5 on 4.75 Trailer Brake Drum & 10" Left Hand Electric Backing Plate Kit
Left side trailer brake service kit for standard 3,500 lb #84 spindle axles using 10" electric brakes and a 5 on 4.75" wheel bolt pattern. Includes drum, left hand electric backing plate, bearings, seal, dust cap, and lug nuts.
Overview
This trailer brake drum and backing plate kit is built for the left hand side of compatible 3,500 lb trailer axle applications. It is a practical service solution for replacing a failed brake drum or left side electric backing plate, and it can also be used where the trailer is being set up with the listed 5 on 4.75" bolt pattern, #84 spindle bearing set, and 10" electric brake configuration.
R&P Service Insight
This kit groups the wear items that commonly matter during a drum and electric brake repair. The bearing races are already pressed into the drum, which helps reduce setup time during installation.
- Side Specific: This listing is for the left hand side only.
- Brake Size Match: Designed around a standard 10" electric trailer brake setup.
- Spindle Match: Intended for standard #84 spindle 3,500 lb axle applications using the listed L68149 inner bearing and L44649 outer bearing.
R&P Knowledge Hub
Compatibility: Compatible with many standard 3,500 lb trailer axle setups, including listed AL-KO, Dexter, Lippert, Axis, Quality, and similar applications where spindle, brake flange, brake size, and bolt pattern match.
Vehicle / System Fit: Trailer axle brake and hub/drum service applications using a standard #84 spindle, 10" electric brakes, and 5 on 4.75" wheel bolt pattern.
Installation Notes: Verify left hand orientation, 10" brake size, 4-bolt brake flange, #84 spindle bearing sizes, grease seal size, and 5 on 4.75" bolt pattern before ordering or installing.
Performance Insight: A matched drum and electric backing plate helps address braking wear at the wheel end instead of replacing only one worn component and leaving the rest of the brake assembly questionable.
Brand & Fitment Note
Selling Brand: R&P Carriages
Application Reference: AL-KO, Dexter, Lippert, Axis, Quality, and other axle names in this listing are used only as compatibility references for common trailer axle applications where measurements, mounting points, and configuration match.
What This Means: This listing is for a trailer brake drum and left hand electric backing plate service kit, not a guaranteed OEM-branded item unless specifically stated and verified.
Before Ordering: Verify bolt pattern, stud spacing, brake size, spindle type, bearing numbers, seal size, brake flange pattern, axle tube size, and left hand side orientation before installation.
R&P Repair Insight
Brake drums and backing plates need to match the axle and wheel-end setup. The most common ordering mistakes are choosing the wrong side, wrong bolt pattern, wrong spindle bearing set, or wrong axle capacity family.
- Left Side Check: This kit includes a left hand electric backing plate only. It is not a pair and does not include the right side.
- Bolt Pattern Check: This drum is 5 on 4.75". The supplied bolt-pattern note lists approximately 4-1/2" stud spacing for this pattern.
- Axle Size Check: Standard 3,500 lb trailer axles commonly use an axle tube around 2-1/4" outside diameter. A 2.75" tube usually indicates a larger 5,200 / 6,000 / 7,000 lb axle family. A 1-5/8" tube usually indicates a smaller 2,000 / 2,200 lb axle family.
Features
5 on 4.75" Brake Drum
New trailer brake drum with a 5-lug, 4.75" bolt circle for compatible wheel and axle setups.
Left Hand 10" Electric Backing Plate
Includes one new 10" electric backing plate for the left hand side only.
Bearing Races Already Installed
Bearing race cups are already pressed into the drum to help simplify wheel-end service preparation.
#84 Spindle Bearing Set
Includes L68149 inner bearing, L44649 outer bearing, and 10-19 grease seal for matching standard #84 spindle applications.
Specifications
| Specification | Detail |
|---|---|
| Part Number | 945475+10RVEBLH-KIT |
| Brand | R&P Carriages |
| Product Type | Trailer brake drum and electric backing plate service kit |
| Application | Standard 10" electric trailer brake applications on compatible 3,500 lb #84 spindle axles |
| Wheel Bolt Pattern | 5 on 4.75" bolt circle |
| Stud Spacing Note | Listed as 4-1/2" stud spacing for this 5-lug pattern measurement reference |
| Brake Size | 10" electric trailer brake |
| Side / Orientation | Left hand side only |
| Axle / Spindle Fit | Standard #84 spindle, 3,500 lb axle applications where dimensions match |
| Inner Bearing | L68149, 1-3/8" ID |
| Outer Bearing | L44649, 1-1/16" ID |
| Grease Seal | 10-19, 1-3/4" ID |
| Brake Flange | Requires compatible 4-hole brake mounting flange on the axle |
| Finish | Not specified in supplied product information |
Fitment / Application
| Category | Details |
|---|---|
| Vehicle / System | Trailer axle hub/drum and electric brake assembly |
| Primary Fit | 3,500 lb trailer axles using standard #84 spindle, 10" electric brakes, and 5 on 4.75" wheel bolt pattern |
| Common Application References | AL-KO, Dexter, Lippert, Axis, Quality, and similar axle applications where measurements and mounting points match |
| Brake Mounting Check | Axle should have a small square 4-hole brake mounting plate welded to the axle tube for the backing plate |
| Axle Tube Check | Typical 3,500 lb axle tube is about 2-1/4" OD. A 2.75" tube usually points to a larger 5,200 / 6,000 / 7,000 lb axle family. A 1-5/8" tube usually points to a smaller 2,000 / 2,200 lb axle family. |
| Notes | This kit is for the left side only. Confirm bolt pattern, bearing numbers, grease seal, brake size, brake flange, axle capacity, and side orientation before ordering. |
Included Components
| Quantity | Item |
|---|---|
| 1 | New brake drum, 5 on 4.75", with bearing race cups pressed in |
| 1 | New 10" electric backing plate, left hand side |
| 1 | Inner bearing L68149, 1-3/8" ID |
| 1 | Outer bearing L44649, 1-1/16" ID |
| 1 | Grease seal 10-19, 1-3/4" ID |
| 1 | New dust cap |
| 5 | New lug nuts |
