8-415 bearing kit, 25580 25520 387A 382A bearing race kit, 10-51 oil seal, 3.880 x 2.875 oil seal, 21-36 oil cap, oil bath axle bearing kit, 10000 lb trailer axle bearing replacement kit
