20 Most Recent Precor 9.21 Treadmill - Page 2 Questions & Answers

Use silicone to lube your treadmill.

tighten the back bolts to check tension lift the sides of the w/belt in the middle . sides should be 2-3 inches high

see this steps and fix it. God bless youError 40, No Lift Motion Detected Probable Cause 1. Blown lift fuse in lower PCA.2. Lift motor is physically jammed and not able to move.3. Bad lower PCA.4. Bad lift capacitor.5. Bad lift motor winding.6. Bad interconnect cable between upper and lower PCA.7. Bad upper PCA. Corrective Action

1. Check the lift fuse from the lower PCA. Using an ohmmeter, the fuse should measure 1 ohm or less. If the reading is significantly high, replace the fuse. If the fuse is open, refer to steps 3 and 4 before continuing.
2. Disconnect the lift motor from the ramp (elliptical) or lift platform (treadmill). If the lift nut or lift tube is jammed against the motor housing, turn the lift tube or lift nut away from the motor housing. If the lift was jammed, refer to step 3 before continuing. Calibrate the lift motor per the proper procedure for the unit being serviced and reattach the lift motor to the ramp (elliptical) or lift platform (treadmill). NOTICE: You must find and repair the cause for the jammed lift. Only re-calibrating the lift motor will not solve the problem.
3. One of two modes can cause the lower PCA to fail. The lift switch could fail in an operated condition. If this happens the lift will move (either up or down) as soon as the unit powers up. The usual result is that the lift will be physically jammed as explained above, and probably also being cause for the lift fuse to blow. The lift switch could also fail in an open condition. If this happened, the lift would not operate in one direction. If either of these conditions occur the lower PCA needs replaced.
4. Most units have the lift capacitor mounted inside the lift motor, and others use external lift capacitors. This information applies to units with the external lift capacitors. If the lift capacitor is shorted the lift fuse blows. Check the capacitor for a short using an ohm meter. Disconnect the capacitor from the lift motor and test. A good capacitor reads in the millions of ohms. Replace the capacitor if the reading is significantly low. Capacitor can also fail in the open condition which would result with the lift motor trying to run but not having normal power. Test the capacitor by measuring AC voltage across it. A good capacitor will read AC peak voltage while an open capacitor reads AC RMS voltage.
5. When a lift motor winding is bad the lift will not operate in one or both directions depending upon the exact fault in the motor. Check the lift motor winding with an ohm meter. AC lift motors have a split winding (3 wires) and DC lift motors will have a single winding. Both windings must be checked on an AC lift motor. Normal winding readings could vary anywhere between 1 and 60 ohms, depending on the lift motor being tested. See the proper service manual for the motor being tested.
6. Test unit with a known good interconnect cable. Replace the interconnect cable if necessary.
7. Test unit with a known good upper PCA. Replace the lower PCA if necessary.

worn running belt and deck. You can try to clean the belt a bit using a clean towel and running it under the belt and stand on both ends. turn the tread on and let it run for a minute or so at 2mph. hit stop and pull the towel out. make sure the tread doesn't share a circuit with the fridge or a freezer, etc. As they wear the amp draw gets greater and if its sharing the circuit it will trip more and more. Understand, please, that every time it shuts off it is because of heat in the electronics from the extra work it is doing to push/pull that running belt over an increasingly sticky surface. The cost of reoplacing a deck and belt (the deck may be two sided and be flipped) is a lot less than eating the lower power control board and/or a drive motor. Also, do the drive belt while you are doing the run belt. Don't scrimp on that $40 as it will haunt you later.

if your sistem ( has batteries, replace by new ones, but clean the contacts batteries from dirty, oxide, etc use contacts cleaner and tight the spring with pliers)>2) tight the ribbon cable inside the display board.3) tight and clean the upper and lower connector from display.4) adjust the REED swtich. see the diagram attached.God bless you

go to www.treadmilldoctor.comGod bless you

go to www.fitnessrepairparts.comGod bless you

The size should be written right on the motor