Match the part number, measurements and connection points that apply to your trailer.
| Part Number | Match the number stamped on the original bearing or seal. |
|---|---|
| Dimensions | Measure the mating surfaces when a number is unavailable. |
| Hub / Axle | Use capacity as context, not as the only fitment check. |
Complete bearing, race, oil seal, washer, spindle nut, and cotter pin service kit for compatible 10K trailer axle hub applications. Match bearing numbers, race numbers, seal dimensions, and spindle-end hardware before ordering.
| Specification | Detail |
|---|---|
| Part Number / SKU | BK4-287-LIPPERT |
| Product Type | 10K trailer axle bearing, race, oil seal, and spindle end hardware kit |
| Bearings Included | 25580 bearing and 387A bearing |
| Races Included | 25520 race and 382A race |
| Oil Seal Included | 7700081 oil seal, 2.875" x 3.88" |
| Quantity Included | One complete service kit as listed below |
| Category | Details |
|---|---|
| System | Compatible 10K trailer axle hub and spindle service applications |
| Primary Fit | Lippert-style 10K applications where all listed bearing, race, seal, and spindle-end hardware specifications match |
| Fitment Method | Verify by existing bearing numbers, race numbers, seal size, spindle washer size, spindle nut thread, and cotter pin size |
| Important Note | Do not order by axle rating alone. Hub, spindle, seal, and nut configurations can vary across 10K axle assemblies. |
| Feature | Buyer Benefit |
|---|---|
| Complete Hub Service Kit | Includes bearings, races, oil seal, washer, spindle nut, and cotter pin for one hub service application. |
| Matched Bearing & Race Numbers | 25580 pairs with 25520; 387A pairs with 382A. |
| Spindle End Hardware Included | Includes washer, spindle nut, and cotter pin so the service hardware can be refreshed during installation. |
| 10K Trailer Application | Built for compatible heavy-duty 10K axle hub service where the listed measurements match. |
This BK4-287-LIPPERT bearing kit is a curated 10K trailer hub service kit that includes the bearing cones, matching races, oil seal, spindle washer, spindle nut, and cotter pin commonly needed during hub service. It is intended for compatible Lippert-style 10K applications where the existing hub and spindle match the included bearing numbers, seal dimensions, and spindle-end hardware specifications.
Bearing kits should be matched by the numbers stamped on the existing bearings and races whenever possible. Axle capacity is helpful, but it is not enough by itself because hubs and spindle hardware can vary.
Compatibility: Designed for compatible 10K trailer axle hub service applications where the bearing, race, seal, washer, spindle nut, and cotter pin specifications match the existing assembly.
Vehicle / System Fit: Commonly used for heavy-duty trailer hub service on compatible 10K axle setups. Verify before ordering by part number and measurement, not by axle rating alone.
Installation Notes: Replace races with their matching bearing cones, lubricate bearings properly, inspect spindle condition, and confirm the seal rides on the correct surface before final assembly.
Performance Insight: Using a complete service kit helps refresh the wear components normally addressed during hub service rather than replacing only one bearing or seal at a time.
Selling Brand: R&P Carriages curated service kit
Application Reference: Lippert, LCI, AL-KO, Hayes, Dexter, and 10K axle references are application and compatibility references only where the listed measurements and part numbers match.
What This Means: This listing is for a curated bearing, race, oil seal, and spindle hardware kit, not a guaranteed OEM-branded package unless specifically stated on the product label or packaging.
Before Ordering: Verify bearing numbers, race numbers, seal size, spindle washer dimensions, spindle nut thread, cotter pin size, axle application, and hub/spindle configuration before installation.
When servicing a heavy-duty hub, take time to inspect the spindle, hub bore, races, seal surface, and hardware condition. A new kit will not correct a damaged spindle, spun race, incorrect seal surface, or mismatched hub assembly.
Includes one 25580 bearing with 1.75" inside diameter, paired with the included 25520 race.
Includes one 387A bearing with 2.25" inside diameter, paired with the included 382A race.
Includes one 7700081 oil seal measuring 2.875" x 3.88" for compatible 10K hub applications.
Includes spindle washer, 6-slot spindle nut, and cotter pin for compatible spindle-end service.
| Quantity | Item | Details |
|---|---|---|
| 1 | 25580 Bearing | 1.75" ID; fits 25520 race; used in compatible 12" drum / large hub applications where measurements match |
| 1 | 25520 Race | 3.265" OD; matching race for 25580 bearing |
| 1 | 387A Bearing | 2.25" ID; fits 382A race; used in compatible 10K GD-style applications where measurements match |
| 1 | 382A Race | 3.813" OD; matching race for 387A bearing |
| 1 | 7700081 Oil Seal | 2.875" x 3.88"; fitment must be verified against existing seal and hub/spindle dimensions |
| 1 | 181895 Lippert / LCI Spindle Washer | 1-3/4" ID; 3-3/8" OD; round washer |
| 1 | 006-239-00 Spindle Nut | AL-KO style spindle nut; 1 1/2-12 UNF-2B; 6-slot; verify thread and spindle application before ordering |
| 1 | 181899 Lippert / LCI Cotter Pin | 1/4" x 2-1/2" |
