When the end bearing plate of a garage door is not properly secured, it is common to see the end of a shaft wear. Left unattended, the end bearing plate can remain pitched and the bearing can cut off the end of the shaft.…
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The purpose of a snubber assembly is to raise the lip and suspend it long enough so that the lip can be lowered onto the back of a trailer. In this description, you’ll be viewing a Serco dock leveler.
Customers frequently ask us if it is possible to install the LiftMaster 8500 Openers on doors with low headroom.
The answer is “yes,” “no” and “yes” in some situations if you are handy.
The answer is “yes” if, by low headroom, you mean a garage door with the double roller top fixtures.…
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Garage door springs are made of wire, and they break because every time you open or close the door the wire bends.
This is easy to understand if you have ever bent a small wire or a paper clip to break it.…
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We are frequently asked, “Why is one of my garage door springs slinky and the other tight?” Or, “Why is one spring stiff and the other loose?”
The answer lies in the pitch of the spring wire. When a spring is coiled the wire is normally wound at a 90-degree angle from the spool or rod around which the wire is wound.…
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1. Secure the garage door in the open position.
2. Unplug the opener power cord.
3. Remove the cable from the bottom fixture and drum.
4. Turn the shaft if the cable is too tight.
5. Insert the end of the cable and wrap the cable around the drum.…
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1. Measure to assure you have the correct springs.
2. Unwind the unbroken spring or springs.
3. Remove the two center bolts.
4. Mark and loosen the set screws on the cable drums.
5. Slide the torsion shaft to the left and right to remove the old springs and install the new springs.…
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Spring bumpers are often needed on residential garage doors to help assist the door to close from the open position when a jackshaft opener such as the Liftmaster 8500 is used.
Without this extra thrust, the cables are likely to peel off the drums as the opener initially turns the torsion shaft, especially if the rollers are dry or if the door binds in the open position.…
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The following checklist is for maintenance technicians who can work from some type of lift. If you are working from a ladder you will alter some of the steps. Exercise caution when servicing any type of overhead type door as there are many dangers in servicing them.…
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On our Standard Garage Door Torsion Springs page we include a special offer for free hardware or free winding bars.
Since we started this we have had a number of requests for substitutions.
For example, someone purchasing one of our torsion spring conversion kits will sometimes ask to deduct the value of the free hardware from the kit.…
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