10K Short Spindle Lippert Hub/Drum Kit – Oil Bath – 8 on 6.5" – 791399-KIT
A complete oil-bath hub and drum kit for one wheel position on compatible 10,000 lb short-spindle Lippert and Dexter axles, including bearings, seal, oil cap, and lug nuts for a ready-to-service setup.
Overview
The 791399-KIT is a complete 10,000 lb rated oil-bath hub and drum assembly designed for Lippert and Dexter 10K short-spindle axles. This kit services one wheel position and includes installed bearing races, inner and outer bearings, oil seal, thread-on aluminum oil cap with sight glass, and eight lug nuts.
Designed for 12-1/4" × 3-3/8" electric or hydraulic brake assemblies and the standard 8 on 6-1/2" bolt pattern. The drum is machined and balanced to support consistent braking performance.
R&P Service Insight
Oil-bath hub and drum assemblies like this are typically replaced because of wear, seal failure, bearing damage, or service mismatch rather than a single sudden event.
- Wear: Bearing surfaces, seal contact points, and drum braking surfaces all wear over time under heavy axle loads.
- Exposure: Oil contamination, water intrusion, and heat buildup can shorten service life if the hub is run with improper lubricant level.
- Load Stress: High-capacity trailer use places continuous stress on bearings, races, and braking surfaces, especially if fitment is not matched to the correct spindle type.
R&P Knowledge Hub
10K short-spindle axles use a specific oil-bath hub configuration that differs from grease-packed systems. Oil-bath hubs use a sealed cap with sight glass to maintain proper lubricant level and cooling under heavy loads. This kit fits short 5" 10K spindles using 387A inner and 25580 outer bearings.
It will not fit long-spindle 10K axles or grease-type hubs. Always confirm spindle type, brake size (12-1/4" × 3-3/8"), and bearing numbers before ordering.
Features
10K Short-Spindle Fit
Built for compatible 10,000 lb Lippert and Dexter oil-bath axles using the short 5" spindle style.
Machined and Balanced Drum
Hub and drum assembly is machined and balanced to support smooth, consistent braking performance.
Service Kit Included
Comes with installed races, inner and outer bearings, oil seal, oil cap, and eight lug nuts.
Brake Compatibility
Designed for 12-1/4" × 3-3/8" electric or hydraulic brake assemblies with 8 on 6-1/2" wheel fitment.
Specifications
| Specification | Detail |
|---|---|
| Part Number | 791399-KIT |
| Axle Rating | 10,000 lb (Oil Bath) |
| Brake Compatibility | 12-1/4" × 3-3/8" (Electric or Hydraulic) |
| Bolt Pattern | 8 on 6-1/2" |
| Hub Pilot Diameter | 4.75" |
| Spindle Type | Short 10K (5" Spindle) |
| Inner Bearing | 387A (2.250" I.D.) |
| Outer Bearing | 25580 (1.750" I.D.) |
| Races (Installed) | 382A / 25520 |
| Oil Seal | 10-51 (2.875" I.D. × 3.880" O.D.) |
| Oil Cap | Thread-On Aluminum with Sight Glass |
| Lug Nuts | 8 Included (5/8-18 Thread) |
| Approximate Weight | 65 lb (Per Assembly) |
Includes
| Quantity | Item |
|---|---|
| 1 | Hub/Drum Assembly with Installed Races |
| 1 | Inner Bearing 387A |
| 1 | Outer Bearing 25580 |
| 1 | Oil Seal 10-51 |
| 1 | Thread-On Oil Cap |
| 8 | Lug Nuts |
