Ransomes Super Certes 51 Safety, Operation & Maintenance Manual page 37

7 OPERATION
TO OPERATE EFFICIENTLY
Keep the machine clean, to avoid grass clippings dropping on to the turf.
Ensure that the concave is set correctly to deliver grass clippings into the grass box.
Clear any build up of grass on the front roll etc. when emptying the grass box.
Keep the space between the rear roll, top deck and concave clean.
Do not leave the cylinder running when the machine is stationery as this will bruise the grass.
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