Restoring BIG Excavator Arm & Bucket! | PART 1 | Facing with WS2 Plus Line borer

How are you guys Kurtis from Cutting Edge Engineering? Today's work. We have a rocker arm and

bucket

from a ZX 690

excavator

for repair. The ZX690 is a 70 ton

excavator

commonly found in large quarries or mining for mass evacuation of bulk earthworks, so these

part

s are from the same machine, the

bucket

is attached to the bottom of the dipper arm and then the dipper arm connects to the main beam of the excavator, so the bucket with its entire wear package weighs about 5 1/2 tons and the dipper arm weighs about 3 and 1/2 and the repair which they are in because the pressure levels on the bottom of the dipper arm and the inside of the bucket ears are worn out, so the reason they were used is large O-rings on the bottom of the arm. of the rocker arm that is supposed to protect the position of the pin from any debris or material entering it. those o-rings wore out and came loose and then the material that the machine dug up got between those two pressure levels and took it away, so visually it doesn't look too bad, but the pressure levels are missing about 35mm of material, luckily our customer caught it in time and the holes are still in good condition, so if the customer had lasted much longer it would have completely destroyed the bottom of the rocker arm and most likely broken the Barrette.

So what are we going to do today? The thing is that we go to the end of the rocker arm and to the inside of the bucket. Then we'll machine some spacer plates and weld them into position, so the first thing I have to do is remove the bucket pin, take the crane out so the pins and bushings have a lot of wear. I already spoke to the customer and he said he would get them up and running again, so we're just going to put this pin aside and continue installing the

line

drill and we're going to use our new WS2 plus to give it a good first test. , so on the bucket we are going to set up our standard fixings using the centering rod and cones, so now with those fixed in position, I am going to install them on the stick. arm, so to give you enough headroom, we use our shop-made bearing brackets to support the outer legs of the bearing brackets.

I'm going to weld a flat rod onto the rocker arm so that with all the fasteners in position we're going to fit our directional head, so this directional head is quite large. Sir Meccanica offers extension kits to fit the bearing brackets, but I prefer to use the brackets I made, so now that we have the head on the bar we can go ahead and set up the rest of the machine, so one of the limitations of This is that you only have so many holes to insert a tool and only so many holes to bolt the block to the head, so sometimes you miss the bottom of the hole due to clearance issues, all set up, so let's see. how are we going, the way this head works it has a spring loaded lever and is essentially a claw clutch so as it spins it pulls on the lever so it engages the tooth and then it starts coming out of the head , so this is our first time.

Unfortunately, the cut is done, it didn't clear up all the way, and we missed a few thousandths of an inch at the bottom of the hole, so let's fix that. Make another cut and the last mm that I missed, I'll be able to set up a tool and remove it at the end, so I cut the face with a tool just extending it for each track. There is an option here, but it is not precise enough because it also generates a lot of vibration and vibration and just drives. due to broken tooling and because we have the headstock we will definitely use it a bit more so this is our first really machined face.

You can see where someone actually welded that face once before it was a little harder than the rest. of the material, so overall this setup works very well. I had a little vibration issue when I first started cleansing the face, but once I got past that sticky point, everything went great. This side is ready, let's move on to another side. the other side and place it at the same point so that's our second side seen, I'm just going to get the head out of the way so I can put a tool in and clean up the last

part

that I missed, so that's all the cuts made on the Dipper arm are, but before I put the

line

drill into the bucket I decided I'm going to remove those bushings because they stick out a little from that face and I can't use induction hardened bushings with a line. driller, give your pig what you got, come on, hey, where are you going?

What's that, oh, great, leave it, stay, stay, take it, uhoh, come in quickly, continue so those bushes have cooled down enough now we're just going to remove them, so Now that we've removed that, we can set the line punch and to add a little extra support to the bar, I'm going to add an extra probing between the lugs on the right, so we've done that three times already. and I haven't cleaned the bottom yet so it really shows why it was repaired so it took about six cuts on the face to clean it up. Now that's done, let's move on to the other right side so that the face is When I cleaned it, it didn't have as much wear as the opposite side.

I thought the reason the left side was more worn than the right was because the operator sits on the left side of the bucket which is their best line of sight and they often use that corner of the bucket to dig up rocks and try to get out. some of the way so you end up putting more load and more pressure on one side of the bucket, so that's about half the job done, but you. We'll have to stick around for the next video where we weld the new spacers into place and the new bushings fit into the bucket.

Thanks for watching guys, Kurtis from Cutting Edge Engineering. Today's work, we have a rocker arm, so let's get it. OMG MMmmmm so I'm going to ohm me so visually it sets the ohhhh OMG so cut the face with you ohhhh so yeah, this boring head Ohhmm so yeah, this boring head is quite big is it a boring head? Look at the head, so this boring head is quite big. Sir, you just said it again. Ready? Wait, what did I say? Do you want me to take it out this end? He is holding her. Yes, take it out.

Here we go. How far is enough? Oops, what was that lumpy little workshop bump? Oh God, nothing to get you up in a slightly uncomfortable position. You need the ladder to go up. Okay, if you were taller, then you wouldn't be able to get up quickly. You're crazy? jerky, what is this smell? No, the pig is the winner.