Question about Nordic Track NordicTrack A2750 PRO Treadmill
I can adjust the rear belt roller but the belt slides off center on the front roller.
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Posted on Jan 02, 2017
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Drive Belt Installation for Treadmills
The drive belt is used by the motor to drive the
treadmill walking belt via the front roller pulley. A drive pulley is mounted
on the roller and the roller has knurling or a sleeve to help it drive the
walking belt. The treadmill console detects the current speed of the treadmill
by monitoring the movement of a magnet mounted on the front roller pulley with
a reed switch or by using an optic switch which monitors an optic disk mounted
either on the front roller or on the motor shaft. If the sleeve moves to the side, you will not
be able to keep the belt centered and many optic disks can be warped if pushed
to the side by the sleeve if it moves, but we do have replacement sleeve kits
Steps to Replace
1) Remove the safety key and unplug the treadmill
from the wall outlet.
2) Remove the screws securing the motor hood and
gently remove the motor hood.
3) Using an Allen wrench provided with the
treadmill, loosen the two rear roller adjustment bolts until the rear roller
comes into contact with the walking board.
Turn the bolts and equal number of turns on each side and keep a count
of how many turns you made so you will know how to properly re-tension the
4) Remove the drive belt from the motor pulley.
Place a screwdriver between the pulley and the belt and turn the pulley by
hand. Use the screwdriver to guide the belt over the edge of the pulley. Be careful with the screwdriver to prevent
damage to the pulley.
6) Mark the position of the front roller axle on the
front roller bracket above the front roller adjustment bolt using a Sharpie
marker so you will know where to put the bolt back into position. Remove the
front roller adjustment bolt if your treadmill's front roller has a pitch adjustment
bolt. If your treadmill does not have
exposed roller bolts you will need additional instructions. Please see the troubleshooting section on our
website for further help.
7) Gently slide the front roller from out of its
mounting position on the frame. Do NOT
remove the roller from the walking belt.
8) Slip the old drive belt off the roller and loop
the new drive belt onto the front roller pulley.
9) Replace the roller back into its slot on the
pulley side and re-tension the front roller pitch bolt to its proper place
using the Sharpie mark as a guide.
10) Using the screwdriver, loop the drive belt over
the motor pulley. Many Icon units
originally had the drive belt misaligned by design (if you can believe
it). This was to use the side load of the
drive belt in order to keep tension lower.
It does lower amp draw for the machine and replacing a side load drive
belt occasionally is much cheaper than replacing a motor and/or controller so
if your original drive belt was off-centered, install the new belt in the same
11) Re-tension the walking belt.
12) Plug in the machine and check the drive belt for
slipping. You can use some automotive
fan belt dressing on the grooved or contact side of the belt to help it with
grip on the pulleys and it will treat the belt as well. We prefer using belt dressing rather than
over-tensioning the belt for the aforementioned amp reasons as well as
additional stress placed on the drive system parts.
13) Replace the motor cover and test.
Make sure the walking belt is not slipping and is properly aligned and your
treadmill is ready to use.
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