Marine Trailer Spindle Seal Repair System
Spindo Seal #5 Trailer Axle Spindle Repair Kit – 1.98" Seal OD – 5619U
Axle-wide spindle seal repair kit for select 2,000–2,200 lb marine trailer axles using L44649 bearings, a 1.25" original seal surface and a 1.98" seal bore. This kit will not fit a 1.50" seal surface.
Part Number: 5619U Spindo Seal Kit #5 Complete One-Axle Kit
Key Measurements & Specs
| Specification | Detail |
| Part Number / SKU | 5619U |
| Product Line | Spindo Seal |
| Kit Number | Kit #5 |
| Product Type | Trailer axle spindle seal repair sleeve kit |
| New Seal Outside Diameter | 1.98" |
| New Seal Inside Diameter | 1.375" |
| Original Seal Surface | 1.25" |
| Bearing Journal Size | 1.0625" / 1-1/16" |
| Wear Sleeve Inside Diameter | 1.319" |
| Wear Sleeve Material | Corrosion-resistant stainless steel |
| Quantity Included | One complete two-spindle axle kit |
Fitment / Application
| Category | Details |
| Trailer Application | Select marine and boat trailer axle applications |
| Axle Reference | Some 2,000–2,200 lb UFP, Reliable and similar axle configurations |
| Typical Inner Bearing | L44649 with a 1-1/16" bore |
| Required Seal Bore | 1.98" outside diameter |
| Required Original Seal Surface | 1.25" |
| Fitment Method | Verify the bearing number and physically measure both the hub seal bore and spindle seal surface |
| Will Not Fit | Spindles using a 1.50" seal surface |
| Important Note | This is an uncommon bearing and seal combination. Do not order by axle capacity alone. |
Top Features
| Feature | Buyer Benefit |
| Stainless Repair Surface | Creates a smooth sealing surface over a worn or damaged spindle shoulder |
| Axle-Wide Kit | Includes repair components for both spindle ends of one axle |
| O-Ring Sleeve Seal | Helps seal between each repair sleeve and the spindle surface |
| Replacement Neoprene Seals | Provides seals sized for the larger repair-sleeve surface |
| Measurement-Based Fitment | Clearly identifies the required bearing, seal bore and spindle shoulder sizes |
Overview
The Spindo Seal 5619U Kit #5 is designed to repair a worn or damaged grease-seal surface on select marine trailer axle spindles. Each stainless steel sleeve installs over the original 1.25" seal area, creating a smooth 1.375" surface for the included replacement seal. The complete kit services both spindle ends of one axle.
R&P Service Insight
This repair system is intended for a specific and relatively uncommon spindle configuration. Confirm all three critical measurements before disassembling the hub or ordering replacement components.
-
Bearing Check: Confirm the inner bearing is L44649 with a 1-1/16" bore.
-
Seal Bore Check: Confirm the hub accepts a 1.98" outside-diameter seal.
-
Spindle Check: Confirm the original seal shoulder measures 1.25", not 1.50".
R&P Knowledge Hub
Compatibility: Intended for select marine trailer axles using L44649 bearings, a 1.25" original spindle seal surface and a 1.98" hub seal bore.
System Fit: Commonly associated with some 2,000–2,200 lb UFP, Reliable and similar marine axle configurations. Application references do not guarantee fitment.
Installation Notes: Clean the spindle thoroughly and inspect the bearing journals before installation. The O-ring seals beneath the stainless sleeve, and the included 1.375" ID seal rides on the new repair surface.
Performance Insight: A smooth stainless sealing surface can address grease leakage caused by grooves, corrosion or wear where the original seal contacts the spindle.
Brand & Fitment Note
Product Identification: Spindo Seal Kit #5, part number 5619U.
Application References: UFP and Reliable names are used only to identify known axle applications where the listed measurements match.
What This Means: This listing is for one Spindo Seal spindle repair kit containing components for both ends of one axle. It is not represented as a complete hub, bearing or axle assembly.
Before Ordering: Verify the bearing number, bearing journal diameter, original spindle seal-surface diameter, hub seal bore and included-component requirements.
R&P Repair Insight
Replacing only the grease seal may not correct leakage when the spindle shoulder is grooved, pitted or corroded. This kit covers the original seal area with a new stainless surface and uses a larger replacement seal sized for that sleeve.
-
Inspect the Old Surface: Look for grooves, rust, pitting or an uneven contact area where the old seal rode.
-
Measure the Shoulder: The repair sleeve has a 1.319" inside diameter and is intended to fit over the specified 1.25" seal area.
-
Avoid the Common Mismatch: A 1.50" seal shoulder is larger than this sleeve and is not compatible with Kit #5.
Critical Fitment Warning
This is not the common 1.50" seal-surface configuration.
Many standard 2,000–2,200 lb trailer axles also use L44649 bearings but have a 1.50" spindle seal area. The bearing number by itself is therefore not enough to determine compatibility.
- Required bearing bore: 1-1/16"
- Required original seal surface: 1.25"
- Required hub seal bore: 1.98"
- Not compatible with a 1.50" spindle seal surface
Features
Smooth Stainless Seal Surface
Each corrosion-resistant stainless steel sleeve covers the worn original seal area and provides a smooth surface for the new seal.
Complete Two-Spindle Repair Kit
Includes two sleeves, two O-rings and two replacement seals—enough to service both ends of one trailer axle.
Designed for L44649 Applications
Intended for select spindle configurations using L44649 bearings with a 1-1/16" bearing journal.
Clear Measurement-Based Fitment
The required 1.25" spindle seal surface and 1.98" hub seal bore help distinguish this kit from more common 1.50" seal applications.
Included Components
| Quantity | Item |
| 2 | Corrosion-resistant stainless steel spindle repair sleeves |
| 2 | Rubber O-rings for sealing the sleeves to the spindle |
| 2 | Neoprene replacement seals with 1.375" inside diameter and 1.98" outside diameter |
| Not Included | Bearings, races, hubs, bearing protectors, grease and installation tools |
Important Fitment Note: Measure the existing spindle and hub before ordering. This kit requires an L44649-style 1-1/16" bearing journal, a 1.25" original spindle seal surface and a 1.98" hub seal bore. It will not install over a 1.50" seal surface. Axle capacity, trailer brand or bearing number alone does not confirm compatibility.
Spindo Seal 5619U, Spindo Seal Kit #5, 1.98 inch trailer grease seal kit, trailer axle spindle repair sleeve, marine trailer spindle seal repair kit, L44649 spindle repair kit, 1-1/16 inch trailer bearing spindle, 1.25 inch seal surface repair sleeve, 1.375 inch replacement seal, UFP trailer axle seal repair application, Reliable marine axle spindle repair, boat trailer grease seal sleeve kit, two spindle axle repair kit
