Repair BIG Final Drive Hub for CAT D10 Dozer | Machining & Drilling

how you going guys Kurtis from cutting edge  engineering today's job i have a d10 final drive   hub that needs a repair done to it the hubs off  a d10t dozer on a dozer you've got two final   drives one on the left one on the right these  drive a sprocket which then drive your tracks   over your idlers and your undercarriage makes a  machine walk backwards and forwards inside the   final drives there's a big planetary set sometimes  there's multiple planetary sets inside and a drive   axle that goes out into your transmission this is  the outside final drive of the machine you also   have a transmission mounted in the machine and it  is also part of the drive unit we just have to do   a repair on the duo cone surface being that they  are in a lot of really rough terrain the duo cones   tend to wear out and then they replace the duos  and they still leak and it all comes down to the   inner face in here gets a bit of wear on it and  it doesn't retain the the seal very well anymore that is a duo cone very baby one this here is  off a little bobcat a customer brought in it   was an idler wheel we were going to have a go at  repairing it worked out it wasn't worth repairing   but i still had the seals laying around so i  thought i'd bring them out and show everyone   what they actually look like that there is  the face that will be pushing up and it will   be pushing against its partner and it's the same  as the one below it so the actual sealing surface   are the faces of the duo cones they use the rubber  o-rings to pre-load the surface of the duo cone   if they're not installed correctly they leak  if you damage them in any way shape or form   say to the face you put a scratch in it they  leak if there's any damage any debris caught   in between them during assembly you'll damage  the seal and they leak so they are very delicate   while they are out of the machine once they're  assembled in the machine these would have to   be one of the best seals you could use to keep  dirt and debris out of a final drive or something   you're trying to see a lot so very very expensive  and very very delicate for this one it's about   this big and x amount of thousand dollars the duo  cone or labyrinth seal they're known as a few different   things depends where you are in the world the  way they are actually retained inside this ring   is there's a little shoulder here it holds  the o-ring below that surface so it can't   pop out during assembly so it also helps  in the sealing process of the final drive   what we need to do we need to set it up in  the lathe we're actually going to machine   bout down to about there of material off the final  drive after we do all the machining the new final   drive ring this is a genuine part from the oem  will be bolted to take the place of the worn   out duo cone surface most of this job is going to  be set up in the machine it's going to take quite   a while to get this set up after that we've got  some profiling to do on the front and then once   we've got all that right we'll pull it out of the  machine i'll take it over the radial arm drill and   we'll drill in our eight holes and tap them it's a  quite a common modification for machines that work   in say a rubbish tip because the biggest killer of  a duo cone is wire so wire will wrap itself around   the drum work its way into the duo cone there's  enough room for it to make its way in in there   and then it just starts to rip everything apart  you spew all your oil out and then you cook a   final drive to replace one of these just the  hub alone is many many many thousands of dollars   this repair we'll be doing it'll  take a probably about a day   i didn't supply the ring so i don't know what  it's worth but well and properly worthwhile   doing a repair or a modification if your  machines have got worn out duo cone seal areas   so very very common and very very  cheap in comparison to buying a new one righto guys so we're setting up the machine to  take this big hub we've got our 950 mil face plate   mounted on the machine i don't have a four jaw big  enough to hang onto something that size i had to   remove the gap out of the machine so i can fit  it in because there's a big big flange that goes   around there that's just a little bit too big for  this i will then be holding everything in place   with the tail stock so we'll put our big  Daintree center in i've got a big face   plate i've already made that fits inside the  spindle into the original bearing cavity it   has a center spot in that so it will hold it  in place with that i will then fix the hub to   the face plate but i will support the weight  using the tail stock i don't need to measure   anything inside the plate is the exact right  thickness that we need so i don't need to   measure past it bit of planning before you  do jobs can save you a lot of time in future 320 kilo that's firm that one's close should be right righto guys so i've got the hub set up in the machine  now the tail stock is doing 90 percent of the   work by holding the the hub up against the face  plate we do have some threaded rod we've used to   fix the hub onto the faceplate being that the job  is it's not overly heavy uh you could probably   take the tail stock away from it and actually  run it off the face plate but i don't want to   risk damaging the machine that center's good for  six ton hanging off the tip of it i've done about   three and a half ton hanging off it before if you  go back and check out our ex 2500 re-barrel video   that centre in this machine was holding a complete  barrel no other support just the live center so   if you've got the gear to utilise to make  jobs safer for the machines and yourself   probably a good idea to do so now that we've  got all that set up we can start our machining [music] beautiful right this is our finished height righto guys so we've completed 90% of the machining  on the hub i was trying to fit the new duo cone   ring onto the surface we've just machined um i'm  on size exactly but the ring wouldn't fit this   ring came off a final drive that had other damage  to it so this is one of their spare ones they   the only spindle they had already had this upgrade  done to it that's why we're converting this one   to suit this to suit the spindle they already  have someone's damaged it trying to get it off   there's a few dents in the surface that goes up  onto this shoulder here so i'm just going to   go through with the die grinder and knock those  surfaces down and see if we can make it fit   and i didn't actually check this one to see if it  was out of round so if it doesn't fit we followed   the manual we followed the upgrade the ring  can only be the thing if there is a problem yup that fits good see one's neutral one's raked that's it [music] take a little bit of [ __ ] heat and that'll drop on righto guys so we've completed all the  machining on the hub now we've got it out   of the lathe we've got it set up in our radial  arm drill i've just put a bit of heat inside   the ring to get it to slip down over that  shoulder that i machined being that that   ring is slightly egg shaped that's on there now  we're going to use a transfer punch to transfer   the holes down to where we need to drill them  into and tap the holes transfer punch it's just a   old drill bit that matches up perfectly  with the pre-drilled hole in the ring   so rather than sit there and measure them  all out this is 100% suitable for the job righto guys so we've marked out all the holes we're  using a 5.16 ml drill or a 13 64 in bananas that's   going to be our drill size for our tapped hole  then we're going to go in with a quarter inch unc   taper tap to get them started and then  we use a bottoming tap to finish them off   i'm going to tap these by hand i'm not going to  risk power tapping and breaking one of these taps   inside this housing if it wasn't a housing  worth the money it is i'd probably do it   but being that these are only hand taps they're  not a machine tap i'm not going to risk that   so we're just going to crack on  drill some holes and get them tapped [music] righto guys so another repair we need to do to  this hub before it goes back to the customer   on the d10 dozers there are five segments make  up the complete sprocket there are six bolts   in each segment two of the bolts one on either  end of the segment have gotten loose or broken   and that's elongated the holes i'd say they  were loose because how much they're actually   torn apart so we're going to have to repair them  too because if we leave them the way they are it's   going to break the bolts again once  they really start working the machine   and then the segments will do a lot more damage  to the final drive hub what we need to do to that   we need to bore them out we need to machine up  some sleeves we're going to press those sleeves   into the holes with enough interference fit  that they're not going to move around at all   that is actually the procedure supplied by the  manufacturer what i need to do first i need to   machine up a bit of a guide so i can put it down  inside the worn bolt holes because they're only   worn on the top edge so i'll machine up  a 27 mil slug that'll go down inside that   and then i can align that to the spindle of  the machine then we'll use an annular cutter   and we're going to bore that out and then we'll  get onto machining the new sleeves to go inside simple basic come on just has to be a dog toy ooohh cool nom nom nom to my bed what you got oh squeaks he's happy because he starts walking around drop it drop it good boy just cast that's the way it is righto guys so we're going to start machining our  sleeves now to repair the holes in the flange of   the of the big hub we're going to be using 4140  it's requested we use a high tensile material this   is the closest thing to what the oem has actually  specified need to machine the sleeves down to   33.75 mil and that's going to give it a 0.1 crush  inside the hole we've just drilled when we go   to fit the sleeves we do have to put them in the  freezer or liquid nitrogen to try and reduce their   diameter just just fractionally it is sort of said  in the paperwork to press these in being that it   would be very difficult to try and fit that hub  inside our press it's not something i'm going to   try and do we're just going to use a pulling bolt  that we've used for many other bushes and we're   going to use a rattle gun and just draw the sleeve  up into the hub i am going to lock tight them as   well so any help you can give it to stop it from  moving or coming loose is a really good measure   to take we're going to get set up in the machine  we're going to start making two of these sleeves 2 point 47 righto guys so i'm not going to do the  assembly the customer has their own   disassembly and reassembly facility over there  i'm going to show you what it's going to look like   once it's finished i'm not going to bolt anything  down i'm just going to show there's an o-ring that   goes around the rim that i machined like that  and that o-ring will sit inside this groove here   so once it's on the machine it's going to  look something like that but it will be   pulled all the way to the base to squash  that o-ring create the seal job done [music] righto hang on make it look huge [giggles] so the we're going to get into all everything that  hah yes this hub is off a d10t bulldozer bulldozer uh it's a [ __ ] the hubs off a d10t [ __ ] sometimes save you a lot of [ __ ] around later on   righto guys so we've got this spindle  uh put the steady up ah [ __ ] oh uh oh oh [ __ ] me so bit of a weird thing there but anyway all right let me start that again righto guys so   we've got the hub set up in the machine now  the center is the [ __ ] righto guys so what i need   to do first i need to machine up a sl a oh well now what i need to do first i need to machine up an   alignment pin so i can use the radial arm drill  to align [ __ ] i'll just pretty much start that again ooohh pee pee how did they get there righto guys so carl's been in he's drawn arrows around the damaged bits   so thank you carl i would never have found them got to be [ __ ] kidding me why what are you doing come on you [ __ ] i could spin that right now with just that against it go on then nah kidding don't do it challenge accepted [laughter] oh no the fact that my heads so close to that [ __ ] can't see a [ __ ] thing yeah the milwaukee torch yeah buddy oh wow didn't want it anyway mmm [ __ ] [squeak] what i hit my [ __ ] funny bone [laughter] was it funny not [ __ ] funny hot as [ __ ] buggery were you going to measure it is that tsk tsk tsk here we go hardest part of the job [giggle] hello hello where is he where is he Homeless where is he go find him come on homeless oh

Channel: Cutting Edge Engineering Australia

Views: 3,262,812

Keywords: cutting edge engineering australia, machinist in australia, machininst, abom79, cee australia, Repair BIG Final Drive Hub for CAT D10 Dozer, Final drive, final drive rebuild, final drive repair, final drive hub, dozer final drive, d10t, caterpillar wrenching, d10 dozer, bulldozer undercarriage, large lathe work, heavy duty machining, radial arm drill, drilling and tapping, machining, heavy turning, machine shop, machining asmr, workshop asmr, labyrinth seal, duo cone seal, cee

Id: pmDeiqD5k2U

Length: 55min 8sec (3308 seconds)

Published: Fri Oct 08 2021