Tips for Modifying Stock Commercial Door Openers

There are times when the features of a stock commercial opener are not quite enough for the needs of the job. In this article we will look at some of the common modifications you can do to better serve the needs of your customers. We will specifically be looking at LiftMaster opener modifications, but other openers may have the ability to have the same or similar modifications.

WHAT IF I HAVE A HEAVY GARAGE DOOR THAT DRIFTS?

To help prevent a heavy garage door from drifting down in the opening we recommend installing an opener with a brake solenoid. Stock openers 3/4 H.P. or greater have brake solenoids installed from the factory. Continuous duty ½ H.P. openers will have to have a brake modification added at the time of order. Brake solenoids are available for both trolley and hoist openers and can come factory installed or added at the job site.

DUAL TROLLEY MODIFICATIONS ARE REQUIRED FOR A DOOR THAT IS 22’ OR WIDER.

A dual trolley modification provides equal support for wider doors and greatly minimizes the risk of damaging the top section of the garage door. To accomplish this the front idler is replaced with a sprocket that acts as a drive for the second trolley that is connected via a solid shaft. This modification is available for both trolley and hoist openers, but for hoist the modification must be factory installed.

WHAT DO I DO IF I HAVE LIMITED SPACE FOR AN INSTALLATION?

If you have limited side room LiftMaster offers a factory installed center mount modification for any jackshaft or gear head operator.

If the garage door installation you are completing has limited back room, you can get a minimum depth modification. For normal trolley openers the power head can be mounted next to the rail which will save you 18” of back room. If you are using a damp environment or water/oil tight modification with this modification it will save you 12” as the powerhead is a bit larger in this unit.

WHAT IF I HAVE AN INSTALLATION THAT IS IN A DAMP ENVIRONMENT, SUCH AS A CAR WASH?

LiftMaster offers a TEFC motor modification which provides a water and oil tight enclosure, a water and oil tight 3-button wall station and a nickel-plated chain. (Note: This is made to order opener so be sure to have all your correct specification at the time of purchase.)

ADDITIONAL MODIFICATION TO KNOW

  • NEMA 4/12 Modification – Watertight/oil-tight/dust-tight modification that includes a Dynamic brake, replacing the solenoid brake.
  • NEMA 4X – Known as the corrosion resistant modification and comes with a superior motor and includes a NEMA 4X controller enclosure.
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Safety Disclaimer: In order to see all procedures completely, there may be safety measures that are not taken by our actors. Be sure to follow any and all proper safety requirements and refer to your manufacturer’s installation manual for details. Your health and safety is the #1 concern. Failure to understand/follow the recommendations in the course could result in property damage, personal injury or death. While all efforts are made to provide accurate information and guidance, it is impossible to predict all door circumstances. Accordingly, the user agrees that the user of this video; products and information contained herein are at your own risk. In no event shall Service Spring be liable for any property damage, personal injury/death, or any other loss or damage that may result from your use of the information and products provided on this video. All information contained within this site is provided “as-is” without warranty expressed or implied. User assumes all responsibility/risk for use of information and products purchased. If you have any doubts about your ability to perform the work safely, we recommend you contact another door professional to complete your repair.

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