“PROIECT: JOHNSON” aka “The Big One” – LESU CAT 374FL Kit Build PT 4 – TWSS SPECIAL | RC AVENTURI
Acum, where did we last leave off? Was it the undercarriage? nu, that was the second part of the build series that looks pretty completed and solid it's very heavy. Was it the top carousel? da, indeed, we had just finished on the last episode, but Keener's may notice something right away. Look at the back hatch! Thank you for the for the folks that were watching and leaving comments in the comment section I do read them. I did see that these hinges were backwards plus I took this red hatch and I did paint it black now I figured it was much better. It looks nicer plus it gives me the full range of motion on that back hatch and I know you're peeking inside already, and some people will be like why didn't you show me but don't worry. All I did was place, the esc s or the electronic speed controls on their shelf. There are four speed controllers for this excavator and let me break them down for you, the one that you're looking at that has the motor connectors on the end already comes like that in the box in this kit. Aceasta este o 120 amp ESC from Hobby wing. It'S brushless, this is going to be running the the hydraulic pump motor that's, the one that we saw in the last episode that's just underneath this cover here right to the left of it is the carousel the slew ring motor. I should say so.
This is a brushed ESC, that's going to be hooked into a power block and there are two ESC s on the bottom: they're actually identical each one of these down here are brushed ESC. So there are a total of four brush or three brushed ESC s and one brushless for the folks that are wondering, Desigur, desigur, don't worry. I will be going into the details of the electronics when I get there. So let me just put this cover back on. Can I do this one handed haha, so there is that will have to be placed back, but look. I know some of you spotted this already. This is one of the walkways that had to be painted and installed. Now the walkways are fairly straightforward. You'Ll see there's. Two brackets down below you can paint either side or both sides or whatever you wish they're gon na be underneath these plates and you'll notice. Right by my thumbnail there. There is a round hole and down here, another one and then right here, another one and at the top another one. There are two brackets that are going to be screwed under this whole walkway and I'm, going to be using very, Foarte, very small one point to size, nuts and one point to size, bolts and then to mount this up to the excavator itself in the frame they've Got pre tapped holes for the larger two point four screws to go in and you see they right there.
This is so small. I couldn't believe it when I was doing the other one. I actually ended up putting the screw right into my fingertip and because I'm getting old and there's much callus there. I had the piece attached to me. I couldn't even feel it. I had to unscrew it from my finger I'm sure there's, a few you out there that have similar stories to that anyway. I'M gon na put the brackets on this and get this mounted up right here and for those building along with me. This is a few moments later just so you can have a look at how those brackets are actually set up, nu prea rău. It looks like they're fairly flimsy, but I got to tell you when they're actually put on there it's very, very sturdy one and once it's on everything should line up looking good and, as I spin it around and reveal the other side to you same deal connects The same way, except these pieces have three brackets each and now you're, starting to see how my color scheme is coming together, it's interesting how this is reflecting in the light, a different color than this, because they're both the same paint painted at the same time with The same layers, alrighty masterful instruction book: what are we doing next, the main boom, all right that looks good. That is huge. în regulă, so let's see here one of the things that they're showing in the instruction book that is already done.
Thankfully, are these brackets? You can see all these brackets say that they have to be installed, but they actually come pre installed and, if you're very careful, you can actually paint it without having to remove them. Acum. What I did was I covered the tips and all the way down. I took off all the zip ties. These are ones I put on afterwards, but I covered all of the the hydraulic nipples here with tape. You guys got ta expect innuendo in the show that's that's, just the way it's gon na go there's just no way. You can hold on to a big Johnson like this, and now I have a lot of innuendo, and so what I'm gon na do here is, since all these are here, what they're showing is for you to take and put this Ram and on to the arm. You actually have to remove everything to slide that pin in but don't be dismayed, see if you are doing one of these and you've painted it like me, because I have built a smaller version of these. I know that you can move these out of the way. Now these are brass lines and I didn't paint these on the smaller version, the Cobell code that I did, which is actually a Komatsu, but regardless I'm still going to show you because you can slide pin in through that Ram just by moving these. But you have to make sure – and they show you right in the book here – to go back in and put those zip ties.
They actually made these circles here at these points when you're done, because you don't want any of the hydraulic lines being bent or kinked, or anything like that so that's, something to look out for all of this is already done. This is all pre done when it came here now here are the beautiful pieces that are left to assemble all laid out nice and orderly. If you do this in a methodical fashion, not only will you have a great looking machine, but you'll also be able to make your lives a whole lot easier, just by simply laying out everything in the order. So I start with, though the ones the twos the threes and then I go into like washers and nuts and all those kind of things it's easy to find and then down to the pins and the hosing right. So that way you can see now I've already painted these. I taped him off and painted them. The accent color here is the slough motor a couple more braces and then the teeth I painted up for the bucket, which is absolutely massive, so we're gon na keep on going we're going to be using the largest of the Rams right here. What'S surprising is that the diameter isn't any larger than the other Komatsu version that they have it's just a little bit longer. Here is a comparison. You can see the two side by side – da, i'm literally, comparing lengths for you.
According to the all, knowing book a I'm gon na need the pin and then the the other side clamp and then I'm gon na need an M two three bolts, yeah I'll grab the pins that I need. There is two bags of these, so I'm gon na have to make sure that's the right size might as well take both of them out I'm sure I'll need them, and if I just seat this right there, I can probably get that pin in. On the other side, see here for just move these out of the way: I'm, just gon na undo the little holder that's right there once the pin is in place and just get your bolt driver and drive a bolt in to hold that pin in location. So here it is with the zip ties done the way they're requesting the only thing I found surprising and I'm probably gon na slide a washer in here on either side or a shim is that it does have a little bit of side to side play. But I don't see anywhere in the instructions where it says to put a shim in there, but I have a feeling it's supposed to. There are some extra washers around here, but I don't see anything that's going to go around that pin all right now that it is attached. It is time to introduce the hydraulic tubing. This is going to carry the oil from the lines to the actual RAM itself.
There is an in and an out or a left and a right if you prefer open and closed valves, and what I have to do is attach from here to here and to here to here – and this is you know – hydraulic oil tube. This has to maintain a lot of pressure, so it's very firm. You may find it's difficult to get on to the end of the nipple, but if you heat it up, you can suck it right on so a flame or a small heat gun. Hot wax is not recommended kind of gets in there and bunches up. You don't want anything, plugging up the holes. You can see there. It just goes around nice and easy it's, a perfect of fitment. Now what I need to do is take a collar and actually thread it on to the end of the nipple right here. Where you can see there is a thread there's the bag of collars, just slide it right over the tip and go down the length of the shaft and then spin you're all going to laugh at this because you're going to think I'm doing this. Just for the camera, but that's not so this is so firm. What you need to do is kind of warm it up a little bit, but you don't want to burn it. Deci, just you know using the friction from your hands, then that way it makes it more pliable when it's pliable, then heat up the tip, and that way you can suck right back onto this nipple, Bine.
Ei bine, I made a promise to myself this year that if anything ever did go wrong in a build that I would show it on camera because you know it's part of the Hobby experience, especially you know for everybody that's out there and if you, you know saved A lot of money and tried to get a big project on the go. You know you want to know of potential issues now here's I've never had this happen before so here is an inlet for this Ram right here you can see it. I'Ve had some work going on already. This inlet was actually braised and pushed right in here, but it was on quite a downward angle, which is really interesting, because this is supposed to be able to move up and down, and you can see that there is no movement up and down there. Because of that rigid hose now, when you go to move it, it actually moves that joint right or it moves and it broke that braise and which case left me high and dry because I'm, not a brazier, and I know that getting this to attach to that Isn'T going to be easy, so I'm gon na have to learn how to braise right away, but for today's build. What could I do to bypass this issue so heads up on this, because I checked in here as much as I could, and it even shows it's down on an angle. This is the coupling right here.
It shows that it's down on an angle which is very interesting, because this this this whole Ram, is supposed to be able to move. So I know other people have obviously done this before they've built this machine before if anybody's watching this built it. Let me know what you did to bypass this, or did you have to move this at all because it was an issue. Am I using the right one? I believe I am because it's identical to what I had in the picture right here, here's that down piece on that slope, so I don't know how the heck they expected us to work around, that everything looks right. Huh. All I have to do is reattach that, but I can't do it right now: Bine: son of a bitch cuz that's, a big pain in my ass, and for that much money I would expect something a little bit stronger, but I think what really happened is the The braze or the weld itself really wasn't that strong, so it just kind of started, rounding out and that's not a big deal, because I can call su or pardon me I can. I can email less, you call them like in China. I can email them and I know that they've had pretty good customer service for me before so I'm. Sure that they'll be able to get me one of these out here, but for us that totally sucks. But what can I say that's just the way of the road? Sometimes sometimes it works, and sometimes it does not, and if you go into the hobby with that in mind, you will always have a good time, one way or another now I'm, not a big puppy and I don't lay down one of me in a battle.
de fapt, I'm a warrior and I continue to battle on. So what is the next step? Are we able to do this? Can we do this together? Let'S see so this one here is the next part of the boom right here we'll. Let that jb weld sit on there. I know it is not going to work, but that has been able to allow me to move it up a little bit out of the way and I'm gon na. Let that set – and you know it may work we'll see by tomorrow, but regardless we'll get a new RAM in here one way or another moving on. So this one is going to need another Ram. This one will be a little bit more straightforward and simple. It is the small one which is right here, still beautiful, and you know what I've seen lots of our C's from lots of brands have lots of issues and obviously it's may have been something that I have done. You know I don't want to blame it on the manufacturer when a lot of the problems are ID 10t problems or idiot problems. If you want to be more clear about that now, what do we see on this side, so we're gon na be going down. We'Re gon na need the pin on the side beautiful, look at that line straight up with the other ones. Oh, I should have painted those ones brass or that gold color on the end, Bine, that's, Bine, no big deal and just slide that pin into place easier to do with two hands and then put in the the placement screw that's going to keep it locked in With that bolt in it looks nice and flush, and you know what there's less of a gap up here.
So this one need a shim at all that looks very nice, okay and then, after it is mounted up, BOM the massive bucket and the teeth get to go together. Bine! Ei bine, thankfully, between the start of this video and this point in the video, it has actually been about eight hours for me and I've already painted these two things and I've been building as I go. Bine, so after the ram is in place boom there, este. The massive bucket looks like we're, going to be putting all those teeth in place, as well as the side cutters so I'm going to need a lot of screws here and we're gon na need these teeth, while these teeth and that bucket there we go. These are beautiful. Look at that they're the size of my thumb, that's. How long one of these bucket teeth are. You can see they're both shaped different or they're shaped differently on both sides, so you can identify them easily. I think the only way I can give anybody some actual scale here grab one of the cold ones from the fridge. Look at this that's a full size, full sized can of beer right there. If that gives you any kind of idea, how big this bucket is full can normal size, I didn't say it was good beer. I just said it was a can of beer, so the teeth will line up with this rounded. Știi, știi, nu-mi place, like horseshoe, shape, going up and they're just gon na slide on, like so slides on, so it looks like crazy Jill right there boom crazy, Joe well.
Sigur că da., that would be if he was missing all of his other teeth here we go. This is what he's gon na look like when he's like 70 dreptul de. So what I'll have is a grille when I'm 70, so I need em to ten so because I laid them out easy to see. Em 10 is right. There washer and special nut okay. So the special nuts are right here. What makes them so special you'll actually see that they're quite elongated and then we're gon na need the washers okay let's see if it can hold a king can so it is exactly the width of a king. Can how many could I get in there? A few of them, you could bring like three of them over to the site, easily yeah, and then I take the screws and I lay them through the bottom. Everyone will be like drink the drink, the beer drink, the beer and you guys do actually this whole time I don't drink people will be like well now, you've you've got a drinking problem. Why don't you drink, and actually I take medication that doesn't allow me to drink, and I would say that is my biggest problem and then these four beautiful side cutters these are painted, even though they are brass and these teeth slide on opposite of each other and Just line up with the two holes that are there, then you're going to be using the longer 2.
8 or or the M twos and to slide them through each one, with a nut on either side. Now that is what I'm talking about that looks fantastic. You just don't get the size of it until you're here in person. ok, that is looking very tasty, indeed, foarte puternic, very large lots of power. So next up we've got the ring okay, so this is going to go on top of the slew ring itself. This is actually going to be the motor holder, so we're gon na put that on before the motor goes on. Gosh, da, Bine, Bine, that's, no problem that's this piece right here and this is going to be going with the track wires. The track motor wires straight through the center, so somebody asked me how heavy is this going to be once it is 100 completed with the hydraulic oil in there, as well as the battery and I'm gon na estimate close to 75 pounds there? We go just lining up that round plate with the screw holes and the motor plate here's what I was seen looking down trying to line that stuff up. Sigur că da., I have it all lined up now, so this is where the motor is gon na go against the teeth there. Where is that motor? You can see it right here with the pinion on the end tada that is gon na fit in there but I'm. Not gon na do that right this second, I still have to get all these bolts all the way around done up.
Bine. So now all the bolts are done up, and I have these two leads from either track motor on each ESC on the bottom. If you remember, I mentioned they're here on the bottom, they have those motor leads already pre soldered up for air soldered or whatever you want to pronounce it as wherever you're at so all you need to do is to take each set of track motors and plug Them the male end into the female end to join them up. Do that with each track motor on each bottom ESC. I caught myself in my own video, making a huge mistake at the beginning. This is actually three brushless esc s, they're brushless motors in in the front track motors, though the way I can tell that is by the three wires that are here so brushless motors in the tracks. My mistake so that one another question somebody will have is how do you know which wire goes into which plug and you know because there are different colors you'll notice. One is red and yellow, and the other is orange and yellow this one. Probably here. What is this black yeah black goes to the blue. If you find your track, motor is actually going in the wrong door. Just change any two of these around and it'll switch the direction of the motor that's, the beauty about brushless motors that are sensorless just like that there's. A perfect example of what I mean you can see these next ones on the other ESC were orange, green and brown.
When really you could just kind of hook it up the way you want see which direction the track goes and then switch it around. So I have not plugged in a receiver, yet I have not hooked up the power to these es es I've only plugged in these two leads to the track motors. Now I can take this transmission and motor and put it in place making sure to slide the leads to the brushed motor ah in brush motor. You can tell because there's only two leads, which is a positive and negative I'm gon na go under this Center bracket and mount it up with the screws provided m26 now. Are they gon na be bolts or are they gon na be screws I'm gon na go with the thinking, they're gon na be screw heads and they are winner, okay and then the this piece that I painted slides in right there and gets two bolts one here And one there looks so awesome, so then this is what we are left with, so we are moving on now we're gon na start putting in the main boom. There is the hinge point right here straight through to this side, which pin is it going to be? It says, it's going to be l, '. L ' is going to be 86 mils long, L, ', hello and greasy shaft might be hard to hold on to, but extra Lube is going to be worth it if things get wet so make sure you've got the direction proper.
So when you stick it through the hole, the proper tip is sticking out on the other side, when you slide it in, if there's anything sticky leftover just make sure to give it a good wipe. You know you have the right Ram, because you can see the large diameter hole on the other side, it's gon na fit in there so nicely and from previous experience I know which way to put the in because you want to keep the pipes to the inside. So when it actually goes down and flexes a little bit, it's not actually running and interrupting anything, so the boom is sticking straight up in the air quite erect. I would say this was making it easy for me to get in and to stick the pin through the slot allowing this Ram to be us well secured in place, but I also noticed this has a little bit of slop on either side too it's almost like It could use some plastic shims on either side that would help it help it move easy, but maybe maybe it's not such a big deal, maybe I'm just thinking it is, but it's not so let's go here. This is the second one. The second one would slide in just like this perfect at the same time, well almost to insert that a locking screw it's best just to lift one of the Rams up. That way, you have clear access to the hole I'm gon na use a longer driver here and then just kind of gently work.
Your way in you don't want to be forcing anything you'll notice I haven't used a drill. Everything is hand turned for a reason: they're not over tight, just tight enough and then on the other side, very awkward. Positioning I'm. Very lucky I've got a small bit right here, tada that I can actually remove from this. But I got this a long time ago on some RC four wheel drive bead locks. I think it was that way. I can use an allen key it's kind of like a very, very small socket. I wish I could tell you where to get one KL 37. The fattest pin on the block, and then there was a small plate I put on here kind of like a cap that gets three bolts, and this is basically what attaches the end of that bolt to these two Rams, one on either side, Desigur, desigur, and then No and then okay, then the next page says I'm going to need L, 41 and L 42, and these are gon na have these brackets and this piece on here for the shovel yeah. But it wants me to do a whole bunch of hoes. Primul, Hmm, do I do the shovel or do I do the hose, ah bring it take this pin? Bine, so here you can see, I've run the pin all the way through to the other side of the arm. Now what I need to do is take a small piece and pin the pin in place now this piece will come into play.
A lot of people may have been wondering what this was for, but this is actually to help the action of the bucket. După puteți vedea, it fits into the end of the RAM with these two long arms with the pins that go through on either sides. Two straight pins: these pins are right here. Bine, so how it attaches is pretty straightforward. The pin comes in through this side goes through this little swing. Arm that I painted earlier make sure the direction is right goes straight through the center of that last ram through to the other side, and then again with one of these pin stops right here. It locks it in place, then what you want to do is you want to take it to the other side and do the same thing run the other pin straight through and then lock it with another one of these screws on this okay, once that's locked in Place then you take the bucket with the two pins that are left and you slide it through the two holes that are left here's. The two pins, alright, Bine, I'm gon na leave it there. My friends, I have a ton of work to go still, but look at this. The main boom is on the arm is now on. Look at this and it doesn't know justice at all that's. Why I put the beer cans in here like no justice whatsoever. Look at this all the way around, so I still have electronics to do.
You guys make some noise in the comments section. If you want me to show you the electronics on camera or if you want me just to string all the electronics myself, I can do that and then just kind of catch you guys up to speed. I want to know, let me know your opinion in the comment section down below. Are you advanced enough that you already know the electronics and don't really care? Știi, știi, nu-mi place, because I can go ahead and do this on my own. I am gon na. Do all the hoses on my own, I normally know it's a team effort, but at the same time I feel more accomplished when I can get multiple hoses done in a day, and I hope you guys have had a good time watching. Today'S video, I don't, have all the pieces on yet I still got to put the top plate on the back piece. The back weight has to go on and yes, Desigur, desigur, look at this, i hand painted it. I know some of you guys are noticing it already, but this is the back wait and the cat plate that is painted red and gold to match with the rest of it guys. Hopefully I earned a light click from you today. This was a hell of a lot more work than I'd, like to admit normally, people take like a year to build these things, and I am enjoying it as quickly as possible.
Look at this all the accent pieces on it are really starting to come together. I'M.