JUKI MF-7900 Series Engineer's Manual page 127

Adjustment procedures
5. Adjusting the suction force
(1) When A is turned clockwise, the suction force is decreased.
(2) For the mechanical valve of MC37, the suction force can be
adjusted by turning B with a screwdriver or the like.
6. Installing the waste bag
(1) Install waste bag plate ❷ to waste bag housing ❶ with screw
❸ , washer ❹ and nut ❺ .
In this state, however, plate ❷ rotates. To stop the state, insert
stop plug ❻ into the hole of waste bag housing ❶ and waste
bag plate ❷ so that plate ❷ faces the direction as shown in the
figure.
(2) Fix waste bag plate ❷ to the position as shown in the figure
with wood screws ❼ .
(3) Insert reducing socket ❽ into the cloth chip inlet port of waste
bag housing ❶ , and clamp it with hose clamp ❾ .
(4) Install the mouth of waste bag  so as to run parallel with the
groove of waste bag housing ❶ , and clamp it with a piece of
string.
Results of Improper adjustment
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