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Well poo poo, I forgot about the field excitation for voltage regulation. I'm used to AC motors, not so much on the generation side. Learned something new.
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Jul 2, 2016 01:18
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DocCynical posted:Well poo poo, I forgot about the field excitation for voltage regulation. I'm used to AC motors, not so much on the generation side. Learned something new. Its cool, I also know the permanent magnet alternators exist, popular for homemade windmills.
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Jul 2, 2016 01:37
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CommieGIR posted:Its cool, I also know the permanent magnet alternators exist, popular for homemade windmills. And motorbikes.
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Jul 2, 2016 03:41
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CommieGIR posted:I rebuild all my own alternators. Where do you source your parts? I briefly explored this option for the 4A-GE but became frustrated trying to even pin down what model alternator I had. Was easier for me to just buy a replacement, even though I'm pretty sure a set of brushes would have cured me.
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Jul 2, 2016 13:12
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Slavvy posted:And motorbikes. My old 350s take advantage of the extra weight of the magnets by using the rotor as the engine's flywheel 
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Jul 2, 2016 16:47
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Beach Bum posted:Where do you source your parts? I briefly explored this option for the 4A-GE but became frustrated trying to even pin down what model alternator I had. Was easier for me to just buy a replacement, even though I'm pretty sure a set of brushes would have cured me. Usually all you need is brushes, you can find them on Google pretty easily.
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Jul 2, 2016 17:57
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Sagebrush posted:My old 350s take advantage of the extra weight of the magnets by using the rotor as the engine's flywheel That's clever thinking, nothing unnecessary.
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Jul 2, 2016 20:24
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CommieGIR posted:Usually all you need is brushes, you can find them on Google pretty easily. Most parts stores carry them also, but the people behind the counter do not know how to look them up
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Jul 3, 2016 06:31
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HFX posted:Most parts stores carry them also, but the people behind the counter do not know how to look them up This is why you find and patronize the small auto electrical rebuild shop near you. I needed brushes for my generator, and was having all sorts of grief from the local parts houses. But I found a small local shop that just does starters alternators and generators, brought in the backing plate and said "Brushes for a Ford generator." The dude asked "early or late?" and a moment later and a couple bucks lighter I had the right (late) brushes. Specialty places are for sure the way to go.
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Jul 3, 2016 06:56
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Beach Bum posted:Where do you source your parts? I briefly explored this option for the 4A-GE but became frustrated trying to even pin down what model alternator I had. Was easier for me to just buy a replacement, even though I'm pretty sure a set of brushes would have cured me. I usually buy from https://www.aspwholesale.com. they have a make/model/year lookup tool that is *mostly* accurate.
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Jul 3, 2016 13:54
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Jul 8, 2016 02:28
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Well, it won't back off? 
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Jul 8, 2016 04:20
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This happened to me between Atlanta and Cleveland. I heard it pop off midway through Tennessee, (as the nut took the hub cap with it) but didn't realize what the pop noise meant until a day after I'd arrived. Brake calipers are a helluva thing. 
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Jul 8, 2016 04:29
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NoWake posted:This happened to me between Atlanta and Cleveland. I heard it pop off midway through Tennessee, (as the nut took the hub cap with it) but didn't realize what the pop noise meant until a day after I'd arrived. Brake calipers are a helluva thing. 
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Jul 8, 2016 14:36
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Also, that was done by a repair shop and not someone in their backyard.
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Jul 8, 2016 14:42
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HAHAHAHAHA man that's hosed up. I would hate to be the next guy that has to deal with that.
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Jul 8, 2016 14:54
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GnarlyCharlie4u posted:HAHAHAHAHA man that's hosed up. Considering the amount of swearing at "the last guy" that goes on already in my shop, this would be clocked immediately as a prank. There'd be no way to claim it was anything but.
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Jul 8, 2016 15:08
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NoWake posted:This happened to me between Atlanta and Cleveland. I heard it pop off midway through Tennessee, (as the nut took the hub cap with it) but didn't realize what the pop noise meant until a day after I'd arrived. Brake calipers are a helluva thing. Holy loving poo poo, you're lucky the wheel stayed on. Must be some hella strong caliper slide bolts/pegs.
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Jul 8, 2016 16:35
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The wheel bolts would still have held the wheel and rotor to the bearing. That would have just let the CV end wander in and out of the splines. If the bearing had failed, the caliper would have seen a lot more unusual loading.
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Jul 8, 2016 16:52
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On almost all unit bearings, the two bearing cones are just pressed onto the outside of the splined tube section of the hub, and without the axleshaft to preload the bearings and in fact hold them onto the hub, the inboard cone will usually shamble off the end of the hub and then the rotor/hub/wheel go walkabout. Very common on jeeps when someone doesn't understand the care and feeding of unit bearings and leaves the stub axleshaft out or the axle nut uninstalled for one reason or another (usually no axleshaft installed trying ot get home from the trail after breaking an axle.) Here is how it ends:  And here's briansmobile1's take on it: https://www.youtube.com/watch?v=JMyTWMnOO0s
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Jul 8, 2016 16:59
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kastein posted:And here's briansmobile1's take on it:  Yeah, I knew that the CV axle acts as a essential part of keeping the bearing centered and taking load off of it, but drat that thing chewed up.
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Jul 8, 2016 17:15
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I like that one lonely bearing. He's all "where'd my friends go?" 
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Jul 8, 2016 17:22
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kastein posted:Very common on jeeps when someone doesn't understand the care and feeding of unit bearings and leaves the stub axleshaft out or the axle nut uninstalled for one reason or another (usually no axleshaft installed trying ot get home from the trail after breaking an axle.) I saw my friend's neighbor do this in high school. He took the front axle shafts on his TJ out for whatever reason and did not realize that the big nut was important. Came around a turn in front of my buddy's place pretty hot and the wheel just took off across a field. Wish I had pictures or video because it was just so excellent to see.
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Jul 8, 2016 20:40
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Alabamarama posted:I saw my friend's neighbor do this in high school. He took the front axle shafts on his TJ out for whatever reason and did not realize that the big nut was important. Came around a turn in front of my buddy's place pretty hot and the wheel just took off across a field. Wish I had pictures or video because it was just so excellent to see. There was a incident a few years back where a jeep guy broke an axle shaft while offroading. He pulled the whole shaft and tried to drive home. The unit bearing seperated at highway speeds causing the jeep to flip and kill him.
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Jul 8, 2016 22:39
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Original rotors tend to be held on with retaining screws, which always freeze up. Usually, you can whack the rotor with a sledgehammer and pop them right off, but the dust shield behind the rotors on a 2004 C240 make that an impossible angle without a lift. I tried to drill it out and ended up with one mechanical failure wrapped in another. 
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Jul 9, 2016 05:55
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Did this today. My ears hurt, and we never found the 3rd piece.
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Jul 10, 2016 03:45
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God drat, that's gonna take like 3 tubes of JB weld.
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Jul 10, 2016 03:49
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...And an A-Treat bottle.
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Jul 10, 2016 05:12
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Crustashio posted:Did this today. My ears hurt, and we never found the 3rd piece. The gently caress did it start as?
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Jul 10, 2016 06:20
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iwentdoodie posted:The gently caress did it start as? I think the bender.
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Jul 10, 2016 10:14
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Obviously, but some of us don't know what it looked like.
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Jul 10, 2016 16:17
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So we looked at my buddy's 2002 VW 1.8T Jetta wagon's timing belt: * Couldn't get the harmonic balancer off because one of the bolts was stuck and another was rounded off in the center. He drove it home (10 miles) and is getting into a shop ASAP. The Jetta has 241k miles on it and that is very likely the original belt. *Yes, this is the same as the one on /r/justrolledintotheshop
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Jul 10, 2016 21:09
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scuz posted:So we looked at my buddy's 2002 VW 1.8T Jetta wagon's timing belt: Triggered. 
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Jul 10, 2016 21:10
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DocCynical posted:Well poo poo, I forgot about the field excitation for voltage regulation. I'm used to AC motors, not so much on the generation side. Learned something new. I just wanted to take a moment to say the unless you're in an explosion proof area that brushless exciters on large synchronous motors (>1000Hp and voltages >600v) are a tool of the devil. Constant. Tension. Brush. Holders. Plus routine inspection and cleaning by qualified personnel. And making sure that the carbon brushes are cut in to give good surface contract with the slip rings. Three-Phase fucked around with this message at 23:02 on Jul 10, 2016 |
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Jul 10, 2016 23:00
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Godholio posted:Obviously, but some of us don't know what it looked like. Ah, I had initially assumed it was a shattered pipe, so I thought others might be making that same mistake. Some internet detectiving tells me it was probably one of these:  I'm guessing that little U bracket holds the short end of the pipe in place, while the long end is pulled around the big mandrel? E: Crustachio the ebay listing I got that pic from is here if you guys need to get a new one.
Fender Anarchist fucked around with this message at 23:14 on Jul 10, 2016 |
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Jul 10, 2016 23:12
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Yes, it's the saddle that holds the the tubing in place while it gets bent around the shoe. https://www.youtube.com/watch?v=AZg0pJbjYbE Ours was a manual pump bender but the tooling is exactly the same. Greenlee still exists as a company so I'm hoping we can just buy the piece based off the part #. We ended up using the saddle for the next size up and a half moon 1.75 x 0.125 wall DOM to fit the 1.5 OD DOM. Crustashio fucked around with this message at 00:28 on Jul 11, 2016 |
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Jul 11, 2016 00:22
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Ah, ok...that's why I couldn't figure it out. It's a piece.
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Jul 11, 2016 02:29
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kastein posted:... I'm the legion of comments saying "This is just a bearing failure shaft had nothing to do with it. I took out the shaft from my [completely different vehicle] and drove it for thousands of miles with no problems."
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Jul 11, 2016 03:46
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Three-Phase posted:I just wanted to take a moment to say the unless you're in an explosion proof area that brushless exciters on large synchronous motors (>1000Hp and voltages >600v) are a tool of the devil. Luckily I Just take care of motors small enough that you can throw them out when they fail, like the little 5HP 600V blower motor in a potable water plant that pulls 5, 5, and 4.8A for some reason. Previous blower motor shaft, mechanical failure on its own. Something got a little toasty. Image linking not working for some reason DocCynical fucked around with this message at 05:30 on Jul 11, 2016 |
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Jul 11, 2016 05:27
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Blue Footed Booby posted:I'm the legion of comments saying "This is just a bearing failure shaft had nothing to do with it. I took out the shaft from my [completely different vehicle] and drove it for thousands of miles with no problems." How about a traditional taper bearing that, instead of being pre-loaded by the locknut, is instead pre-loaded by a shim of specific thickness which sits between the two bearings? Cause that's what a kia rio has!
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Jul 11, 2016 05:31
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