MARTIN couplings serve as a connecting element between machines and attachments. The MARTIN Multi-Coupling MMK is a patented system for connecting several hydraulic lines by means of a single lever movement. The retaining forces are absorbed through the FLAT STAR® couplings. The housing is not stressed. This means that the MMK remains almost wear-free.
The MARTIN Multi-Coupling MMK is designed for rough on-going site operations as well as for clean use in the workshop. To prevent damage to the couplings, coupling must be achieved without residual pressure. However, if the residual pressure in the lines cannot be dissipated, connectors with residual pressure eliminators can be used.
|Max. operating pressure||350 bar|
|Max. pulse pressure||420 bar|
|Minimum bursting pressure||1060 bar|
|Ambient temperature||-20 °C to +45 °C|
|Media temperature||-20 °C to +100 °C|
|Media fluids||ATF, mineral and synthetic oil (ester based)|
|Weight of MMK4 housing||approx. 13 kg|
|Weight of MMK4 cover||approx. 6 kg|
|Weight of MMK6 housing||approx. 20 kg|
|Weight of MMK6 cover||approx. 8 kg|
|Coupling type||FLAT STAR® quick-release plug-in couplings|
Handling errors can be prevented through clear identification of the function of the multi-coupling. The correct position of the couplings to one another can be guaranteed using the indexing pin.
The lock indicator indicates the problem-free connection of all couplings. The multi-coupling is therefore operational ready.