Slimline (SL)
SL Ford Slimline Bearing Kit
Frequently Asked Questions (FAQ)
What parts are included in an SL Ford Slimline bearing kit?
A standard Slimline kit contains the L68149 inner bearing (with L68110 cup), the LM12749 outer bearing (with LM12710 cup), a rear rubber grease seal, and a split pin.
What is the load rating for Ford Slimline bearings?
The Ford Slimline configuration is rated up to a maximum load capacity of 1,450kg per single axle. They are the standard choice for medium-duty trailers and are typically paired with 45kg square axles.
Can I use a Ford Slimline kit on a Holden axle?
No. Ford Slimline axles have a thicker inner journal (approx. 35mm) compared to Holden axles (approx. 31.7mm). The inner bearing will not slide onto a Holden axle stub.
Pros & Cons of Ford Slimline Bearing Kits
Evaluating the advantages and restrictions of the SL Slimline kit ensures your trailer is safely matched to its cargo demands.
| 👍 Advantages (Pros) | 👎 Limitations (Cons) |
|---|---|
| Higher Load Capacity: Significantly stronger than standard Holden kits, supporting up to 1,450kg per single axle safely.
Industry Standard: Exceptionally common across Australia and New Zealand, making replacement kits easy to source at any auto parts shop. Enhanced Structural Strength: The larger inner bearing diameter allows for a thicker, sturdier axle stub, minimizing axle flex under stress. |
Not for Heavy Commercial: Restricted to 1.45 tonnes. Tandem or heavy-duty trailers exceeding this threshold require upgrades to Parallel or 2-tonne setups.
Susceptible to Water Ingress: The standard rubber lip seal will let water in over time if submerged, meaning boat trailers require upgraded marine triple-lip seals. Regular Maintenance Crucial: Like all tapered roller configurations, they must be stripped, cleaned, and repacked every 12 months or 10,000km. |
How to Fit Ford Slimline Trailer Bearings
Precise installation is key to preventing premature road failure. Follow these structural steps:
- Extract the Old Cups: Clean any old grease from the hub cavity. Use a hammer and a mild steel drift punch to carefully drive out the old inner and outer cups (races) using the slots machined inside the hub.
- Seat the New Cups: Clean the hub bores thoroughly. Align the new cups perfectly square. Press or tap them into place using a dedicated bearing driver tool (or an old cup as a buffer) until they butt up flush against the internal hub shoulders.
- Pack Bearings with Grease: Place high-temperature wheel bearing grease into the palm of your hand. Push the large end of the bearing roller cage repeatedly into the grease until it packs tightly and forces out through the small end. Ensure complete saturation.
- Fit Inner Bearing & Rear Seal: Place the fully greased inner bearing (L68149) into its seated rear cup. Gently tap the new rubber grease seal into the back of the hub until it sits flat and flush with the hub casting.
- Mount Hub and Preload: Slide the hub assembly cleanly onto the axle stub. Insert the greased outer bearing (LM12749), followed by the washer and castle nut. Tighten the nut firmly to seat the assembly, back it off roughly a quarter turn until the hub spins freely with no noticeable axial play, and secure it with a new split pin.
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