How to Replace the Main Gear in a Garage Door Opener

It’s 6:00 AM as well as you are leaving for work. You press the garage door opener wall switch and listen to a subtle hum from your electric motor yet the door cannot relocate. If your garage doors springtimes are intact chances are you garage door openers primary drive gear has failed. You can quickly examine your drive gears by unplugging your garage door opener as well as removing the metal cover. The primary drive equipment is made from a white plastic that normally is the weak link in the opener. Lots of things could trigger this gear to stop working. Some reasons for wear are:

oGarage door out of balance (Springs broke or seeking change).
oChain to tight a.
oOld age.
oExcessive usage or high cycle.
oFactory defect or absence of oil at time of manufacture.

Replacing the big white equipment is an inexpensive, fast as well as simple do it on your own repair as long as you have a few simple hand devices as well as adhere to the safety and security precautions. These gears can be acquired online in a selection of levels of components.

Prior to you get started it is necessary for you to have a listing of the few simple tools needed to achieve this job:.
oHammer.
oHalf inch wrench or flexible wrench or pliers.
o3/8″ Outlet or Nut Driver.
o1/4″ Socket or Nut Driver.
o5/16″ Outlet or Nut Driver.
oFlat Standard Screwdriver.
o5/32″ Strike or similar.

~ CAUTION ~.
To avoid possible SIGNIFICANT INJURY or perhaps FATALITY from electrocution, ALWAYS Disconnect the power cable from your garage door from the electrical outlet before proceeding with any type of evaluation or repair work.

Step # 1.
Make certain your garage door opener is unplugged. This action guarantees that no one inadvertently attempts to open up or close the garage door while you are servicing it or you do not inadvertently turn on the door while servicing it.

Action # 2.
Disconnect the door from the external cart by manually pulling the red detach rope and also by hand shut the garage door.

CARE.
The Garage door NECESSITY be in the totally shut setting during all repair services and also evaluation.

Assuring that your garage door is shut will certainly guarantee that your door will certainly not drop or make any kind of movement that would certainly trigger injury or shock you. We advise that once the door is closed that you secure the door down using a vise grip or clamp above among the rollers to stop the door from being opened up from the exterior.

Step # 3.
Slacken the chain or belts tension by losing the stress nut on the garage door opener cart. Usually this is nut as well as could be changed with a 1/2 “wrench

.
Step # 4.

Get rid of the sprocket or belt pulley-block retainer cap. Typically this has a clip on the back if you push in it will certainly release.

Step # 5.
I constantly recommend noting the setting of the chain or belt to the gear before getting rid of. This can quickly be made with white out, tape or any other means. This action helps ensure that your chain or belt obtains re-installed in the appropriate setting and makes for fast and easy reference if required later on. Remove the chain or belt from the gear and afterwards move the inner trolley to the shut placement until it engages the external trolley. Place loose chain/belt on the end of the rail closest to the sprocket. I commonly duct tape the chain to avoid it from falling to the flooring and getting all turned and filthy.

Action # 6.
It is now time to get rid of both finish covers and the main housing. Completion cover are each attached by three or 4 1/4″ head screws that can be removed with a 1/4″ nut vehicle driver or outlet. Make certain to unplug the cord to the motherboard.

Step # 7.
Remove the retaining clip and the drive equipment for the limits. Additionally right now eliminate the restriction button assembly by pressing the sides just below the brace by the drive gears. There is no need to disconnect the cables as it is ALRIGHT to leave this limitation setting up hang by the wires. Do not make any kind of adjustments to the limit setting up screws, this will certainly guarantee that there is very little change needed to the limitations after you finish your repair work and run your garage door opener.

Step # 8.
Currently its time to get rid of the RPM sensor this can be conveniently done by disconnecting the cord harness and eliminate the RPM sensor from the protecting tabs.

Action # 9.
Separate the red, blue as well as white wires from the motor. It is essential that you note where these cables go. The exact same shade cables most likely to the exact same terminals on the capacitor red/red and blue/blue.

Action # 10.
Get rid of the 4 5/16″ hex head screw’s that hold the motor setting up to the frame of the garage door opener. Make sure to place your hand under the electric motor prior to eliminating the last screw to prevent the electric motor from dropping. Move the motor assembly off the drive shaft and area in a refuge. (Not on top of the ladder for obvious reasons).

Step # 11.
Get rid of the 3 hex head screws holding the sprocket assembly to the primary framework using a 5/16″ nut driver or outlet. Now it is time to decide if you wish to replace the major gear only or the entire gear or all chain drive models 1984 to existing.

Action # 12.
Miss this action if you are changing the whole equipment as well as sprocket or wheel setting up. If you are going to change the drive equipment sustain the driveshaft on a block of timber and drive the lower roll pin/Tension pin out with a 5/32″ punch. See photo example below.

Step # 13.
Remove as well as change the worm equipment. It is not essential to replace the worm gear unless it reveals indicators of wear. If you want to replace this equipment remove the shaft collar with a 1/8″ hex wrench. Please make sure to keep in mind the area of each of these components as you take apart so you could re-install in correct order. When you obtain your gear package, you will discover there are parts not used in your model this is due to the fact that these kits are global and work with lots of models of Sears, Craftsman, Wayne Dalton, Master Technician, Liftmaster, Real Value as well as other brands of garage doors openers. Only replace the components that are made use of on your garage door opener. Eliminate the 3 nuts that hold the motor to the framework and after that get rid of the worm gear. Set up the brand-new worm gear making certain the roll pin is effectively sittinged in the new equipment. Re-install other elements backwards order. After you finish this assembly I advise you lube the worm gear so you do not neglect.

Action # 14.
Begin reassembly in reverse order. Make certain to completely lube the major drive gear and that oil gets on each and every tooth. Attach the gear and sprocket or sheave setting up to the primary chassis with the three 5/16″ head screws. Mount the assembled motor framework to the framework with the 4 5/16″ head screws and reattach the red, blue and white cords; now install the limitation assembly as well as the limitation drive equipment making sure they harmonize properly. You could currently set up the RPM sensing unit as well as reconnect cables. Install the metal cover and end panels, make certain to plug in the circuit card and also reconnect picture eye as well as push button wires.

Action # 15.
Reconnect the power cord to the opener and cycle the opener up until the sprocket completes a complete clockwise cycle. The cart has to remain in the totally down position before mounting the chain. Currently you can eliminate the tape from the rail and also re-install the chain. The chain and also sprocket referral mark should be close to aligning. Tighten the chain to make sure that the chain is 1/2 “over the base of the rail at omphalos for “T” style rails and also 1/4″ for square tube rails. Safeguard the chain tightening up lock nut.

WARNING.
Note when changing as well as evaluating your garage door electric motor it is essential.
to make sure no one is in the course of the moving door.

CAUTION.
It is very important to understand when evaluating your garage door opener it is possible to over cycle the electric motor.
as well as have the motor momentarily overheat and stop operating.
To stop this shot and also not operate the door opener greater than 10 cycles.
without offering it 5-10 mins to cool off.

Step # 16.
Now run the opener and also examination to see if the door available to the proper placement and also near to the correct position. If you need to make changes utilize the travel modifications screws making fine adjustments. I recommend just making minor adjustments 1/4 turn or less each time. For referral one complete turn of the screw equals approx 2″ of traveling on 1/2 as well as 1/4 HP designs and 3″ on 3/4 HP designs.

Step # 17.
Once you have your doors take a trip change correct it is time to readjust the force. This is the pressure that it requires to guarantee your door opener will certainly operate securely. The initial step in this procedure is to inspect the down pressure. With the door open merely activate the garage door opener and when the door reaches the half method factor grasp the door from the bottom as well as try as well as stop it. If the door is hard to stop or does not stop reduce the down force adjustment in little increments till it turn around after sensible force. If the door does not close as well as the light starts to blink raise the down pressure modification in little increments up until you can inspect the turnaround at half method. Readjusting the force does not ensure that your driver will certainly turn around on 1-1/2″ item at the flooring. For additional information on changing the turnaround at the floor see your proprietor’s guidebook or call the maker. Find the best garage door repair business near you today!