Our Volvo haul trucks have 5 computers in them. Volvo states in all the repair manuals and decals on the machines warning to unplug the 5 computers before welding on the machine. As an aside. Trucks and trailers and for that matter autos are not grounded to earth. A man I knew for many years got killed when his dump body hit some high tension lines while dumping a load of gravel. The resulting jolt set all 18 tires ablaze and melted every piece of aluminum on the truck and trailer. The current was so massive it welded the steering linkage together and melted the oil pan. His body was found in the cab with his hand on the dump lever.
One small loss of contact with ground will force current to find the next available path That next path will be anywhere you don't want it to. Ask any welder with more then a month of experience what happens if his feet are damp and he tries to change a rod. Even though he is grounded he will still get that twinkling in the toes. Every welder I know always has dry socks.
Pete
I pray every day I break even, Cause I can really use the money!
I started with nothing and still have most of it left!
The welding arc can even provide interferrence to FM radios. When flying in the northeast sometimes you could hear a welder breaking up the squelch. Another item would be either subway cars arcing over or the GG1s arching over on the 12KV lines.
edblysard [snipped] Stirrups and ladder rungs, along with hand brake wheels seem to be the attachment point of choice for the dummies in the industries and plants to hook their tow rope to when they want to move a car. For some reason, they never want to use the hole or bracket designed for just that use, so we find a lot of brake wheels and bottom grab irons all bent to heck. And because the bottom grab iron sticks out the farthest, it always seems to be the part of the car that gets wiped out whenever there is a close clearance issue. Our carmen have a neat tool they carry, it looks like a pry bar with a bearing on or at the crook of the bend, they can straighten a bent grab iron in a few seconds with it, and as long as the rivets or bolts are still firm, it's good to go.
For some reason, they never want to use the hole or bracket designed for just that use, so we find a lot of brake wheels and bottom grab irons all bent to heck.
And because the bottom grab iron sticks out the farthest, it always seems to be the part of the car that gets wiped out whenever there is a close clearance issue.
Our carmen have a neat tool they carry, it looks like a pry bar with a bearing on or at the crook of the bend, they can straighten a bent grab iron in a few seconds with it, and as long as the rivets or bolts are still firm, it's good to go.
Hydraulic [powered] Hand-Hold [grab iron] Straighteners, 3 to 10 ft. long - http://www.rrtools.com/CarMaintenance/HandHoldStraightener.asp
[hand-powered] Universal Straightening Tool - http://www.rrtools.com/CarMaintenance/StraighteningTool.asp
And thanks once again, Ed - for the quite evident time and thought that went into this comprehensive reply (and others). You must love the business, too - why else spend this much time on it ?
- Paul North.
blue streak 1 The welding arc can even provide interferrence to FM radios. When flying in the northeast sometimes you could hear a welder breaking up the squelch. Another item would be either subway cars arcing over or the GG1s arching over on the 12KV lines.
Paul_D_North_Jr What I'd really like to see from this effect is some kind of electronic field interference gizmo to remotely and quietly 'toast' into an enforced silence those overbearingly loud 'thump-thump' car stereo boom boxes . . .
What I'd really like to see from this effect is some kind of electronic field interference gizmo to remotely and quietly 'toast' into an enforced silence those overbearingly loud 'thump-thump' car stereo boom boxes . . .
Don't tempt me....
Our company has worked on a couple of projects that had the potential to be very disruptive to toast the car stereo boom boxes - however the toasting would not have been quiet had the stereo been on at the time.
- Erik
erikem [snipped] . . . the toasting would not have been quiet had the stereo been on at the time.
[My "quietly toast" meant at the gizmo's end, so it would be hard for the noisy ones to tell who had zapped their boom boxes . . . ]
If your company ever needs a test site for that aspect of those projects, we need to talk . . .
erikem Paul_D_North_Jr: What I'd really like to see from this effect is some kind of electronic field interference gizmo to remotely and quietly 'toast' into an enforced silence those overbearingly loud 'thump-thump' car stereo boom boxes . . . Don't tempt me.... Our company has worked on a couple of projects that had the potential to be very disruptive to toast the car stereo boom boxes - however the toasting would not have been quiet had the stereo been on at the time. - Erik
Paul_D_North_Jr: What I'd really like to see from this effect is some kind of electronic field interference gizmo to remotely and quietly 'toast' into an enforced silence those overbearingly loud 'thump-thump' car stereo boom boxes . . .
It is a shame that the people who believe that everyone else likes what they like has to continually increase the sound level of their blasters as they gradually lose their hearing.
I have been tempted, when a blaster has stopped by my car to tell the blaster operater that I do have my own sound system, so he does not need to supply me with entertainment.
Johnny
Actually the technology would be put to better use as a 'cell phone blaster'. Triggered against those who prowl the highway with the cell phone at their ear and their attention on their converstion rather than the events of the highway. 10 seconds of 150db noise blasted at their eardrum from close range ought to cure them....
Never too old to have a happy childhood!
Our community is FREE to join. To participate you must either login or register for an account.