# 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

## Details

- **Price:** 2011.5 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2011.50 AUD | In stock |

## Images

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

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/1946-dunbier-alko-brake-controller-iq7-actuator)
> Updated: 2026-08-03