Ring Type / Coupling Park Mechanism

When used in a commercial or defence department application, often a 75 mm ring type towing eye is requested.
This style of coupling is similar in function to ball type couplings (fixed and over ride ) but instead of the connection to the tow vehicle being a standard 50 mm ball, the connection is a 75 mm inside diameter ring and this attaches to a “pintle hook” fitted to the tow vehicle.
These types of couplings are primarily used in applications where the tow vehicle is a heavy commercial truck. As the Australian Standard AS4177 states the 50mm towball to have a maximum capacity of 3500 kg ATM (total loaded mass), ring couplings are used when higher loads are involved.

70mm Ring Type

PART NO	DESCRIPTION	MOUNTING HOLE (LXW) AND DIAMETER	SURFACE FINISH	BALL TO FIRST CENTRE HOLE (NOMINAL)
614090	2000 kg Hydraulic Override with 3/4” master cylinder conversion	184mm x 54mm x 13.5mm	Painted	138mm
614092	2000 kg Hydraulic Override with 7/8” master cylinder conversion	184mm x 54mm x 13.5mm	Painted	138mm
614094	2000 kg Hydraulic Override with 1” master cylinder conversion	184mm x 54mm x 13.5mm	Painted	138mm
614095	3000 kg Mechanical Override – no brake plate	184mm x 54mm x 13.5mm	Painted	138mm
614096	2000 kg Mechanical Override – no brake plate	184mm x 54mm x 13.5mm	Painted	138mm
614098	2000 kg Mechanical Override with brake plate	184mm x 54mm x 13.5mm	Painted	138mm
614124	3000 kg Hydraulic Ring Override with 1” master cylinder conversion	184mm x 54mm x 13.5mm	Plated Body	138mm
614128	3000 kg Mechanical Ring Override with brake plate	184mm x 54mm x 13.5mm	Plated Body	138mm
614097	Coupling Ring – Anti Swivel Plate*	184mm x 54mm x 13.5mm	Painted	138mm

An anti swivel plate should be used to restrict the rotation of the ring to prevent ”Lock Up”. (Talk to your AL-KO customer service personnel)

Pintle Hooks

PART NO	DESCRIPTION
614310	Pintle Hook & Ball Combination – 6 Tonne hook & 3.5 Tonne Ball
614312	Pintle Hook 10 Tonne

Park Brake Mechanism

PART NO	DESCRIPTION	MOUNTING STYLE
619100	Mechanical Park Brake Mechanism 400mm	Requires separate mounting
619150	Mechanical Park Brake Mechanism 280mm	Mounts under rear of coupling bolts