– [RCSparks] So time to diagnose what is wrong with my
Terex Finlay rock crusher. Look at this behemoth. All radio controlled, it
does run on these tracks. You guys may have seen me do the unboxing, or if you’ve caught our show YouTube Gold, you’ve seen this in action. Operating on a dual stick controller, so either track can be
controlled by either stick, and of course the switches
control the jaws on this, which actually crush stone. Now, (laughter) if you’ve never seen this before, what this is is a scaled down version of a full size rock crusher. Excavator, or loader, or conveyor belt, or what have you would be loading rocks into the top of this. It’s a vibrating shaking table that would shake it down into this area, where it’s a jaw, and I’ll show you basically
the chomp movements of it. The jaw is kind of in a V shape, and so as the rocks fall in, the jaw keeps crushing away, and it kind of spits
out the rocks as pebbles on the bottom, and it
travels the conveyor, and it comes up the conveyor, and it drops into a large pile. Now, I wanna say that as a model, this thing works amazing, but it can’t crush all rocks. Mostly I like to use
crushed concrete already, and that way it can chew
through it pretty good. River stone, or those really small, smooth, hard rocks, it doesn’t like, and I’m wondering if that’s what’s caught in there right
now, giving me an issue. So I’ve gotta diagnose it,
but first let me show you. Here’s the battery compartment, with the giant ESC right here. You guys can’t quite see
it, but it is in there, with the on/off switch that powers this giant brushless motor that goes to a transmission that helps power that crusher, right? That’s what’s actually running
the motor back and forth. Now you’ll see in a
moment when I turn that on what’s going on. Here on this side, so
you guys can have a look if you’ve never seen it. Look at that. Intimidating as it may be,
it’s really not that bad. We’re looking at a junction box, we’re looking at four ESCs, and we’re looking at a receiver, which is in the bottom right here. These are all brushed ESCs. They’re controlling one track here, one track on the other side, the shaker deck, (mimics shaking) and of course the brushed motor on the end that runs the whole conveyor system. For those that are wondering, I bought this off of a
website that is in Vietnam, all the way to Canada, so I think they ship all over the world. I’ll leave a link in the video
description box down below. Be prepared, this thing
is ridiculously expensive, but it’s very hard to
get anything like this anywhere else in the world. Now I’ll show you how
the shaker deck works. Let me see here, everything’s… First I gotta plug it in. We’ll do it one handed with a lipo. Oh, totally upside down. Like that, there we go. (beeping) Mm hm. Everything’s good to go. (rattling) So here’s the shaker deck. (rattling) And what this does is it
would take all that rock, and shake it all forward, right, towards the jaws that
continually keep crushing. There is an offset in here, so a weight that kind of spins on a shaft, and it kind of makes
the whole thing jiggle. (rattling) Now the issue I’m having is thinking that there is a stone or
something caught in here. Let’s turn it on so you can have a look, and you can all go eh. Eh. That is not good. So either I have a jam up, or I have something
that’s come off the shaft, but I can already see here that I’ve got some loose pieces. This does a lot of work. It crushes a lot of stone, and you know, if you
don’t do your maintenance, it falls apart. You gotta treat every
RC you own with respect, and always make sure
to do your maintenance. So first things first, I might as well dump it
out, get those rocks out, and I’ll see what’s going on, so I can get some access to that area. (grunt) Now sadly for me, I don’t
see anything in there that would be causing this problem. All this would be normal
crushed rock anyway, so that shouldn’t be an issue. And as I continue to watch
it, I figured it out. (grunt) See, this piece actually has
screws all the way around, and they’ve broken, every single screw. That’s what’s happened. It’s gonna be a big job. Now I figured the best place to start, will be just to take off the cover, and have a look at what’s underneath. Then it just slides out. Ah. So this is a spinning wheel of some sort. (motor whirring) Just gonna go ahead and turn it around. (motor running) A ha, a chain drive, interesting. Wow, look at this guys. That is a sprocket and
chain driven crusher. That makes so much more sense now. (motor whirring) Okay, now I’m gonna remove
the four screws on this side, and on the other side, and see if I can begin to understand how this is fitted in place. I think this middle section may be able to lift right out. A ha, I just discovered
something on this side. I spun this wheel around, and there is a large set screw in there, and I bet you it goes all
the way down to the shaft, and I’m able to slide this out, because that would be idea for me to see those broken
screws right behind it. This is the grub screw I removed. I’m wondering if there’s
another one on the other side. Now I’m wishing I had very
small hex drivers there. I’m not able to fit them in, so I have to take off this whole shroud. Took off the pulley system, right here. Or the chain drive, I should
say, straight off of this. Now I’m gonna try and
take this shroud off, with the motor still attached. See if I can do that. I have a feeling I’m going
about it the long way, but since I’ve never done this before, I really have no idea. A ha. Brilliant. Okay, we turn, not
twisting the wire too badly out of the way. Beautiful. This plate is gonna be wired, and have the belt on the end. It’s just up and out of the way though. Oh yeah. Yes. Just the jaw crusher,
that’s what I needed. Yes. Well, here it is. The nasty part. At least I was able to
get the crusher out. You don’t wanna be getting
your fingers in there while it’s running,
because it’ll just chomp, chomp, chomp, all the way down, so it does have a guard on here. Clearly it’s not hooked up
to any electronics right now, so I don’t have to
worry about getting hit, but look at the adjustment wheel on there, like a worm gear. Amazing. I wanna turn this thing over. There’s the adjustment
for the jaw right there. So as you can see, (laughter) this would wheel, like on a… It just kind of chomp, chomp, chomp, and it all gets spit
out down through here. Now we’ve chomped a lot of gravel, and look at this, I don’t really see a lot of wear on the actual teeth. Like they’re looking
pretty good at the end. Maybe a little bit
right in this area here, but that’s just chipped paint. (hammering) There we go. And there they are. And that is exactly what the problem was. All these shook loose. They didn’t have any Loctite in them, and, a ha, yes. Okay, so as I’m reassembling this, I’m noticing that there
was no top screw ever. It looks like it had had
an indentation of a screw, but there’s nothing behind
it to hold on either side. It’s just a hole, so, no top screw. Okay, so, installed on this side, you can see the red
Loctite kind of seeping from the holes on the
side, not a big deal. There’s not a lot of thread
to actual bite in there. It’s only about 1/4 of the screw, so I wanted to use the red Loctite, just so it didn’t shake free, plus behind this flywheel right here, it’s all done just like this side, but I took some Shoe Goo, if you guys don’t know what that is, it’s like goop or whatever
you wanna call it, and I actually put a thin layer around the outside of the screw heads. Now that’ll help them from
actually vibrating out, so give it a little bit of extra. Now this is an, obviously off-center, so it’s gonna wobble a little bit, but as I turn this, you
can see those jaw teeth moving back and forth. All right, and a short time later, I basically have everything
back together again. I went in and installed
more grease on this chain. I noticed it was starting
to get a little dry. I don’t want the chain to get heated up, because if it heats up, it stretches, and you don’t want a saggy chain. (laughter) No one likes a saggy chain, right? Let’s fire it up. (motor whirring) That’s on low speed. How’s the other side look? Perfect, high speed. Oh, that was high speed. Ah, that’s working nice and quiet. What is this? It’s like working better
than it has in a long time. All right, let’s get the shaker on. And the conveyor on. Let’s throw some rocks in there. (motors running and vibrating) You can hear it chomping it. (motors running) Look at that. Beautiful. Looks good. Stable. (motors running) Let’s just turn it around here. (motors running) Beautiful. Right into the dustpan. (laughter) There we go. Okay, so I’m gonna cover it up, make sure everything is safe enough that fingers aren’t gonna get
caught in there of course, put these two back on. Thank you so much for joining me today. I’m wondering how many people are even at this point in the video. Did you get this far in the video? Leave a comment down below. What do you think of this rock crusher? Is it one of the more unique
RCs you’ve ever seen before? Thanks a lot for tuning in guys, we’ll see you in the next
episode of RC Adventures. Now get outside and have fun with RC. You know I always do, bye. Man, what a killer machine.

Bernard Jenkins


  1. Yep was wrenching on my actros while watching.vids like this showing basic maintanence and the insides if these machines are great

  2. I always wanted RC construction equipment but I went with a different scale, 1/87!

  3. Yes I stuck around to the end. I just want to say THANK YOU for sharing that. Perhaps most will not find this particular video interesting, but from those of us who do, it was really cool. Definitely a pleasure to watch and learn. I have never even considered building an RC all on my own, nor getting into one. This seems very much like trouble shooting any other piece of equipment I would perhaps work with.

    I guess it made it feel less intimidating. Cheers.

  4. All the way to the end yet again my friend. Cool video nice to see how it works and even better to see it at 100 % again.

  5. Hey if the screws come loose again, id use blue loctite. maybe harder bolts too is shears again, Sweet Crusher!!!

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