There is no way that that shaft will run true to the centrelineof the gearbox. They probably dont drive fast so the vibration wont be noticed. And itll get torn up with overloading anyway. Love to watch the work skills with what they have. Well done . Greetings from Australia
у меня каждый раз сердце замирает - когда они стружку руками снимают. я один раз видел, как паренек потрогал стружку, просто потрогал, реки кровищи на всю жизнь отучили.
Very interesting video on how to repair drive shafts - the one thing - you never see the drive shaft working - when they fix something I would like to see it working
Lol looks like a previous repair with sub par materials got twisted up like a pretzel and snapped off again in the same spot. That's one way to provide yourself job security, I suppose lol. Or, it could be a torque limiting safety feature, making it break in a predictable, easy to repair spot, in stead of screwing up the much more expensive gearbox or something. Either way, it's brilliant.
No sir, earlier someone had installed a piece of indigenous pipe, so that pipe broke, now we have installed a imported pipe, now it will not break. Thanks
I hope that arc welder ground lead is grounded to the piece he's welding and NOT clamped to the lathe. If the ground is clamped to the frame of the lathe all of the current is flowing through and arcing across the headstock bearings, that will damage the bearings.
@@thepubliceye Why would you ask that? It's obvious that what he's doing is his job and he's doing the best with what he's got to work with. What I'm saying is a cautionary tale of why you should not ground the work through the body of an expensive lathe because the current flow will damage the bearings eventually via arc pitting between the balls/rollers and the race.
I understand that's one of those things that "Can Happen" but in reality seldom ever do. With roller bearings as tight as the lathe head it just doesn't happen. In addition to the rollers, there are a lot of steel gears and even a sleeve bushing.
@@thepubliceye I don't want to come across as argumentative or mean any disrespect to you but what I described is a real thing that happens and I was there when it was happening. Mechanics back in the 1980s working on Chrysler vehicles has a streak of bearing failures namely their front wheel bearings, we would just replace the bad bearings and the vehicle would return months later with the same problem. This happened frequently enough to where Chrysler engineers issued a TSB - Technical Service Bullitin when the figured out the cause of the premature bearing failure. There was no internet back then and mechanics got their 'critical' repair info via the TSB and that one directed us to look for loose or missing body ground cables/wires and to fix that issue while replacing the bad bearing. Over a period of time that problem once corrected went away. Peace
The way these trucks are so often overloaded and abused makes me realize why they just continue to replace with crummy stuff. It isn't really worth the cost and shipping for new replacement. My hat is off to these guys who create some pretty amazing stuff with old equipment. They make it work with what they have to work with. No waiting around for someone in a government agency to "save them". I'm wishing I was well off enough to send a c-111 full of safety gear and boots to these guys though 🙂.
All things relative this is a clean shop and some of the cleanest lathes also. That said I see shafts going into the lathe and not once have I seen anything wiped of floor sand. However if the a market accepts the results I guess it’s good enough, who am I to say.
I built Rockwell drive shaft and Spicer drive shafts at Mack Trucks manufacture plant and at freightliner dealer ship and thats not how we repaired or built them Biggest error is splicing the tube If you noticed where it was twisted it had already been spliced next there is a indexing arrow on the stub that aligns with the slip tube that aligns with the yoke at the other end before welding ( the yokes will never align properly) true hacks that dont know what they are doing
Индийцы до луны благополучно долетели а вот УМНЫЕ ПРАВИЛЬНЫЕ СКРЕРОНОСНЫЕ расеянцы об луну распиздячились ОЙ ОЙ А ПАЧИМУ А ЧТО СЛУЧИЛАСЬ ВСЁ ПРОСТО ПОМЕШАЛА ЛИШНЯЯ ХРОМОСОМА ИЛИ ЖЕ ЯЙЦА ТАНЦОРУ ПОМЕШАЛИ
Might this failure have something to do with serious and relentless overloading? That’s also why they’re constantly repairing cracked springs, axle/diff housings and failed trans-axles. But they do what they have to with what they have in often clever ways.
А ТЕБЕ НЕ ПОХЕР СВЕРНЕТ НЕ СВЕРНЕТ КОГДА И ГДЕ СВЕРНЕТ ПРИНЕСЛИ ПРОСЯТ СДЕЛАЙ ЧЕЛОВЕК СДЕЛАЛ ты если руку сломаеш к врачу пойдеш и будеш лечиться хотя шанс перелома в дальнейшем все равно останется
The reality of a mostly capitalist world is that the cheaper the relative cost of labour, the higher the manual skill base in the population. In the West this would not be repaired unless it was literally impossible to get from a stores somewhere because the cost would be prohibative. My father was an apprentice mechanic in Europe in the 1930's when he was 14yr old, by 15yr old he was making his own white metal bearing for car engines. At 19 he was a chief aircraft mechanic with a team of 8 men working for him. He could do this as shown on the video. But I lost those skills, as already by my 16th birthday when I started as a mechanic we replaced, we rarely repaired.
As always great video. It's interesting to watch you guys repair stuff instead of sending it to the junk pile like most places these days. I'm sure the customer was happy to be back on the road asap. 👍
I have seen other channels do similar repairs with lots of high tech equipment, and the result is no better than this. Very enjoyable to watch your skill and ingenuity
@@The_Black_Sheep95 True but it's hard to grasp just how cheap labor is in Pakistan. It's so much less expensive to repair there. It used to be that way in the US also.
Just a thought… What would happen if they made it mandatory for their trucks to go over a weigh bridge to ensure they’re not exceeding the GVM of that vehicle. Can’t see that happening though, but it might prevent some of the catastrophic mechanical failures such as the one shown. Just saying 🤔👍
Sooooo, no balancing just going to reinstall it? With instead of 2 now 3 weak points and again not balanced? Yeah right, feel sorry for whoever installs thar in their truck 😂😂😂
No they don’t there is no mechanic that will fix a drive shaft like this! It wont hold! Semi mechanics just replace the drive shaft with a new one! These need too be precisely balance or they break again or tear up the transmission
not even watch the whole yet and can see the this “repair” has been done before and broke in the same spot the previous weld look strong.however the base metal of the repaired tube used is to soft that why it twisted.
It will work , most twisted drive shafts happen when forcing the tractor under a trailer that is heavy and too low . Or overloaded truck in a ditch and trying to just drive out . With normal use it will hold . Worked at trucking company 10 years and saw a few .
@@txrick4879 Impossible, working 10 years in Pakistan's trucking company, because until a few years ago, trucks were completely unknown in Pakistan and for all transportings donkey-carts were used. Maybe you're confusing it with a broken leg on a overloaded donkey?
very nice job, only one major mistake, not maintaining the parallelism of the universal joint that will be mounted on the splined shaft of this shaft ! 🙏😩
