Sunny Health & Fitness SF-E905 - Manual (Page 12)

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6. If it is very hard to pedal on the higher tension levels, or you hear rubbing noises,
please remove the chain cover, and adjust the screw seen in the following diagram.
You will need to lower the position of the screw by turning counter-clockwise; this
will keep the magnet board from contacting the magnetic flywheel. Before
re-installing the chain cover, test the tension level 8 to ensure the magnets do not
touch the flywheel.
7. If you still hear noises after you did Step 5 and Step 6, please remove the chain cover;
loosen the screws for the flywheel about a half of a rotation. See the following
diagram.
8. If you feel the machine is uneven, please adjust the Leveler Cap (5) on Real Stabilizer
(3) by turning it. If the machine is wobbly when you use it, please consider adding an
exercise mat under it