Lippert 3500 lb Axle Beam – 89" Hub Face – 3" HD Tube – 4" Drop – EZ Lube – Loose Perches
3500 lb drop trailer axle beam kit with 89" hub face, heavy-duty 3" tube, EZ Lube spindles, and loose spring perches for final weld-on installation.
Overview
This Lippert 3500 lb trailer axle beam is built for replacement axle applications where the 89" hub face, 3" heavy-duty tube, drop configuration, spindle setup, and spring-center layout match the trailer being serviced. This is a -KIT style axle listing with spring perches included loose, allowing the final perch position to be set to the trailer’s required Spring Center before welding.
R&P Service Insight
Drop axle replacement is measurement-sensitive. Before ordering or installing, match the hub face, brake flange spacing, spindle style, drop orientation, and required Spring Center to the trailer.
- Hub Face: 89" hub face helps determine the trailer wheel track width.
- Drop Beam: The 4" drop changes ride height compared with a straight axle and must match the trailer’s intended suspension setup.
- Loose Perches: Included spring perches are not pre-welded and must be correctly positioned and welded before use.
R&P Knowledge Hub
Compatibility: Commonly used on utility trailers and campers configured for 3500 lb axle applications where the axle length, drop, spindle, brake flange, and spring-center measurements match.
Trailer System Fit: Designed for 3500 lb trailer axle replacement applications using EZ Lube spindles and compatible 5-lug hub or 10" electric brake setups where dimensions match.
Installation Notes: Verify hub face, brake flange-to-flange, bearing shoulder-to-shoulder, spindle end-to-end, axle tube size, spring-center measurement, and perch welding requirements before installation.
Performance Insight: The 3" heavy-duty tube provides a larger tube profile than many standard 3500 lb axle beams, but the perch profile and weld setup still need to be verified before the axle is placed into service.
Brand & Fitment Note
Selling Brand: R&P Carriages / Lippert axle beam listing.
Application Reference: Trailer, camper, hub, brake, bearing, and spindle references in this listing describe compatibility targets only where the customer’s measurements and configuration match.
What This Means: This listing is for a 3500 lb drop axle beam kit with loose spring perches. Included perches do not mean welded perches.
Before Ordering: Verify all measurements, axle capacity, tube size, drop, spring-center requirement, hub and brake compatibility, and included components before installation.
R&P Repair Insight
A trailer axle should not be chosen by capacity alone. The axle needs to match the trailer’s physical geometry so the wheels, springs, brakes, and frame all remain in proper alignment.
- Check the Drop: Confirm the trailer needs a 4" drop axle rather than a straight axle or different drop height.
- Check the Spring Center: Since this kit ships with loose perches, the Spring Center must be measured before welding.
- Check Hub and Brake Match: This axle uses L44649 and L68149 bearing applications with 10-19 grease seal applications when matched to compatible hubs. Hubs, bearings, seals, and brakes are not included unless separately stated.
Features
3500 lb Drop Axle Beam
Replacement axle beam for compatible 3500 lb trailer applications requiring an 89" hub face and 4" drop configuration.
3" Heavy-Duty Tube
Built with a heavy-duty 3" axle tube profile. Verify tube and perch compatibility before welding spring perches.
EZ Lube Spindle Setup
EZ Lube spindle configuration supports easier hub service when used with compatible hubs, bearings, and seals.
Loose Perches Included
Spring perches are included loose for final weld-on placement based on the trailer’s Spring Center measurement.
Specifications
| Specification | Detail |
|---|---|
| Part Number | 3500-89-3-D-KIT |
| Brand | Lippert / R&P Carriages listing |
| Product Type | Trailer axle beam drop kit |
| Capacity | 3500 lb |
| Hub Face | 89" |
| Tube Size | 3" heavy-duty axle tube |
| Drop | 4" drop |
| Spindle Type | EZ Lube |
| Brake Flange to Flange | 82.66" |
| Bearing Shoulder to Shoulder | 85.19" |
| Spindle End to End | 93.38" |
| Bearing / Seal Application | Uses L44649 and L68149 bearing applications with 10-19 grease seal applications when matched to compatible hubs. Bearings, seals, hubs, and brakes are not included. |
Fitment / Application
| Category | Details |
|---|---|
| Trailer Type | Utility trailers, campers, and similar 3500 lb trailer axle applications where measurements match. |
| Primary Fit | Trailers requiring an 89" hub face, 4" drop, 3" tube, EZ Lube spindle axle beam. |
| Common Deck Width Context | Common replacement axle for trailers or campers with approximately 71" to 77" floor deck width, but actual axle measurements must be verified. |
| Perch Requirement | Spring perches ship loose by default and must be positioned to the correct Spring Center and welded before the axle is used. |
| Notes | Do not order by trailer capacity alone. Match hub face, drop, brake flange, spindle, tube size, spring-center, and hub/brake compatibility before installation. |
Included Components
| Quantity | Item |
|---|---|
| 1 | Lippert 3500 lb bare trailer axle beam, 89" hub face, 3" heavy-duty tube, 4" drop, EZ Lube spindle configuration |
| 2 | Loose spring perches / spring seats for final weld-on installation |
| Not Included | Hubs, drums, brakes, bearings, seals, U-bolts, tie plates, mounting hardware, and welding service unless separately confirmed before shipment. |
What Comes in the -KIT: Spring Perches Are Included Loose
This -KIT includes the axle beam and loose spring perches / spring seats. The spring perches are included as separate pieces. Included does not mean welded.
Spring perches ship loose by default. They are not welded to the axle tube before shipment unless the customer specifically requests perch welding in the order notes, provides the correct Spring Center measurement, and R&P confirms the weld-on request before the axle ships.
Repetition matters: If the listing says “spring perches included,” that means loose spring perches are included with the kit. It does not mean the spring perches are already installed, welded, or ready for towing.
When Will R&P Weld the Spring Perches?
R&P may weld the spring perches before shipment only when the order clearly gives us the information needed to do it correctly.
- The customer must request welded spring perches in the order notes.
- The customer must provide the Spring Center measurement.
- R&P must confirm the weld-on request before shipment.
How to Find Your Spring Center Measurement
Spring Center is the distance from the center of one leaf spring to the center of the opposite leaf spring. This is the measurement used to locate where the spring perches need to be welded on the axle tube.
- Best method with old axle: Measure from the center of one existing spring perch / spring seat to the center of the opposite spring perch / spring seat.
- Best method from the trailer: Measure from the centerline of the left leaf spring pack to the centerline of the right leaf spring pack where the axle sits.
- Leaf spring center bolt method: Measure from the center of the center bolt / locating pin on one spring pack to the center of the center bolt / locating pin on the other spring pack.
- Do not measure outside-to-outside. Spring Center is a center-to-center measurement.
- Do not guess from deck width. Deck width can be helpful context, but it is not a substitute for the actual Spring Center measurement.
Axle Measurement Diagram
Use the axle measurement diagram below as a visual reference while confirming axle dimensions and installation details. Spring Center must still be measured center-to-center at the trailer’s leaf springs or existing spring perches.
Why Welding the Perches Matters
This image shows a real-world installation problem where loose spring perches were not welded before use and brake wiring was torn out. This is exactly why the axle must not be installed, towed, or placed into service while the spring perches are still loose.
Loose perches can allow the axle to move or rotate out of its intended installed position. That can damage brake wiring, brake components, suspension parts, tires, and the trailer. The perches must be properly welded before road use.
| Question | Answer |
|---|---|
| Are spring perches included in the -KIT? | Yes. The spring perches / spring seats are included as loose parts. |
| Are the spring perches welded on by default? | No. They ship loose by default. |
| Can R&P weld the perches before shipping? | Only if the customer requests it in the order notes, provides the correct Spring Center measurement, and R&P confirms the request before shipment. |
| What measurement is needed for welding? | Spring Center: center of one leaf spring / spring perch to the center of the opposite leaf spring / spring perch. |
| Can the axle be used with loose perches? | No. Do not install, tow, or place the axle in service until the perches are properly welded. |
| What can happen if perches are not welded? | Loose perches can allow the axle to move or rotate, which can damage brake wiring, brake parts, suspension components, tires, and the trailer. |
| Which way does camber face? | If the axle is cambered, the arch goes up in the middle when installed. |
| Does the perch need to match the axle tube? | Yes. Confirm the supplied perch profile matches the 3" axle tube before welding. |
Order Note Wording Customers Can Use
Customers who want R&P to weld the spring perches should put clear instructions in the order notes before checkout.
