Product Description

The Dexter 10" Left-Hand Electric Brake Backing Plate is a genuine Dexter USA complete electric brake assembly, manufactured in the USA for trailer axles rated up to 3,500 lb (approximately 1,590kg) per axle.

Designed for 10" × 2¼" electric drum brakes, this complete Left-Hand (LH) backing plate is supplied fully assembled with brake shoes, genuine Dexter electric brake magnet, manual adjuster, return springs, hold-down hardware, actuating arm, horizontal park brake lever, pre-wired magnet leads and adjuster plugs.

The backing plate features a 4-bolt mounting flange with 4 × 7/16" UNF mounting studs on a 73mm (2⅞") PCD, with the mounting studs already installed.

This assembly is designed specifically for Dexter 10" electric brake drums.

Important: This backing plate does not suit AL-KO 10" brake drums.

Features & Benefits

• Genuine Dexter USA product
• Made in the USA
• Left-Hand backing plate
• Part Number K23-086-00 / XK23-086-00
• Complete ready-to-install brake assembly
• 10" × 2¼" (254 × 57mm) brake size
• Designed for 3,500 lb (approx. 1,590kg) trailer axles
• Genuine Dexter electric brake magnet
• Manual brake adjustment
• Horizontal park brake lever
• Brake shoes pre-installed
• Complete spring and hold-down hardware
• Pre-wired magnet leads
• Adjuster plugs included
• Four mounting studs included
• Designed specifically for Dexter 10" electric brake drums

Specifications

Specification	Details
Brand	Dexter
Part Number	K23-086-00 / XK23-086-00
Side	Left-Hand (LH)
Country of Manufacture	USA
Brake Size	10" × 2¼" (254 × 57mm)
Brake Type	Electric Drum Brake
Adjustment Type	Manual Adjust
Axle Capacity	3,500 lb / Approx. 1,590kg
Mounting Pattern	4 Bolt
Mounting Thread	7/16" UNF
Mounting PCD	73mm / 2⅞"
Mounting Studs	Included
Mounting Nuts & Washers	Not Included
Park Brake Lever	Yes – Horizontal
Brake Magnet	Genuine Dexter Electric Magnet
Drum Compatibility	Dexter 10" Electric Brake Drums
Sold As	1 × Left-Hand Assembly

Complete Ready-to-Install Assembly

Rather than rebuilding an old backing plate with individual brake components, this genuine Dexter unit is supplied as a complete assembled replacement.

Included:

• Brake Shoes
• Genuine Dexter Electric Brake Magnet
• Manual Brake Adjuster
• Return Springs
• Hold-Down Springs & Hardware
• Actuating Arm
• Horizontal Park Brake Lever
• Pre-Wired Magnet Leads
• Adjuster Plugs
• 4 × Mounting Studs

This makes it an ideal replacement when the existing brake assembly is worn, damaged or requires a major overhaul.

Important – Dexter Drum Compatibility

This backing plate is designed specifically for:

Dexter 10" Electric Brake Drums

It does NOT suit:

AL-KO 10" Brake Drums

Although Dexter and AL-KO both manufacture 10" trailer braking systems, the components should not be assumed to be interchangeable.

Always confirm the existing drum and backing plate before ordering.

3,500 lb Axle Capacity

This genuine Dexter backing plate is designed for trailer axles rated up to:

3,500 lb per axle

Approximately:

1,590kg per axle

This makes it suitable for a wide range of medium-duty trailer applications using genuine Dexter 10" braking components.

Manual Brake Adjustment

This backing plate uses a manual brake adjuster.

It is not a self-adjusting or Nev-R-Adjust assembly.

Brake shoe adjustment should be checked:

• During installation
• After the initial bedding-in period
• During routine trailer servicing
• Whenever braking performance changes

Correct adjustment is essential for effective and balanced trailer braking.

Horizontal Park Brake Lever

This assembly is fitted with a horizontal park brake lever, allowing connection to a compatible mechanical park brake cable system.

The park brake cable is not included.

Suitable Applications

Suitable for trailers fitted with Dexter 3,500 lb axles and compatible Dexter 10" electric drums, including:

• Caravans
• Camper trailers
• Boat trailers
• Car trailers
• Box trailers
• Utility trailers
• Horse floats
• Equipment trailers
• American trailers using Dexter 3,500 lb running gear

Left-Hand Backing Plate

This listing is specifically for the:

Left-Hand (LH)

Dexter Part Number: K23-086-00 / XK23-086-00

For a complete axle brake replacement, you will normally require the matching:

Right-Hand Dexter 10" Backing Plate – K23-087-00

For balanced braking performance, we recommend replacing both Left-Hand and Right-Hand backing plates together where possible.

What's Included

• 1 × Genuine Dexter USA Left-Hand Backing Plate
• Brake Shoes
• Genuine Dexter Electric Brake Magnet
• Manual Brake Adjuster
• Return Springs
• Hold-Down Springs & Hardware
• Actuating Arm
• Horizontal Park Brake Lever
• Pre-Wired Magnet Leads
• Adjuster Plugs
• 4 × Mounting Studs

What's Not Included

• Mounting Nuts
• Mounting Washers
• Brake Drum
• Park Brake Cable
• Wheel Bearings
• Grease Seal
• Grease Cap

Will This Fit My Trailer?

Before ordering, confirm:

✔ Dexter 10" × 2¼" electric brakes

✔ Left-Hand backing plate required

✔ 3,500 lb / approximately 1,590kg axle

✔ 4-bolt mounting flange

✔ 4 × 7/16" UNF mounting pattern

✔ 73mm / 2⅞" PCD

✔ Dexter 10" electric brake drum

✔ Manual-adjust electric brake system

If your trailer uses an AL-KO 10" drum, this is not the correct backing plate.

Matching Right-Hand Backing Plate

Replacing brakes on a complete axle?

Pair this Left-Hand backing plate with:

Dexter 10" Complete Electric Backing Plate – Right Hand

Part Number: K23-087-00 / XK23-087-00

For one complete axle:

• 1 × Left-Hand K23-086-00
• 1 × Right-Hand K23-087-00

Replacing both sides together helps maintain consistent and balanced braking across the axle.

Complete Your Brake Service

When replacing the backing plate, inspect or consider replacing:

Brake Components

• Matching Dexter Right-Hand Backing Plate K23-087-00
• Dexter 10" Hub Drums
• Wheel Bearings
• Grease Seals
• Grease Caps
  

Electrical Components

• Breakaway Switch
• Breakaway Battery Kit
  

Installation Tips

• Replace LH and RH backing plates together where possible.
• Inspect the brake drum for scoring, heat damage and excessive wear.
• Check the magnet running surface inside the drum.
• Inspect wheel bearings and bearing cups while the drum is removed.
• Adjust the brake shoes correctly after installation.
• Recheck brake adjustment after the initial bedding-in period.
• Check all brake wiring and electrical connections.
• Test the brake controller and breakaway system before towing.

Frequently Asked Questions

Is this a genuine Dexter backing plate?

Yes. This is a genuine Dexter USA backing plate manufactured in the USA.

What is the part number?

K23-086-00 / XK23-086-00

Is this Left-Hand or Right-Hand?

This product is the Left-Hand (LH) backing plate.

What is the matching Right-Hand backing plate?

The matching Right-Hand backing plate is K23-087-00 / XK23-087-00.

What brake size does it suit?

It is designed for 10" × 2¼" electric drum brakes.

What axle capacity does it suit?

It is designed for 3,500 lb (approximately 1,590kg) trailer axles.

Does it include the brake shoes?

Yes. The brake shoes are already fitted.

Does it include the electric brake magnet?

Yes. A genuine Dexter electric brake magnet is included.

Is it self-adjusting?

No. This is a manual-adjust brake assembly.

Does it have a park brake lever?

Yes. It has a horizontal park brake lever.

Are the mounting studs included?

Yes. Four mounting studs are included.

Are mounting nuts and washers included?

No. Mounting nuts and washers are sold separately.

Are the adjuster plugs included?

Yes.

Does it fit Dexter 10" drums?

Yes. It is designed specifically for compatible Dexter 10" electric brake drums.

Does it fit AL-KO 10" drums?

No. This backing plate is not compatible with AL-KO 10" drums.

Does it suit hydraulic brakes?

No. It is designed for electric drum brakes only.

Why Choose Genuine Dexter?

Dexter is one of the world's leading manufacturers of trailer running gear and braking components.

Choosing genuine Dexter gives you:

• Genuine USA-manufactured product
• Correct fitment for Dexter braking systems
• Genuine Dexter electric brake magnet
• Complete factory-assembled replacement
• Proven trailer braking technology
• Replacement parts availability
• Reliable performance for demanding trailer applications

Why Buy From Trailer Spares Online?

• Genuine Dexter products
• USA-manufactured trailer brake components
• Australia's trailer parts specialists
• Expert technical advice
• Fast Australia-wide shipping
• Large range of Dexter brake and running gear components
• Local Australian support