Trojan Master Cylinder Bracket and Lever Assembly Trailer

The Master Cylinder Bracket & Lever Assembly is a precise, reliable retrofit that converts Mechanical Operation Override Couplings into smooth, hydraulic braking action. Built to meet Australian standards and designed for easy retrofitting, this back frame system brings consistent stopping power to both 2- and 4-wheel braked trailers.

Key features that make this assembly stand out:

• New-style Snap Lock design for quick, secure mounting and uncomplicated maintenance.
• accommodates two master cylinder bore sizes: 3/4" and 7/8" for broad compatibility with existing Trojan couplings.
• AS4177.3 (1994) compliant, ensuring safe, compliant braking performance across Australian trailers.
• Includes operating lever and base, with a range of back frame assembly options for seamless upgrades or conversions.
• Interchangeable with older back frames—current versions are designed to work with legacy frames, preserving your investment.

configurations and components

• 3/4" bore version: alloy body and reservoir for robust, long-life performance.
• 7/8" bore version: early models used a plastic reservoir; late-model 7/8" cylinders are alloy for enhanced durability.
• Back Frame & Lever assemblies:
  • T201680 Back Frame & Lever (All)
  • T993050 Back Frame Assembly - Includes Lever & Hydraulic Cylinder 3/4" Cylinder
  • T993052 Back Frame Assembly - Includes Lever & Hydraulic Cylinder 7/8" Cylinder
  • T993082 Lever Assembly - Includes Pawl (Fold-down type) (All)
• Grip and control options:
  • TPT1038 Plastic Grip
  • TPT10391 Master Cylinder Assembly 3/7" Cylinder
  • TPT10392 Master Cylinder Assembly 7/8" Cylinder

installation and compatibility at a glance

Designed to mount via two 12 bolts across the rear of most standard braked couplings that use the same format, this back frame assembly is suitable for both 2-wheel braked trailers (3/4" bore) and 4-wheel braked trailers (7/8" bore). The system is engineered to interchange with older pressed-steel back frames, ensuring a straightforward upgrade path without wholesale hardware changes.

practical use cases and benefits

• Retrofit projects: upgrade existing mechanical override systems to hydraulic action for more predictable braking response and easier operation in varying loads.
• Fleet reliability: standardized master cylinders and levers reduce maintenance headaches and parts variety across trailer fleets.
• Maintenance-friendly design: snap-lock components and clearly identified bore options simplify routine checks and replacements.
• Versatile deployment: suitable for trailers requiring either 3/4" or 7/8" hydraulic cylinders, with explicit compatibility notes for 2-wheel and 4-wheel braked configurations.

why choose the Master Cylinder Bracket & Lever Assembly

• Specific, purpose-built for Trojan couplings with a clear upgrade path from mechanical to hydraulic braking systems.
• The combination of alloy bodies, reservoir options, and available back frame assemblies delivers durability, reliability, and long service life in demanding towing environments.
• Back-frame compatibility ensures you can source replacements and upgrades without tying yourself to a single era of hardware.

Whether you’re outfitting a new trailer or upgrading an older fleet, the Master Cylinder Bracket & Lever Assembly provides precise hydraulic control, straightforward installation, and a future-ready design that keeps your braking system compliant, dependable, and ready for the road ahead.