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MAT

8K Hydraulic Brake – Right Side | MT
SKU: 8HRSA-MT
$85.00 USD $85.00 USD $149.00 USD
Sale 42.95% $64.00 USD (42.95%)
Shipping calculated at checkout.
In stock
Description

This 8K-rated hydraulic drum brake assembly is designed for the right (passenger) side of trailer axles using a 4-bolt brake flange. With a 12.25" x 3.375" drum profile and a uni-servo plunger design, it offers strong, consistent braking performance—ideal for electric-over-hydraulic systems in heavy-duty trailer applications.

Detailed Information:
Axle Capacity 8,000 lbs
Hub Capacity 12.25" x 3.375"
Bolt Pattern 4-bolt flange
Wheel Compatibility 16", 17.5"
Plunger Type Uni-Servo / Single Plunger
Studs Not applicable
Coating Corrosion-resistant backing plate
Fitting:

Installs on the right-hand side of 8,000 lb trailer axles with a 4-hole brake flange. Ideal for use with electric-over-hydraulic brake actuators. Compatible with Dexter, Besser Pro, and Lippert axle configurations. Mounting hardware not included.

Features:
  • Self-Adjusting Mechanism: Minimizes maintenance by automatically maintaining optimal brake tension.
  • Fully Assembled: Pre-installed shoes, springs, and components for easy bolt-on installation.
  • Heavy-Duty Construction: Built with high-quality materials for strength and reliability.
  • Hydraulic System Ready: Designed specifically for use with electric over hydraulic trailer braking systems.
  • OEM-Compatible: Direct replacement for Dexter K23-403-00 and equivalent models.
Interchangeable Part Numbers:
  • MAT 77-1208H-2
  • MAT 77-1208H-02
  • DEXTER K23-403-00
Product Overview:

The MAT 8K hydraulic drum brake assembly (right side) is an ideal upgrade or replacement for high-capacity trailer applications. Its self-adjusting design, OEM compatibility, and pre-installed components make it a reliable and convenient choice for maintaining trailer safety and performance.

We want you to be completely satisfied with your purchase. That’s why we offer a hassle-free return policy within 30 days of delivery*. If your item is unused, in original packaging, and eligible for return, you can send it back for a refund or exchange.

*Some exclusions may apply

Some of our products are backed by a 1-year limited manufacturer warranty covering defects in materials and workmanship under normal use. If you experience any issues during this period, we’ll work with you to repair, replace, or resolve it according to warranty terms.*

*Proof of purchase required

Need it fast? We’ve got you covered. Orders confirmed before 3 PM Eastern Standard Time (Monday–Friday) are processed and shipped out the same business day. Orders placed after the cutoff will ship the next business day.
8K Hydraulic Brake – Right Side | MT

Customer Reviews

Based on 12 reviews
83%
(10)
17%
(2)
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A
Alexander Petrov
Solid Mounting and No Vibration

Fits snug on the 4-bolt flange. No wobble or movement, even on rough roads. The corrosion-resistant plate looks clean after months of winter hauling.

M
Matthew Baker
Smooth & Consistent Hydraulic Response

Used with an EOH actuator—braking is linear and predictable. No jerking or grabbing. The uni-servo plunger delivers strong pressure without oversensitivity.

L
Levi Toplin
Self-Adjust Works Well – Just Give It Time

It took a few stops to sync up, but now it maintains perfect clearance. No squealing or dragging. Huge improvement over manual-adjust brakes on older trailers.

R
Rollo Gras
Slight Drag After Installation

Took about 50 miles to break in. Initial drag disappeared as the self-adjuster calibrated. Now spins free and stops hard when needed. Normal for new hydraulic brakes.

W
Way Huygens
Worth Upgrading the Whole Set

Started with one side—liked it so much I replaced all four brakes. The 30% discount made it affordable. Now my trailer stops straight and smooth every time.

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