Description
Overview:
Coupling Damper for Knott KF/KR17-20 (MPN 763 899) is a hydraulic overrun damper used in the drawbar of braked trailer couplings to control compression and rebound during braking. It is intended for Knott KF and KR 17-20 series overrun couplings and restores smooth, consistent coupling movement where the original unit has weakened or failed. The damper is manufactured by Stabilus, a German producer of damping components, and follows the Knott dimensional pattern for the 17-20 family to ensure correct fitment within the coupling yokes and housings. Key connection and length dimensions are provided to aid identification and replacement. Use during coupling refurbishment, brake service, or when symptoms such as judder, snatch or excessive free movement are present.
Key Features:
- Suitable for Knott KF/KR17-20 overrun couplings
- Manufactured by Stabilus
- F1 thread: M10
- Dimension A1: 26 mm (per drawing)
- Dimension A2: 24 mm (per drawing)
- Dimension B: 12 mm (per drawing)
- Dimension C: 29 mm (per drawing)
- Dimension D: 10 mm (per drawing)
- Length G: 325 mm
- Length H: 530 mm
Typical Applications:
Installed in the overrun brake mechanism within the drawbar housing on braked trailers using Knott KF and KR 17-20 couplings. Found on general duty trailers, plant and equipment transporters, and similar towing set-ups built with Knott running gear. Suitable as a direct service replacement when overrun damping performance has deteriorated or during scheduled coupling maintenance.
Also known as:
Overrun damper
Coupling shock absorber
Drawbar damper
Trailer brake damper
Maypole part number MP1902B
Product Specifications
| L&S Part No. | 763 899 |
|---|---|
| Part Type | Genuine Part |
