Replacement 55.5mm Dust Hub Cap Grease Cover for Alko Trailer Drums - 2 Pack

Name: Replacement 55.5mm Dust Hub Cap Grease Cover for Alko Trailer Drums - 2 Pack
Brand: AB Tools
SKU: kqx4qklxrc
Availability: InStock

This listing is for a pair of 55.5mm trailer and caravan hub caps designed for use with many Alko ...

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Product Information

Full details

This 2-pack of 55.5mm dust hub caps from AB Tools is designed for trailer and caravan owners using specific Alko brake drum systems who need a reliable, durable seal to protect their wheel bearings from dirt and debris. These caps provide a critical barrier against environmental contaminants, ensuring long-term bearing health; however, it is essential to measure your hub's internal diameter precisely before purchase, as these are specific to 55.5mm openings.

All features

Model Part Number	TR246_2PK
Brand	AB Tools

Extended Product Information

FAQs

Are these caps compatible with non-Alko hubs?

These are specifically designed for Alko brake drums (1637 and 2151). They may fit other hubs with a 55.5mm opening, but compatibility is only guaranteed for the specified Alko models.

Do I need a special tool to install them?

A rubber mallet or soft-faced hammer is recommended to ensure the cap is tapped in evenly without denting the metal.

Why is it important to use steel caps instead of plastic?

Steel offers superior durability and heat resistance, especially in heavy-duty towing applications where brake heat may degrade plastic components.

Does the pack include two caps?

Yes, this listing includes a pair (2) of metal hub caps.

How do I know if I have an Alko 1637 or 2151 drum?

This information is usually stamped directly onto the brake drum body or listed in your trailer's technical documentation.

Troubleshooting

Cap is too loose and falls out

Verify the internal hub diameter is exactly 55.5mm. If the hub is worn, the cap may not seat properly.

Cap will not fit into the hub

Check for burrs on the hub opening and ensure you are using the correct 55.5mm diameter. Do not force the cap if it is clearly too small for the housing.

Pros and Cons

Pros

Durable steel construction prevents cracking
Zinc-plated finish resists corrosion and rust
Perfect fit for specified Alko brake drum models
Cost-effective 2-pack for complete axle maintenance

Cons

Not compatible with hubs outside the 55.5mm specification
Requires manual pressure to install, which may be difficult for some
Steel caps may dent if struck with excessive force during installation

Setup, Compatibility & Care

Installation

Ensure the hub center is clean and free of old grease or dirt.
Align the cap squarely with the opening of the hub.
Using a soft-faced mallet, gently tap the center of the cap until it seats firmly against the shoulder of the hub.
Avoid hitting the outer edges, as this may distort the metal and break the seal.

Compatibility

These caps are strictly intended for Alko brake drums 1637 and 2151. Always use a vernier caliper to confirm your hub's internal diameter is exactly 55.5mm before attempting installation.

Care

Periodically inspect the caps for signs of damage or extreme corrosion. If you notice a loose fit, it may indicate that the hub housing has been worn and the cap should be checked for a secure press fit.