Product Description

The AL-KO 12" Off-Road Electric Brake Backing Plate is a genuine AL-KO complete heavy-duty brake assembly designed for 2500kg trailer axles fitted with 12" × 2" electric drum brakes.

Available in both Left-Hand (P/N 331351HJT) and Right-Hand (P/N 331350HJT) configurations, each backing plate is supplied fully assembled with brake shoes, adjuster, springs, actuating arm, park brake lever and a genuine AL-KO plastic-core off-road electric brake magnet, providing a complete ready-to-install replacement assembly.

Designed specifically for harsh Australian towing conditions, the genuine AL-KO plastic-core off-road magnet offers improved durability and reliable braking performance on corrugated roads, dirt tracks, mud, dust and water crossings.

This backing plate is compatible with both AL-KO and Dexter 12" electric hub drums.

Please note: Backing plates are sold individually. For a complete axle, you will require one left-hand and one right-hand backing plate.

Features & Benefits

• Genuine AL-KO off-road product
• Available in Left-Hand (331351HJT) or Right-Hand (331350HJT)
• Complete ready-to-install brake assembly
• Designed for 2500kg trailer axles
• 12" × 2" electric brake assembly
• Genuine AL-KO plastic-core off-road brake magnet
• Heavy-duty off-road design
• Pre-adjusted brake shoes
• Brake adjuster fitted
• Complete return spring and hold-down hardware
• Integrated park brake lever
• Pre-wired magnet leads
• Suits both AL-KO and Dexter 12" electric hub drums
• Designed for Australian off-road conditions

Specifications

Why Choose the Off-Road Version?

The genuine AL-KO off-road backing plate is specifically engineered for trailers operating in Australia's toughest environments.

Advantages include:

• Genuine AL-KO plastic-core off-road brake magnet
• Improved durability on corrugated roads
• Better resistance to dust, mud and water ingress
• Reliable braking performance in harsh off-road conditions
• Genuine AL-KO heavy-duty design
• Ideal for long-distance touring and remote-area travel

Ideal for:

• Off-road caravans
• Hybrid caravans
• Camper trailers
• Off-road boat trailers
• Expedition trailers
• Heavy-duty touring trailers

Complete Ready-to-Bolt-On Assembly

Each backing plate is supplied fully assembled with:

• Brake Shoes
• Genuine AL-KO Plastic-Core Off-Road Brake Magnet
• Brake Adjuster
• Return Springs
• Hold-Down Springs & Pins
• Actuating Arm
• Park Brake Lever
• Pre-Wired Magnet Leads

Simply install the backing plate, connect the magnet wiring and adjust the brakes.

Brake Compatibility

This backing plate is designed to suit:

• AL-KO 12" Electric Hub Drums
• Dexter 12" Electric Hub Drums

Suitable for electric drum brake systems only.

Not suitable for hydraulic drum brake systems.

Suitable Applications

Ideal for:

• Off-road caravans
• Hybrid caravans
• Camper trailers
• Horse floats
• Heavy-duty boat trailers
• Machinery trailers
• Utility trailers fitted with 2500kg axles

Left-Hand vs Right-Hand

Available in two versions:

Left-Hand (LH)

Part Number: 331351HJT

Right-Hand (RH)

Part Number: 331350HJT

Backing plates are sold individually.

For a complete axle, purchase:

• 1 × Left-Hand Backing Plate
• 1 × Right-Hand Backing Plate

For optimum braking performance, we recommend replacing both backing plates at the same time.

What's Included

Each backing plate includes:

• Brake Shoes
• Genuine AL-KO Plastic-Core Off-Road Brake Magnet
• Brake Adjuster
• Return Springs
• Hold-Down Springs & Pins
• Actuating Arm
• Park Brake Lever
• Pre-Wired Magnet Leads

What's Not Included

• Mounting Studs
• Mounting Nuts
• Brake Drum
• Brake Cable

Will This Fit My Trailer?

Before ordering, confirm the following:

✔ 2500kg axle

✔ 12" × 2" electric drum brakes

✔ 5-bolt mounting flange

✔ Electric brake system

✔ AL-KO or Dexter 12" hub drum

If these specifications match your existing backing plate, this assembly is suitable for your trailer.

Complete Your Brake Service

We recommend replacing or inspecting the following components at the same time:

Brake Components

• AL-KO 12" Hub Drums 6 Stud
• AL-KO 12" Hub Drums 5 Stud
• Wheel Bearings
• Grease Seals
• Grease Caps
  

Electrical Components

• Breakaway Switch
• Breakaway Battery Kit

Installation Tips

• Replace both backing plates together for balanced braking performance.
• Inspect the brake drum for wear before installation.
• Check the brake magnet contact surface for scoring or excessive wear.
• Adjust the brake shoes after installation.
• Re-adjust after the initial bedding-in period.
• Test the brake controller before towing.

Frequently Asked Questions

Is this sold individually?

Yes. Each backing plate is sold individually.

Do I need one or two?

A single axle requires:

• 1 × Left-Hand
• 1 × Right-Hand

Does it include the brake shoes?

Yes. Brake shoes are already fitted.

Does it include the off-road brake magnet?

Yes. It includes the genuine AL-KO plastic-core off-road brake magnet.

• LH Magnet: 339350
• RH Magnet: 339355

Does it include the adjuster and springs?

Yes. The backing plate is supplied fully assembled.

Does it include mounting studs or mounting nuts?

No. Mounting studs and mounting nuts are not included.

Does it suit Dexter hub drums?

Yes. It is compatible with Dexter 12" electric hub drums as well as AL-KO 12" electric hub drums.

Does it suit hydraulic drum brakes?

No. This backing plate is designed for electric drum brake systems only.

Why Buy From Trailer Spares Online?

• Genuine AL-KO products
• Australia's trailer braking specialists
• Expert technical advice
• Fast Australia-wide shipping
• Large range of AL-KO brake components
• Competitive pricing and local support