W&H Perfecta 900 Instructions For Use Manual page 15

Knee control unit operation
Before connect or disconnect mains cable, motor cable, operating controls, foot-operated starter (optional), air hose,
coolant hose (control unit with external coolant supplying) switch off the control unit .

Push in the fitting for the blow
out function up to the limit stop .

Connect the motor cable,
operating controls, air hose,
foot-operated starter (optional),
coolant hose (control unit with
external coolant supplying) and
mains cable .
Note the positioning!

Insert control unit up to the
limit stop on the holding plate .
One drop of oil makes
insertion easier .

Switch on control unit (I) .
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