1999' JLG 450A Articulating Boom Lift

[DinoDoesStuff]

Ignorant people like JetMechMA underline the need for IPAF training and PAL as proof of competence to operate MEWPs in the workplace. Thankfully, the system keeps idiots away from the MEWPs and creates a safe working environment for those who have bothered to train. If JetmechMA could understand the schematic decals he would learn that at full height and extension a JLG 400S (his reference machine) can carry twice as much load than full ext at horizontal. JetMechMA's theory totally busted!

[JetMechMA]

@DinoDoesStuff: " why didn't the articulated boom fall over at full height? DOH!"

JM: He never WENT to full height straight up. DOH!

[JetMechMA]

@DinoDoesStuff The decal is legible, You are trying to use that as an excuse. It's legible and you are dodging. The decal backs up my comment which was of a generic nature to not go straight up in a boom-lift because it could tip over. I further said to use the facrtory operator's instructions. YOU simply tried to get people to go by your opinion. I said go by the operator's manuals and the factory instructions. YOU said to just go by YOUR opinion. My comment is more acccurate.

[JetMechMA]

@DinoDoesStuff I never bad mouthed the equipment, I said to be careful using it, that's all. And in just exactly the same way that you can't comprehend what you read out of the user's manual, you failed to comprehend what you read in my comment.

[JetMechMA]

If you look at the video of the JLG company demo of the 40ft boom lift, at 10:48 the camera zooms in on a graphic warning sticker that tells you not to go straight up in the boom. It's right there on the machine itself. It's a JLG company demo video.

[DinoDoesStuff]

@JetMechMA What is the video title?

[JetMechMA]

@DinoDoesStuff "Product Review: JLG 400S Boom Lift"

[JetMechMA]

@DinoDoesStuff The warning sign actually says "Tip-over Warning"

[JetMechMA]

@DinoDoesStuff It is NOT stable in all boom positions. That's an incorrect statement. The warning label tells you what range the machine is stable in, assuming on level ground. The warning label that I pointed out has nothing to do with uneven ground. That label is found in the basket by the operator's controls. The devil is in the details and you should study them well for safety's sake. JLGs are fabulous machines, when operated according to manufacurers instructions, being in good repair.

[JetMechMA]

@DinoDoesStuff You are reading the manual but don't fully comprehend it. They would not place the warning label on the machine unless it was necessary to warn people of actual potential danger. What you have is complacency. Complacency is one of the 12 dirty dozen human factors in safety. You think you know, but might be going on a wrong assumption. That's all I'm saying.

[JetMechMA]

@DinoDoesStuff Again, you are reading, but not comprehending. You spoke of fulcrums and center of gravity...if the boom is straight up and the mount point is outboard of the stabilizer (the wheels in this case) then the center of gravity is shifted outboard of the stabilizer. The warning label shows LESS than straight up as the safe operating range, like I said. And again, the warning label backs me up. I saw this in a JLG factory safety video at work. Why would I make this up?

[JetMechMA]

@DinoDoesStuff Why is it necessary for you to call it a silly statement? I'm not trying to threaten your appearance as a knowledgeable person, only to repeat the safety information that I am aware of from a JLG factory safety video training. I operate the 40 and 60 ft basic non-articulated boom lifts daily. JLG tells me not to go straight up. That's good enough for me. I advise others to also follow manuacturers instructions closely.

[JetMechMA]

@DinoDoesStuff Sounds good. I would consider the matter settled with whatever they say. If they say that the 40 and 60 footer non-articulated lifts can go straight up, then they are the factory and they would know.

[JetMechMA]

@DinoDoesStuff It depends on exactly what question are you asking of JLG. What exactly did you ask them?

[JetMechMA]

@DinoDoesStuff On the 400s (which we have where I work) just LOOK at the elbow of the boom. It's actually mounted AFT of the rear wheels. When turned to the side its definitely going to be WAY outboard of the wheels. It's going to be hanging out in space. I think the warning label about "Tip-over Hazard" backs me up on this. The angles shown on the "Tip-over Hazard" label are good for all rotated positions of the machine. I wouldn't go beyond those angles in ANY position.

[DinoDoesStuff]

Extract from the manufacturers operating manual: 3.3 OPERATING CHARACTERISTICS AND LIMITATIONS "Stability - This machine as originally manufactured by JLG Industries Inc., when operated within its rated capacity on a smooth, firm and level supporting surface, and in accordance with the instructions provided on the machine and this manual, provides a stable machine for all platform positions." I rest my case, fully supported - any claims of instability is pure, uninformed, nonsense!!

[JetMechMA]

@DinoDoesStuff "when operated....iaw instructions in this manual" Look guy, the safety video I'm talking about is a JLG factory safety video. They said not to go straight up because it shifts the center of gravity too far aft. The counter weight is already aft and if you put the boom straight up then everything is aft because the boom is mounted aft of center...all the weight is aft.

[tbob404]

i did

[JetMechMA]

Going straight up in a boom lift can be very dangerous. It shifts the center of gravity towards the back where the boom pivot is mounted, which could cause the whole vehicle to tip over backwards. It doesn't look like it at a glance, but the way the boom is mounted, makes the vehicle back heavy when extending straight up. Don't do it. Be safe out there.

[tbob404]

@JetMechMA Yea, they tip over at the drop of a hat. NOT!!! They actually make them to NOT tip over.

[JetMechMA]

@tbob404 You should read the official safety literature before you operate one of these lifts.

[DinoDoesStuff]

@JetMechMA I would be interested in your source of information - post a link if you have evidence to support your claims.

[JetMechMA]

@DinoDoesStuff What do you mean "support your claims"? I'm not making any claims. I'm simply relaying safety information from the manufacturer. Boom lifts are made for reaching out at elevated heights. They really aren't made to be used straight up. It depends on the particular model. But generally speaking, it isn't recommended to raise straight up in a boom lift because it's made for reaching out. The center of gravity is way aft when you go straight up. That's from our company safety rep.

[JetMechMA]

@DinoDoesStuff You are WRONG. Going straight up in a boom lift CAN place the center of gravity such that it tips over. It depends on the model, but it CAN tip over by going straight up. LIKE I SAID, a person would be wise to read the factory authorized operator's hand-book before using one of these things. It is dangerous to tell people that they can go straight up because you could mislead them into tipping over.

[DinoDoesStuff]

@JetMechMA I am not arguing with you - simply correcting an erroneous statement. I have posted an extract from the operators manual - you may wish to bring it to the attention of your company safety rep who can use it as the first step to retraining himself. Chill dude!

[JetMechMA]

@DinoDoesStuff We have 40 and 60 foot JLG boom-lifts and JLG said not to go straight up in them. Argue with JLG.