Oil Bath Bearing Cap – Boat Trailers (Pair)
Price
Price range: $66.00 through $78.00 Inc.GST
Shipping
Oil Bath Bearing Caps to Suit Boat Trailers
Upgrade your boat trailer’s hub protection with our premium Oil Bath Bearing Caps. Designed specifically to combat the harsh marine environments, these caps use continuous oil submersion to lubricate your bearings. The oil is contained in a built-in reservoir inside the cap, circulating through the bearings as the wheel rotates. This continuous flow keeps the bearings cool, prevents overheating, and significantly extends the lifespan of your trailer’s running gear under heavy loads.
• Quoted price is for ONE PAIR (2 caps) of oil bath caps.
• Fill oil to the 1/2-way mark only. Excess oil causes pressure buildup and seal damage.
Specifications & Fitment Compatibility
These oil-bearing caps are engineered to fit a wide range of trailer hubs, disc rotors, and drums. Please select the correct model code for your axle setup:
| Model Code | Size / Diameter | Compatible Bearing Kits & Hubs |
|---|---|---|
| CAP-45-OIL | Standard Aus Fit | Australian Slimline and Holden Bearing Kits |
| CAP-1980-OIL | 1.98-inch | Dexter, Kodiak, and DeeMaxx American Bearing Kits (3500lbs) |
| CAP-2.441-OIL | 2.441-inch | Dexter, Kodiak, and DeeMaxx American Bearing Kits |
Performance Factors
Advantages
- Increased Bearing Life: Continuous cooling prevents overheating.
- Improved Lubrication: Uniform oil coverage reduces friction wear.
- Reduced Noise: Dampens vibrations for a smoother, quieter tow.
Disadvantages
- Increased Complexity: Requires precise installation and fluid monitoring.
- Higher Initial Cost: Priced higher than standard grease dust caps.
- Leak Risk: Rear oil seal failure will cause fluid loss.
Frequently Asked Questions (FAQ)
Q: How much oil should I put in the bearing cap?
A: Only fill the reservoir to the 1/2-way mark. Overfilling causes excessive pressure during travel, which can blow out your rear seals.
Q: Can I use these on standard utility trailers?
A: Yes. While designed for boat trailers to prevent salt water intrusion, they excel in any high-load or high-temperature axle application.
Q: What happens if the oil leaks?
A: If a seal fails and oil leaks out, the bearings will quickly overheat and fail. Regularly check the clear sight glass on the caps before towing.
Customer Reviews
★★★★★ Great upgrade for salt water! – Shane M., QLD
“Swapped my old grease caps for the CAP-45-OIL pair on my boat trailer. Visual inspection makes pre-trip checks a breeze. Just remember not to overfill past halfway.”
★★★★☆ Keeps running cool – David T., NSW
“Fitted the 1.98-inch caps to my imported American trailer. Hubs run noticeably cooler on long highway runs down to the boat ramp. Installation requires patience to get the seals perfect.”
Authoritative Resources
Oil Bath Bearing Cap fits the following hubs and disc rotors
- 10-inch Galvanised Disc Rotor
- Land Cruiser Slimline Galvanised Disc Rotor
- DeeMaxx 12-inch Disc Rotor | Ventilated
- Stainless Steel Hub – American
Complete Range of Dust Caps
- Australian Dust Cap – Galvanised – 45.2mm
- 2t – Parallel Hub Dust Cap
- 90mm Mega MDC Dust Cap
- 70mm Aluminium Dust Cap – Screw
- 69mm or 2.75-Inch x 2t Dexter Dust Cap
- 63mm Australian Grommet Dust Cap (Pair)
- 2.441-inch x 2t Dexter Dust Cap DC2441
- 63mm Dust Cap Dolly
- 45mm Dust Cap Dolly
- 3-inch Dust Cap
- Dexter 1.98-inch Dust Cap DC1980
- 59mm Simplicity Dust Cap AXDCAP59
There are no FAQs for this product.
Additional information
| Weight | 1 kg |
|---|---|
| Dimensions | 20 × 10 × 6 cm |
| Bearing Profile |
Our Service Lifetime Warranty
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
Couplemate™ is a manufacturer and vendor of high-quality towing, trailer, and caravan components. Couplemate™ Core Goods and Custom Work are guaranteed to be free of defects for the service lifetime of the product when used as intended.
Warranties are non-transferrable and Couplemate™ requires satisfactory proof of purchase prior to issuing a remedy. The full Couplemate™ Warranty Policy can be found in the Terms & Conditions: Section 8 – Consumer Guarantees & Warranty.
Warranties are in addition to your rights under the Australian Consumer Law. If something is wrong with your order, please contact our team.
60-Day Returns
After 60 years of experience, we know that life has its unpredictable moments.
All Couplemate™ orders (online, over the phone, or in-store) have a 60 day period for change-of-mind returns and exchanges. There are some items that can’t be returned and some returns may incur a 15% restocking fee.
You can view our full policy for change-of-mind returns here.
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