Pro-Form 520 Zn Treadmill User Manual page 24

Lower the treadmill (see HOW TO LOWER THE
TREADMILL FOR USE on page 22). Remove
the three #8 x 3/4" Screws (6). Carefully slide the
Motor Hood (57) off.
Locate the Reed Switch (95) and the Magnet (44)
on the left side of the Pulley (43). Turn the Pulley
until the Magnet is aligned with the Reed Switch.
Make sure that the gap between the Magnet
and the Reed Switch is about 1/8 in. (3 mm). If
necessary, loosen the #8 x 3/4" Truss Head Screw
(19), move the Reed Switch slightly, and then
retighten the Screw. Reattach the Motor Hood (not
shown) with the five #8 x 3/4" Screws (not shown)
and run the treadmill for a few minutes to check for
a correct speed reading.
Front
43
View
44
SYMPTOM: The incline of the treadmill does not
change correctly
a. Hold down the Stop button and the Speed increase
button, insert the key into the console, and then
release the Stop button and the Speed increase
button. Press the Stop button and then press the
Incline increase or decrease button. The tread-
mill will automatically rise to the maximum incline
level and then return to the minimum level. This will
6
57
1/8 in.
19
95
recalibrate the incline system. If the incline does not
begin calibrating, press the Stop button again, and
then press the Incline increase or decrease button
again. When the incline is calibrated, remove the
key from the console.
SYMPTOM: The walking belt slows when walked on
6
a. Use only a surge suppressor that meets all of the
specifications described on page 13.
b. If the walking belt is overtightened, treadmill per-
formance may decrease and the walking belt may
become damaged. Remove the key and UNPLUG
THE POWER CORD. Using the hex key, turn both
idler roller screws counterclockwise, 1/4 of a turn.
When the walking belt is properly tightened, you
should be able to lift each edge of the walking belt
2 to 3 in. (5 to 7 cm) off the walking platform. Be
careful to keep the walking belt centered. Then,
plug in the power cord, insert the key, and run the
treadmill for a few minutes. Repeat until the walk-
ing belt is properly tightened.
b
2–3 in.
Idler Roller Screws
c. Your treadmill features a walking belt coated with
high-performance lubricant. IMPORTANT: Never
apply silicone spray or other substances to
the walking belt or the walking platform unless
instructed to do so by an authorized service
representative. Such substances may deterio-
rate the walking belt and cause excessive wear.
If you suspect that the walking belt needs more
lubricant, see the front cover of this manual.
d. If the walking belt still slows when walked on, see
the front cover of this manual.
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