# 1971 Dunbier H3260G Mackay Disc Caliper Mechanical | Marine Trailer Part

🔧 Product Description

  

Dunbier Mechanical Disc-Brake Caliper - Part Number: 1971

  

A cable-operated mechanical disc-brake caliper used across Dunbier mechanical brake axles. Pull from the override coupling or handbrake rotates the operating lever, applying the pads to the 15mm disc through the internal screw and lever mechanism.

  

⚙️ Key Features

  

• Cable-operated mechanical disc caliper

• Suits Dunbier mechanical brake axles

• Integrated operating arm and return mechanism

• Serviceable brake pads and return springs

• Suitable for override and parking-brake operation

  

📏 Specifications

  

• Mackay reference: H3260G

• Common rotor application: 15mm disc

• Mounting bracket: Dunbier 1970 / H3261K

• Cable diameter: 4mm plastic-coated cable used in the associated system

  

🔄 Cross Reference & Related Parts

  

• Dunbier: 1971

• Mackay: H3260G

• Mechanical pad set: Dunbier 1927

• Mount and bolts: Dunbier 1970

• Cable adjuster: Dunbier 1972

• Cable: Dunbier 1974

• Return springs: Dunbier 1977 and 1979 depending caliper version

  

🚤 Trailer Compatibility & Application

  

• Suits Dunbier mechanical disc-brake axles

• Use with compatible 15mm rotor, mount and 4mm cable system

• Calipers should be serviced and adjusted equally across the axle

  

🔌 Function

  

Converts brake-cable pull into pad-clamping force at the disc and also provides parking-brake operation.

  

Common signs of wear or replacement:

  

• Operating lever does not return

• Caliper seizes after water immersion

• Pads wear unevenly or remain against the disc

• Cable travel increases despite correct adjustment

• Internal screw or return spring is damaged

  

🛠️ Installation & Safety

  

• Install with the correct 15mm mount and sleeves

• Set pad clearance and cable free play according to the brake instructions

• Keep grease off pads and rotor

• Confirm the handbrake applies and releases both wheels

• Road-test brake balance after installation

  

📦 Condition

  

• Brand new Dunbier Marine Products trailer component

• Supplied as one mechanical disc-brake caliper

• Supplied in original or equivalent packaging

## Details

- **Price:** 113.5 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 113.50 AUD | In stock |

## Images

- 1971 Dunbier H3260G Mackay Disc Caliper Mechanical | Marine Trailer Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/1971-dunbier-disc-calliper-mechanical-mackay-h3260g)
> Updated: 2026-08-05