81 - 1
Section E Hydraulics
9803/6410
Section E
81 - 1
Issue 1
Rotary Coupling
Operation
The coupling is located in the centre of the machine between the lower and upper sections and rotates around the slew
centreline. The supply and return oil flow to the coupling, piped from the upper to the lower section, is not affected by the
rotational movement and allows the machine to slew 360° in both directions.
The rotary coupling consists of the inner axle and outer rotor with packing rings, 'O'-rings, thrust plate and cover. In the axle
and rotor there are pairs of ports and oil passages, each pair being sealed from the others by packing rings and 'O'-rings.
Both the axle and rotor can rotate and the oil can flow freely through the oil grooves.
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