1946 Dunbier AL-KO Brake Controller iQ7 Actuator | Marine Trailer Part

🔧 Product Description

Dunbier AL-KO iQ7 Electric-Over-Hydraulic Brake Actuator - Part Number: 1946

An Australian-designed power-assisted brake actuator for trailers fitted with hydraulic disc brakes. The iQ7 stores compressed air in an internal pressure chamber so hydraulic braking begins immediately when commanded by a compatible proportional brake controller, and includes breakaway functionality for trailers over 2000kg.

⚙️ Key Features

• Immediate brake response from stored compressed air

• Electric-over-hydraulic operation for trailer disc brakes

• Integrated breakaway system and switch

• Can be mounted internally or externally using the correct bracket

• Australian service-network support

• Compatible with approved motion-sensing/proportional brake controllers

📏 Specifications

• Maximum hydraulic pressure: Approximately 1000psi / 6.9MPa

• Fluid displacement: Approximately 21cc

• Published trailer application: Up to approximately 3 tonnes

• Brake type: Hydraulic disc

• Breakaway requirement: Designed to meet applicable ADR requirements for trailers over 2000kg

🔄 Cross Reference & Related Parts

• Dunbier: 1946

• Mounting brackets: Dunbier 1940IQ, 1940IQ-12 and 1940IQS

• Bleed gun assembly: Dunbier 1947

• Air dump valve/flap: Dunbier 1952

• Compatible controller examples include Redarc Tow-Pro Elite, Tekonsha P2/P3/Primus IQ, Hayes Energiser III and approved Elecbrakes controllers

🚤 Trailer Compatibility & Application

• Suits caravans and boat trailers with compatible hydraulic disc brakes

• Common Dunbier applications include 45mm, 50mm and 60mm hydraulic disc-brake axle systems

• Requires a compatible proportional in-vehicle brake controller and correctly sized electrical supply

🔌 Function

Receives the brake-controller command, uses stored compressed air to drive the hydraulic master circuit and applies the trailer disc brakes with rapid proportional response.

Common signs of wear or replacement:

• Compressor runs excessively or fails to build pressure

• Brake application is delayed, weak or absent

• Fluid leaks or repeated air enters the hydraulic circuit

• Breakaway warning or controller fault occurs

• Actuator will not release the hydraulic park brake after reconnection

🛠️ Installation & Safety

• Installation and commissioning should be performed by a competent brake/electrical technician

• Use the correct mounting bracket and orientation

• Provide heavy-gauge protected power and earth wiring

• Bleed the hydraulic system using the approved procedure

• Test service braking, park/brake release and breakaway operation before road use

📦 Condition

• Genuine Dunbier Marine Products trailer component

• Brand new

• Supplied as one complete AL-KO iQ7 actuator with integrated breakaway components as supplied

• Supplied in original or equivalent packaging