Ryobi 3302H Operation Manual page 208

Chapter 3 Periodic Maintenance
1 O)
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Cleaning the needle of the dampening solution cooling/circulation device
Remove any stains that adhere on the needle surface by using an eraser.
Press the eraser on the needle and twist it 2 to 3 times. Just doing this can
clean the needle surface.
After the cleaning, mount it at the former position properly.
11)
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Cleaning the intermediate tank
12)
Foreign particles and ink will accumulate on the bottom of the intermediate
tank. Drain the dampening solution in the tank and clean the tank with a
soft sponge.
(Note) The dampening solution condensation around the intermediate tank
will accumulate in the tray under the tank. So please remove it.
Cleaning the dampening solution circulation device filter
Maintenance Edition - 32
The foreign particles will accumulate in the dampening solution circulation
device fiter.
If the filter is blocked, the circulation function will be reduced.
Remove the filter and wash it with water.