John Deere Grader Repairs! | Fitting Blade Skin & Replacing Blade Slide Rail
how you going guys Kurtis from Cutting Edge engineering so today's job we have a 672 Grader in for some repair considering how many hours this grader has on it it is in really good condition and the customer just wants to prolong its life and get the most out of it while he can so what we're going to be doing we're going to be fitting a wear skin to the blade so the material doesn't erode the original blade skin and we also need to replace the bottom guide on the back of the blade that sits in the cradle because this is a GPS machine any sort of tolerance issues in the blade does affect the way it cuts so while we've got the blade off we're going to replace it first thing I'm going to be doing is fitting the wear skin onto the blade but because I'm under such tight time restraints on this machine because it does have another job to go to and it is end of year and we are extremely busy we won't be showing too much detail of fitting the wear skin because we already have videos on our channel so we're going to get stuck into it first thing I need to do is remove the blade from the grader so if I was just fitting the wear skin onto the blade i' just swing the blade out to the side of the machine and fit the wear skin with the blade still attached but because I'm doing the guide I'm going to remove it off the machine righto guys so that's the blade removed from the grader what I'm going to do now is take it inside so I can start fitting the wear skin so now that the blade's inside we can can really see the amount of wear that's on the bottom guide it is supposed to be a square 90° edge and there is about 7 mil of material missing but that is only in the working zone the outer edges are in pretty good shape but it is a good thing we are changing it cuz it'll just give this grater another 8,000 hours of life so the next thing I'm going to do I'm going to bring the new skin inside I'm going to mark out what I need to cut off it we'll get that cut and then we can fit it onto the blade and the piece of material we're going to be using it is 8 mil in a 450 grade wear plate and we've had it pressed by one of our local suppliers so I've got that marked out ready to cut it if you're wondering why there's so much extra material there that is because we do use this skin profile to suit a big variety of graders rather than have 10 different size skins we use one skin and then we get it pressed and we can cut it to suit the grader it's going on but that material is not going to go to waste I do use that for doing patch repairs on grader blades and the longer pieces we use on the bottom of buckets water double whopper and bacon Deluxe yum that's pretty good so we've just had an Uber Eats delivery for lunch so thank you very much Timothy for our Hungry Jack's order [Karen] Kurtis's favourite maybe show em cause is it the same as like it's like Burger King well Hungry Jacks is the Burger King yeah okay give em a look at the Whopper ohhh is that an angry Whopper looks like it yum now we've got our skin cut and prepped we can fit it to the blade so that skin fits really good really happy with that now we can go through and tack everything off and then weld it out to start welding it out I am going to weld the plug holes in first once I've done done that I'm then going to go around the perimeter the wire I'm using is cig verticor in a 1.2 and the gas I'll be running that with is Argo Shield heavy which is 80% argon 20% CO2 I'll be running that at about 26 volts and 6 metres of wire a minute and to ensure the skin is correctly attached to the blade I'm going to be doing two weld passes one hot pass and then a capping pass now with the skin fully welded to the blade I'm going to go down the sides and across the leading edge with a hard facing layer the hard facing rods that I'm using are Abrasocord 700s in a 4 mil diameter and I'm going to be running them at 160 amp because the weld material is much softer than the 450 grade wear plate putting the hard facing layer on the top of the weld will just prevent the weld from being eroded and the skin lifting off the blade which will help prolong the life of the blade now that the blade skin is completed we can get on to replacing the bottom blade guide so what I need to do is take this outside flip it over and gouge off the bottom rail so we just replace the guides we don't bother trying to weld them up and then machine them back to spec because the weld material you put on there is nowhere near as good as the parent material it is quite a high tensile plate and welding it with hard facing wire is just not economical it is quite difficult to machine and it actually works out cheaper just to replace the entire guide righto guys so now we've got the old guide removed and the blade ground up and prepped we're going to get our new guide over and get it prepped as well so our new piece of material it is Biz 80 grade plate and in order for this to work correctly in the saddle on The grader it does need to be square and 90° because it's not square where we do need to machine it so we're going to set it up in our Zayer come on righto guys so we've got our piece of material set up in the Zayer we are going to be using the beds full travel from end to end so I do have to open up a cabinet door to allow the table just to go that little bit further and I've also got to move the little wall that covers in our smaller milling machine so it can actually go past that before I had the Zayer I would have to do these guides in our little Bridgeport style machine and it would require four setups for each side so having the Zayer is already paying off because it means one setup for each side so I'm going to bring the head down and move the table all the way to one end before we start cutting so I'm going to be using a 150 mil diameter 12 insert shell mill I'm going to be running that at 152 RPM and I'll be feeding the table along at 114 mil a minute so you might notice that the tool is throwing off a few red Sparks that is because the material is getting quite hot and the inserts are worn out generally you would run coolant on something like this unfortunately the coolant system on this machine is not working at the moment I'm not too worried about the inserts we're just going to let it run so that that's our first side machined you will notice when I undo the vices the material is going to bend and that is because I have relieved a plasma cut edge when I flip that over I will pull it down onto 1 two three blocks and then machine that surface and it will actually stay dead straight after that so I am just going to take it out of the machine and debur these corners with a grinder so the vice clamp up nice and tight so we've got it set up to do the next side and the cut we're going to take it is is going to clean it up and bring it to size right now that I've got that machined to size I am going to do a weld prep on it I'll be using a 45° approach 50 mil face cutter and we're just going to do about a 5 mil weld prep from one end all the way to the other on both side 318 yup so that's all the machining done now we can take it over fit it onto the blade and weld it out so when fitting a new guide it is super important that you get the guides parallel all the way down so when I am setting the guides up on a grader blade I do use a tape measure to get a rough measurement but I will also use calipers to get them exactly right and then I will go through and I will dog and wedge them into position tack them in place and then double check them after I've tacked them that's pretty cute [Karen] I scared em away I'm sorry so we've got the guide tacked in place now we can weld it out I'm going to be using the same filler material and weld procedure that we used to weld on the skin righto so that is all the welding finished on our blade now we can fit it back to the grader so before we can fit the new blade I do need to change out the bottom brass guide shims they are in pretty good condition but they are worn they're past 90° so we're not going to put our new guide through those we're just going to change them out so you might notice the rock sitting on top of the cylinder up against the saddle that there is the biggest cause for barrel damage to the blade slide cylinders themselves they start to work themselves further down as they slide the cylinder back and forward and finally they get to a point where they can't go anymore and they just dent the barrels and then the pistons pick up in the barrels and then you end up throwing the cylinder in the bin so you can't actually see them when the blade's on you do need to get underneath and have a look and knock them out so you don't end up destroying the barrel so really happy with where the blade is sitting in the saddle it's sitting down nice and square on top of our new guide now I can put on the top clamps wow now that the top clamps are in place I'm going to reattach the blade slide cylinder once I do that I can test the blade sliding in the saddle [Karen] yup pretty good so that's moving really nicely there is no binding and there aren't any excess gaps around the guides so now I can adjust the top clamps why is that so tight the reason I like using that stuff is it dries off and doesn't attract dust so it's good practice when you are adjusting the brass guide blocks you don't want to put too much tension on them so to make sure they're not overadjusted I wind the adjustment bolt down on top of the block I back it off a quarter of a turn and then I tighten down the jam nut once the operator's done a couple of days work he can then readjust them if they need to be to make sure I didn't overtighten them I'm going to test the blade slide again so everything under the grade is done the last thing I need to do is fit the GPS pole righto guys so that's our grader job completed we fit and welded on the new we skin and replace the back guide and got everything back together again so all up a job like this will take a few days everything's pretty straightforward we've done a lot of these for this customer we've also got the material which is the wear skin and we also got to get that pressed into shape off site and we have the material for the back guide overall this is a small cost for our customer to add many more years to the blade now he can get this machine back to work and earn some money thanks for watching but that material doesn't go to wh ugh [Karen] what what what [Karen] what happened I don't know is this just audio [Karen] well probably I don't know yet can you put a bit more effort into this I've struggling you've been sitting [Karen] OI I've been listening to you that is the biggest struggle of them all and then I got to relisten when I edit this right so oh wait so it's good practice [giggle] now that the skin's been oh [ __ ] how did I start it so I'm going to be using a 150 mil diameter 12 ugh so I'm going to be using a 12 ughhhh so I'm going to be using a 150 milla diam [ __ ] me [Karen] pffftt oh Jesus [giggle] [Karen[ think about it do you want to just think the words first I think I thought okay I think I thought about the thing [giggle] as long as you're oh [ __ ] me so as long as your top guide measurements ughhh [ __ ] [Karen] try again as long as ahh for [ __ ] sake right now we've got that tacked in place we can now weld it out ugh said now twice now we've got the skin cut and prepped now we can fit it onto JUST [giggle] did I do it again [Karen] you did it again [Laughter] now with all the machining done oh wait now so is that UGH [Laughter] [ __ ] ready yup [Karen] what the heck ugh oh no that's disappointing [sigh] are you [ __ ] serious you gimme back my [ __ ] socket oh really ohh stop being a [ __ ] [Karen] ohhh it's hot jeez louise [Karen] phew it's hot hey after this we should go to Starbucks [Karen] YES woohoo Kurtis gets the pinkity drinkity [Laughter] [Karen] do you have to hook up the forklift nah I'm just going to undo the top ones I'll just hold it oh I'll undo it then lie it down [Karen] you so strong thank you [Karen] it's behind it [giggle] thank you [ __ ] Hammer [Karen] what that hammer [Karen] oh my God [Laughter] you looked at it righto guys so that's our blade ughhh [ __ ] me right guys so that's our grader job for [ __ ] sake [snort giggle] right guys so that's our great oh for [ __ ]ssss [Karen] what happens stuff [Karen] I'd love to be in your brain I don't know [giggle] there'll be a monkey goin ding ding ding ding[Laughter] [chirp] [chirp chirp]
2023-12-16 08:35
