Description
Overview:
This Overrun Coupling Draw Tube (MPN 764 116) is a service replacement component for AL-KO 120SR and 121SR overrun brake couplings. The draw tube is the inner sliding member within the coupling body that transfers towing and braking forces to the overrun mechanism. With a 35 mm outside diameter (approximately 1 3/8 in), it is sized to suit the original AL-KO coupling bore on these models. Use it to restore smooth sliding action and correct brake actuation when refurbishing or repairing braked trailer couplings specified with AL-KO 120SR/121SR. Typical applications include plant and construction trailers, general duty braked trailers, car transporters, utility trailers and caravans that use these AL-KO couplings. This listing is for the draw tube component only. Check the identification on the coupling (stamped model code) and measure the tube diameter to confirm compatibility with 120SR/121SR before ordering.
Key Features:
- 35 mm outside diameter (approx. 1 3/8 in) draw tube for AL-KO couplings
- Replacement inner slide for AL-KO 120SR and 121SR overrun brake assemblies
- Restores correct overrun movement and braking response when servicing the coupling
- Suitable for use in braked trailer systems specified with AL-KO 120SR/121SR models
- Single-component supply for straightforward service replacement
- Dimensioned to match the coupling bore used on 120SR/121SR housings
Typical Applications:
Used inside the overrun coupling on the trailer A-frame to transmit drawbar forces to the damper and brake linkage. Fits AL-KO 120SR and 121SR couplings commonly found on light plant trailers, construction and hire fleet trailers, general purpose braked trailers, car transporters, utility trailers and caravans built with these AL-KO units.
Also known as:
Draw Tube
Drawbar Tube
Inner Slide Tube
Overrun Coupling Drawtube
AL-KO 35 mm Draw Tube
Product Specifications
| L&S Part No. | 764 116 |
|---|---|
| Part Type | Genuine Part |
| Unit of Sale | 1 |

