Retsch SM 300 - Manual (Page 28)

Mode of Operation of Feed Hopper
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6 Mode of Operation of Feed Hopper
NOTE
Motor blockage
The material being ground clogs the rotor
– Blockages can damage mechanical components.
• Feed material only while the device is running.
• Dose the material feed to suit the properties of the material.
• Switch the device on.
• Pull the metering plunger (C) and the plunger (B) upwards.
• Put the material to be ground into the filling hole (AE).
• If necessary, use the metering plunger to push the material in further.
• Seize the plunger by the grip and pull the detent pin (D).
• Press the plunger slowly downwards.
NOTE
Do not use excessive force on the plunger. Blockages can damage mechanical
components.
In most cases the plunger’s own weight is sufficient to press the material into the
grinding chamber.
If not, the plunger can be used to push the material in further carefully and within
the scope of the device’s efficiency