Usually wax build up on rollers. Check for lumps on track at rollers.
SOURCE: ???maximum user weight for Precor 9.45i
Normally most home treadmills are 250-300lb user capacity.
Call Precor with your model # and S/N and they can tell you exactly.
SOURCE: Precor M9.21 Treadmill - Stops under load
This probably did not happened suddenly right? the problem is not the motor however you can easily check the blue capacitor for peace of mind. with the power disconnected, disconnect one side off the capacitor from the top. with a ohm meter put the 2 probes on the cap,you will ear a temporary beep sound from your meter, then reverse your probes on the capacitor and again a temporary sound that mean your capacitor is good and your motor will run OK.
Your problem is more then likely your run belt and bed assembly. When new, these are coated with a wax of some kind for slipping, has you use the machine wax wears off, and so is the belt. You can see a black rubber dust at the rear of the machine. And so resistance increase when pressure is applied on the running belt.
Just behind the on/off switch where the power cord goes in, there is a auto reset 15 amp breaker that trips when too must resistance against the motor increase the amperage over 15amps. At 7 min/m on your speed setting and if the belt is adjusted correctly with nobody on, the motor pull about 6amps, with someone like me 180lbs, the motor pulls an avg of 10amps with a new belt.
If you have a clamp amp meter you can test it yourself.
2 parts you will need to fix this; 50985-101 (bed assembly) and 36355-101 (run belt 17 X 110) This is real easy to install.
make sure these parts are for your machine model # as they did increased the width of their belt over the years
Since 1998 I had to replace these parts 2 times with an average of 3 people using the treadmill every day. This is a good machine and if everything else is good it's worth it. I paid $300 for these parts, i'm sure if you shoppe a little you can do better.
Have a good one
Ben
SOURCE: Precor 9.4 Treadmill Incline Problem
http://www.youtube.com/watch?v=MIIxoPtvhy8
I bought a used Precor 9.4 treadmill, but the incline adjustment
was not working.
So, I did the following.
1. Turn off, unplug the
treadmill and wait for an hour (this is for safety
2. Remove the
black motor cover
3. Observe the transformer to the right of the
motor and towards the belt ( I point to it in the video)
This
transformer converts DC electricity to AC electricity and the AC current
goes directly to the Incline motor which is in the black box towards
the front of the machine.
4. On mine the wires had come loose from
the transformer, they were soldered on very poorly, the wires are stiff
and you should be able to see 4 wires coming from the top of the circuit
board and plugging into the transformer, I had three of the 4 wires
loose.
5. If you are not comfortable working with electronics or
soldering DO NOT DO THIS REPAIR, you could get shocked very badly if you
just go poking around in there with metal objects, get a friend who
knows how to solder or hire someone.
6. It took about 5 minutes I
just heated up my $10 soldering gun from radio shack and soldered all
the loose wires that were about a millimeter away from the tabs on the
back of the transformer, and VOILA! The incline now works!
SOURCE: Where can I find a Precor 9.21 treadmill motor cover?
Do you know which version of the Precor 9.21 you have? There are a few different versions you can view here. Click on your version to view the parts list and look for "Cover, Motor" or "Motor Cover".
For instance, if you have the 9.21 (AYYZ), the proper motor cover is this part #5019749
However, this part #5005569 is listed as the proper motor cover for the 9.21 (F5), 9.21i (2X), 9.21s (F6), 9.21si (2Y), and a couple others. Make sure you have matched up your exact model number with the motor cover you need so do you not order the wrong part.
SOURCE: Parts for a PreCor 9.1 treadmill
go www. precor.com or www. fitnessrepairparts.com or www. treadmillspartszone.com
God bless your
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