Description
Overview:
The Overrun Coupling Damper for Knott KF27A / KFG30 (MPN 763 871) is a replacement damper for braked trailer overrun couplings, used to control drawtube movement and provide consistent braking response. Supplied by Maypole and manufactured by Stabilus in Germany, it matches the original Knott fitment on KF27A and KFG30 couplings commonly found on plant, transport and general-duty trailers. The unit is built to the specified mounting and stroke dimensions, including a 12 mm reference dimension and an M10 threaded connection, allowing straightforward like-for-like replacement. When the original damper becomes weak or seized, braking can become harsh or inconsistent; fitting a new damper restores smooth overrun action and helps protect coupling components. Key dimensions are listed below to assist with identification and to confirm compatibility before installation.
Key Features:
- Suits Knott KF27A and KFG30 overrun couplings
- German-made Stabilus damper unit
- Dimensional references (mm/in): A1 18 mm (0.71"), A2 24 mm (0.94"), B 12 mm (0.47"), C 29 mm (1.14"), D 10 mm (0.39")
- F1: M10 threaded end
- Length references (mm/in): G 320 mm (12.60"), H 530 mm (20.87")
- Designed to control drawtube movement and reduce snatch during braking
- Replacement part matching OE-style fitment for the specified Knott couplings
Typical Applications:
Used inside the overrun coupling on braked trailers to manage the fore-and-aft movement of the drawtube during braking and reversing. Typical installations include plant trailers, car transporters, general-purpose builder's trailers, horseboxes and boat trailers where Knott KF27A or KFG30 couplings are fitted. Suitable for fleet maintenance and trailer service work where the original damper has failed or performance has degraded.
Also known as:
Overrun damper
Coupling damper
Coupling shock absorber
Drawtube damper
Knott KF27A damper
Knott KFG30 damper
Maypole part number MP1903B
Product Specifications
| L&S Part No. | 763 871 |
|---|---|
| Part Type | Genuine Part |
