What is an adjustable leg? Upright Scaffold North America adjustable legs are used to level scaffolding on uneven surfaces. They also are used for getting over objects but never use the adjustable legs to gain height. If you need to gain height either raise the platform up or add another section. The adjustable legs are only used for leveling scaffolding or getting over objects.
Adjustable leg scratches:
Upright Scaffold North America adjustable legs can be released for a rapid adjustment by lifting and twisting the knurled ring. This will release this split threaded nut letting the leg slide out easily. Gravity itself should let the leg slide out but if it doesn’t, we have an obstruction. The adjustable leg is being held by either debris, dent in the frame or an over adjusted set screw. When pulling this adjustable leg out I keep feeling something dragging over the threads and then I could see evidence of scratching. At this point you would back off the set screw and the adjustable leg will slide out easily. Upright Scaffold North America suggests that when installing or readjusting the set screw you want to stick your finger up inside the frame of the scaffolding. If you feel the set screw going pass the inside wall of the frame back the screw off till it is flush with the inside wall of the frame.
Upright Scaffold North America suggests that you wipe your adjustable leg down with the light lubricant. This prevents oxidization and also helps in sliding the leg in and out of the frame. We also suggest that you take time to read your Safety manual http://uprighYestsna.com/safety/. If you have any questions please feel free to call us at 707. 799. 8902 and ask for Joe foot.
Adjustable leg conclusion:
If you’re having a problem with your adjustable leg sliding out easily one area to check is the set screw. Back the set screw off and try to slide the leg out. If it will not slide out easily now; there is another issue which will be discussed in another blog. We now hope you understand one issue that can happen to your adjustable leg if you over tighten the set screw.
As we like to say, “IF YOU NEED TO GET UP, GET UPRIGHT WITH UPRIGHT SCAFFOLD NORTH AMERICA.”
THE ADJUSTABLE LEG LOCK IS A MECHANISM THAT LETS THE ADJUSTABLE LEG SLIDE IN AND OUT OF THE SCAFFOLDING FRAME. Aluminum scaffolding cannot have more than 12 inches of adjustability in its legs. For the adjustable leg to have a true 12 inches of adjustability the leg needs to have 13 inches of thread (will talk about this in another section). The adjustable leg lock is a mechanism that unlocks a split threaded nut allowing the adjustable leg to slide in and out freely. When you’ve reached your desired length you lock it by pushing the outer ring straight down. This will engage the threads of the split threaded nut into the threads of the adjustable leg.
If for some reason the ring will not slide down just slide the leg in or out just a little. What is happening is you’re trying to mesh a thread on top of another thread. So by moving the leg either in or out a little bit the thread will slide into the threads of the leg.
How it happens:
The leg lock mechanism consists of a split threaded nut and a knurled ring that when lifted and twisted up releases the split threaded nut which expands out releasing its threads from the threads of the aluminum leg. This then gives you the ability to slide the aluminum threaded leg in and out of the base frame. This gives you the ability to level your scaffolding on un-even surfaces or to help you get over objects. The adjustable legs are never to be used to gain height. Please refer to your instruction manual.
Damaged adjustable leg lock:
A picture is worth a 1000 words regarding this damaged adjustable leg lock. The adjustable leg lock is held in by a set screw. As you can see the set screw was missing from the adjustable leg lock mechanism. The customer secured the leg lock mechanism with a wire wrapped around the adjustable leg lock mechanism and over the horizontal rung.
The customer I can only assume tried to fix this in the field. What happened is he wound up holding the ring to the leg lock mechanism open. So the leg was not secured in the frame and could slide out if the scaffolding were rolled over a negative area. All the customer needed was a set screw and a screwdriver to fix the problem.
I would highly recommend when it comes to parts of the scaffolding like the adjustable leg lock mechanism, adjustable legs, short pin, long pin interlock clips and bushings that the customer carries these with them at all times. The adjustable leg mechanism in the other mentioned above parts are field replaceable. So read your safety manual, carrier spare parts and the tools to make the repairs in the field.
As we like to say at Upright Scaffolds North America, “If you need to get up, get upright with Upright Scaffolds North America.”
How to replace your adjustable leg lock system on your aluminum scaffolding in the field:
If for some reason you damaged your Adjustable Leg Lock System on your aluminum scaffolding while in the field, don’t worry you can field replace it in 10 minutes. The adjustable leg lock system on the aluminum scaffolding has a setscrew that can be removed with either a screwdriver or Allen-ranch depending on the manufacturer.
Prior to removing the leg lock system you will need to remove the 12-inch threaded adjustable leg with the caster on the bottom of it. To do this you will need to unlock the leg lock system and slide the adjustable leg out.
Remove the adjustable leg lock system by removing the setscrew and sliding the adjustable leg lock system off the bottom of the scaffolding frame.
How to install your adjustable leg lock system on your aluminum scaffolding in the field:
Take your new adjustable leg lock system and slide it back on the bottom of the tube lining up the setscrew holes. Wipe off and clean the bottom of the scaffolding that you’re going to slide the leg lock system on to. Once you’ve lined the setscrew holes up screw the set screw in but do not over screw the setscrew. You can check this by putting your finger inside the frame and feeling where the set screw hole is and if the set screw is going past the inside of the frame you will need to back the set screw off till it is flush with the inside of the frame.
Now take your 12-inch adjustable leg with your caster on the bottom of it and slide it into the new adjustable leg lock system on the bottom of the frame. Test your adjustable leg lock system by sliding the collar down over the safety latches make sure the latches engage by trying to pull the collar straight up. If you cannot pull the caller straight up on your adjustable leg lock system; then you know your adjustable leg lock system is in good working condition.
Now you know how to replace your adjustable leg lock system on your aluminum scaffolding while in the field. If you have any questions please feel free to give us a call and as always
“If you need to get up get up right with Upright Scaffold North America”