 Hey there, welcome to the next and perhaps the final episode of Reverse Engineering and Restoring, I guess, the Monroe K series calculator. So when last we left off, I was about to put the cover on the keyboard. So before I do that, I do have to thread the carriage lifter mechanism in. Now one thing that I learned the hard way is that these are kind of, I think they're actually ball bearings. So it would be really bad, I think, to get degreaser in there because it'll just dissolve all the oil that's actually inside, which I think is probably a bad thing. So I wouldn't actually clean this side. So this rotates pretty well, this doesn't rotate very well. What I'm going to do is just attempt to give it some oil. This may or may not work, but I'm just going to stick a tiny bit of oil in there and just sort of, okay, well it's spinning, it's certainly spinning a little freer now. So yeah, that seemed to have worked. So I guess I'll do it on the other side as well. These are probably not sealed systems, so anyway. So that gets threaded down here. You can see where there's a scrape mark. So I'm just going to put some oil in the U over here, and then I'm going to insert it just like that. Now an interesting thing is what exactly do these screws do? Well this screw right over here seems to be some sort of a tightening device. So we'll deal with that later, we'll figure out what that's for later, and there's a spring here that goes from here to here, so this is our, what is it called, item count. There's this lever which appears to have something to do with the bell muting mechanism, so we're going to have to figure out which side of the lever it goes on to, and then there's this thing, which I have no idea what that does. So, ah, but it may have something to do with this, which as you will recall is the clearing mechanism, right, yep, is the clearing mechanism, so I think that's what this is. So let's rotate this in that position, and then just try to put all the keys in their place, and this is probably going to be a really difficult and time-consuming task, because all the keys need to fit in their slots. So what I'm going to do is I'm going to get a long screwdriver so that I can poke at all of these things to get them in their slots, that will probably be the best thing to do. So I think I'm just probably going to fast forward until past the point where I've got all these things in. Okay, so, well the good news is that I was able to put the plate on basically by putting this side on first, and then just basically working my way slowly this way. So that's the good news. The other good news is that if I push down the keys, keys all seem to work, they don't get stuck, which is a good thing, okay? So that's great. So one of the bad things is this. This key right over here is special, because it's got a hole in it, and I didn't realize it, and it actually goes over here so that the item count lever can actually go into that hole. So I'm going to have to swap these two keys, so that's one thing. The other thing is that I still don't know why the zero button isn't doing anything. And I know that there's supposed to be something here, but I don't know what that is. So that's another thing that I'm going to have to look at to figure that out. I'm pretty sure, of course, that it must have something to do with this clearing axle here, so I need to find out what's going on. I think probably this key actually goes above something in here, so that when I push this, so that this normally stays up, so that when I push this down, this thing rotates. So I may need to possibly remove this key maybe and reset it. So that's one thing. I'm not really sure how the repeat and non-repeat functions actually work. I think maybe its only purpose is to, I don't know, prevent this from moving, from clearing out. I don't know what automatically clears out the selection when you rotate the cycle once. So that's that. Let's see what else. What else? I still haven't quite figured out the purpose of, there's this lever, if I can point at it right over here, that's on the underside. I don't know what that's for. I have absolutely no idea. It just seems to sit there and do nothing. So I'm going to have to figure that out. So I think I'm going to stop the video and fix all these problems. So these are lessons learned. And then when we come back, hopefully I should have all those problems resolved and we can continue. So when I took the keyboard off, I noticed something which gives us some important information about why this weird wire was here. So when I put the keyboard on, I did forget to replace this spring. This spring actually goes up here onto that little post over there. So what is that over here? Well, that's this mechanism right here. So here, let me pull on this. So that's this mechanism right here. Now remember that this is also spring loaded to force this down so that if I start turning the thing like this, and I keep turning it, it keeps turning like that. But I think the thing is that this wire was here, I guess to prevent this from hitting this because you can see that we know that this lever over here will prevent the cycle from going if it goes down enough. Okay, and now it got stuck somehow, and I'm probably going to have to figure that out. Why is that happening? It could be the reverse pawl lock mechanism. Anyway, wow, wow, it really got stuck, okay. That's certainly something I'm going to have to solve. There we go. So however, if this lever over here is flipped up, that moves this lever down, which prevents the machine from moving, well, it doesn't exactly, I guess, prevent the machine from moving. I guess you can see, there, now it's preventing the machine from moving completely. So I'm still kind of wondering, okay, so I guess I don't really know what this wire is for. Again, it seems like it's preventing, if I put that wire on, it seems like it's preventing this lever from having any purpose whatsoever. But you know, that lever does have a purpose. It causes, when this lever flips up, it causes the cycle to be locked. I guess I'll call it like that. So this goes up, that engages this little thing over here, and then when you try to move the machine, it locks. So unless you pull this lever up, and then the machine, okay, it's also locked, apparently. That's, oh, okay, and now it isn't locked. That's kind of a complicated mechanism. Let's see. So we turn it once, and it stops. If we flip the lever up, the cycle cannot go, but then the cycle can go again. So that's kind of weird. I don't really know what's going on with that. But I'll leave the wire off and see what happens. So that's the interesting thing that this spring causes to happen. And I believe the mystery may have been solved. Just by chance I was playing around with this bell hammer mechanism, and I noticed that when the bell rings, if I try to flip this lever so that the bell rings, it also flips this lever up, which allows this to continue. So I think what's, what may be going on, I'm not sure, but I think the carriage may have something to do with this. So that when the carriage overflows, maybe that causes this bell to ring, which causes this thing to flip up, which causes this lever to go into its locking position. So basically it's an error detection mechanism so that you don't continue cycling the machine past the error condition, I suppose, which is kind of interesting. I would have wondered why bother? I do know that that is actually an important mechanism when you do division so that you keep subtracting, subtracting, subtracting. Maybe that's what it is, because when you're just in the zone and you're just subtracting in order to do division, when you go past zero and into the negatives, I guess this bell would ring, which would be an indication for you to stop. So you would stop and then you would crank it forward again and then move the carriage over in order to get the next digit in the division. So I think what that means is that you would be subtracting, subtracting, subtracting and then you could just keep going without really paying attention and then the bell would ring and the cycle would stop. So you wouldn't actually be able to continue subtracting. So I think that's what this mechanism is for. Again I don't know why this wire would be here. So I'm going to leave it off because I think that this mechanism probably works the way it should. So that's really interesting and we will have a chance to put that to the test once the machine is fully put together. Now about this section, which is the, this is the zeroing key, right? So my assumption is that there's something that holds this up in the up direction because when I put the keyboard on it was just sort of like this and this didn't do anything. So my assumption is that this is kept up. Now if I look at this side right over here you can sort of see this little bit of a lever over here. There's actually a little post in here so that as I spin the wheel and I hold this up you can see that this remains up and then if I continue to spin the wheel at some point this thing raises up and then it can come back down again like that. So I think that may have something to do with when you're allowed to push the reset button because if I'm halfway through the cycle, say like, okay I just locked it up again, hang on, alright so if I'm maybe halfway through the cycle like this, okay well I guess I don't really know what I'm talking about but I think it's interesting this wheel does actually interact with this lever so you know maybe as I put the keyboard on more carefully and observe what this lever actually does perhaps I'll be able to figure out what that mechanism is supposed to do. So here's this other mechanism that I was talking about, this is the clearing mechanism. So there is a little section on this lever that you can see that interacts with this and what I was saying earlier in the video was that I think this section of this lever goes above this lever over here. So I think that we can probably remove this at the bottom that'll let me take this key out and then I can maneuver this key so that it's in its proper position. So let's go ahead and try that, I'll just remove this piece of wire here or at least attempt to, there's one part and I'll just squeeze these other parts together, okay now I should be able to pull the wire, oh it broke, well that's okay it's just a piece of wire, okay so now I can attempt to remove this, no I can't actually remove it because the keyboard's in the way, okay that's not so good. Well I suppose maybe what I could do is remove this, just unscrew it a bit so that I can actually lift this up a bit, here let me unscrew the other one as well, maybe that'll give me, yeah that gives me some room to maneuver now, there I think that's the way it's supposed to work, okay so now let's screw this back in, screw this back in, okay so now let me push this down, put this washer back on and then just put this wire in and it's not great but I think, oops, I think I should be able to shape this a little bit, well no actually I can't shape this wire, it has to go in and then think, push it enough, can bend it so that it won't come out, maneuver it so that it comes out, it doesn't look like it, it's not great, I think I will have to replace that at some point but not now, alright so that is the purpose of this lever to run the clearing axle, so that works and the other thing that I did notice also as well is this I think is the repeat lever, this is the non-repeat lever, so the only purpose of the non-repeat lever is to reset the repeat lever or key stem, if I push the repeat key stem down you notice that there's this sort of diamond shaped hole and the purpose of that is to actually push this lever up and in pushing this lever up in this direction it actually causes the lever to start to interact with this post that I mentioned and also this piece as well which moves around so that will actually cause, so that will actually cause this lever to I guess, let's see, so I guess at some point this lever will have to be pushed down and when it gets pushed down all the way that causes, that actually makes the zero key pressed down, so if you rotate this enough that'll cause that to happen but only if the repeat key is not set, so I think let's see, it's possible, did I get these backwards? Did I get, no I don't think so, well okay so we'll have to see because I'm pretty sure that if this lever goes up which means that this key stem has to be in the down position that allows this to turn like this, so maybe this is non-repeat and this is repeat, I'm pretty sure that, yeah that's that's the way it must be, so when this key is down, yeah so when this key is down that's non-repeat which means that when you run through a cycle eventually this lever will push the zeroing, the clearing key down, so good, okay I think that's that's pretty much how it's supposed to work, okay so now all I have to do is put that cover back on and hope that everything works the way I think it should. Two more mysteries possibly solved, the purpose of this lever and the purpose of this lever, so remember I was wondering what actually activated this clearing rod over here and this locking rod over here, well it turns out that there's this little notch over here that fits perfectly right over here and in addition, well there's no notch over here but this little thing fits right over here so obviously that has something to do with this so that and it probably interacts with both this and this lever so that when this maybe when this lever goes up that thing moves and it maybe pushes this over so that's that's something that I'll have to look at and as for this you can see that it also moves over this notch and this notch is for the carriage lock so clearly that has something to do with the carriage lock exactly what I'm not quite sure but clearly the carriage lock interacts with the keyboard lock so I figured out this mechanism see it goes like that so basically this tiny little lever over here needs to be in this position which is kind of unfortunate because it can actually rotate around to the point where that is when you put the plate on it can rotate around to the point where it actually doesn't doesn't actually do anything but it needs to be in this position behind this so that and you can see these bales inside move so that they get cleared so let me turn this around to here so that you can see the entire thing it took a long long time for me to get this plate back on and it's not only getting the plate back on but also making sure that making sure that the clear bar here and the lock bar here went into their slots in my opinion this is a really fragile design because these two bars just barely go into these slots I would have made these a lot higher so that I could get the slots aligned properly there is indeed a locking mechanism on this side there is a lever like inside here which if you can see this it moves so that was the purpose of that lever over here let's see what else oh yeah as I was testing it this thing actually moved and sort of got wedged in the gear teeth so I was turning the the wheel and wondering why it wasn't turning did I lock something up no it was just that this was not fixed yet so let's let's just test it out just to make sure the things are working so we've got some keys that we can press and if we press the zero key indeed we can see that they clear so we can also do this and press the the master zero key okay that definitely clears out we can just press a whole bunch of buttons and make sure that that clears things out it does we would basically go through all of these buttons so that's fours five sixes seven eight and nine good the other thing that we want to test is that the repeat non-repeat mechanism works so looking at it from I guess this perspective when this key is down this lever is that what let's see yeah when this when this key is down that lever is that way which means that it's going to clear using that little mechanism that I showed you so if I punch in some numbers and then I go ahead and rotate one cycle hopefully they should clear yep there we go so and if I press the repeat button down and push a whole buttons push a whole bunch of buttons and do a cycle the button doesn't clear so alright so that's basically the cover let's put everything else back on next up we have these decimal indicators they go basically in between these keys like that so then you can rotate them shiny side up actually I think that was supposed to be white but anyway it goes like this and you can see here at the bottom these screws actually go in these holes and then we also have this so that goes in there as well so we just need to loosen these screws up and get the bottom part in or no let's go get the top part in first so that we can just slide these in so we have this screw and I did purposely or purposefully screw all of these in first because we needed to get the plate the top plate perfectly flat so that all the parts underneath were in the right place so speaking of that I think that in order to construct this in order to put this together they must have used some sort of a tool that was like a big piece of sheet metal that had slots that went all the way across just one slot all the way across and I think the purpose of that well I know that the purpose of that would be to align all of these stems probably in addition to these tiny little stems that I really hate but it seems to me that that would make putting the top plate on a lot easier because then once everything was aligned you could just in theory push the top plate down and then pull pull that plate out so that seems kind of like a reasonable idea to me we have this oops did I yeah this is going to go like this in this orientation so hopefully when I pull these screws out the plate doesn't pop up because that's kind of bad all right let's just hand tighten these screws in here just so that we can get everything aligned properly go so that's this one and now what we're going to do is we're just going to oh yeah we need to definitely loosen the screws on the bottom and the top plate is a little worse for wear I mean the the top screws they are a little loose they are a little worn at the top the paint is coming off you know because I keep screwing them on and off and on and off I think that maybe when they put this together they must have given it another dab of paint okay so these guys will go here and I'll fit I'll orient them all in the same direction yeah I guess it doesn't really matter and then I'm just going to one by one place these in their holes which is fairly fairly straightforward or not I think I think probably because these can bend well no they don't they don't really bend okay so I'm just going to lean it up like this and then I'm going to put all of the things in all of the stems in why is it being so difficult almost yeah okay so they're all in so I can just lay this one down carefully make sure this the parts are all in there yes and now I can just hand tighten these screws just to get them in place yeah this has a bend to it so what I'm going to do is tighten up this bottom screw here but not all the way then I'm going to tighten up this screw but not all the way and then this bottom part is a bit bent so I do have to put the tops back in and just sort of hold it now I will just put the last screw in okay now I can tighten up these other ones make sure the top ones are tightened yes okay so that's basically how that works the idea is that they would all be facing this way so that they sort of blend in to the background but then when you wanted to put on a decimal like let's suppose you wanted these to be sense you would just do that and you would say okay that's my decimal indicator and it it does look like this was probably white at one point or maybe there really isn't any paint on it at all because it's all kind of shiny so yeah well in any case it doesn't really matter because again the rule for antiques is that you never restore the outside you maybe take some of the dust away you maybe take some of the dirt away but you never ever repaint ever you don't fix scratches you don't do any of that stuff because otherwise it doesn't look authentic okay oh and notice that this key is now restored it's got the hole in it which this thing goes into so that if I rotate this and attempt to clear it you can see that the one key does not rise if I turn that now the one key is cleared so so that's the correct thing all right I think the next thing that we're going to do is we're going to put the carriage back on so let me alter the camera angle here so that we can see the top so here is this should we do that now or not well I think we I think we do need to because we at least want to test that this is actually working I have my doubts about a spring that went in here I think that the spring was maybe pulled a little too hard because you can see how it's kind of loose a bit when I do that and I think that if the spring were tighter you wouldn't get that play so I have a little bit of doubts about that so let's put on we have we should have spring on either side or at least a spring here yeah so the thing is that I think when you put this on yeah actually this spring goes on this side the idea being that I think the idea is that you know you want to have this range of motion here but you don't want the the sides banging into the walls so it's not going to be like this is definitely going to be like this so you can see that the spring prevents this from moving any further in this direction so then in the other direction it's going to go like this like this like this and then so the real question is you know should the spring be over here or should it be over here I'm going to put it over here and I'm going to get the rod here which we know goes thread side that way this is just a slot cut in there so we'll put this on and let's see what happens so put this through there put this through there put the spring on there and just oops I missed and you do have to lean this forwards in order to get to line up properly so you just sort of push it in I'm not going to screw it yet all right so that's that let's make sure that the huh so you see these locks are now in place or are they they're not in place okay so the idea is that we should be able to well I can lift this just to help it along and attempt to rotate this like that yeah that's a little that may need a little bit of adjustment not sure what kind of adjustment ah okay well what's happening was again because this this axle is loose it can go you know in and out and if it goes in a little bit you'll end up locking this so let's just make sure if we go all the way down to the end right that's it so this last digit lines up with this last with this last row of keys so we can go one two three four five six and that's well six and a little bit so you can go six positions this way so that's interesting that's right there is there does not appear to be any more room let's go ahead and lift the lock oh that's interesting I can't actually seem to pull on the lock oh well okay I guess I can yeah so that's about as far as it's going to go I'm not sure I'm not sure if it's supposed to go further because if it if it can go further this spring could possibly be on that side well let's do that experiment let's put the spring over on the other side and see if this actually moves just ever so slightly over so that we can get seven digits instead of six six digits of movements in the carriage so let's go ahead and remove that let's go ahead and thread the rod back in and we are going to put the spring on the other side see if that makes a difference so let's bring it all the way back okay so there's zero so we have one two three four five six seven okay that's obviously where that goes good so we'll do that right yeah it's not going any further so so we'll call it seven digits that is a little bit odd though because if we do that this gear does get exposed so I don't know about that I mean you do get seven digits but on the other hand you get this part exposed which you never really want and yeah okay so I can check the video and I can always correct this later but let's see it would probably have been here and that part would be exposed anyway okay let's look let's just leave it like this good enough let's let's test the mechanism so I'm going to bring this all the way down to zero I'm going to run the clearing mechanism good now as you can see that the the carriage lifted as I was rotating this and then it dropped into place which is the correct thing let me install this crank right on the side here get it lined up and pull this out okay so that way I can turn it more easily so let's I put in a one and I forget if this is non-repeat this is non-repeat so let me put it on repeat so we should see is the first digit loading ones one two three let's see if the carry mechanism works five six seven eight nine aha okay yeah that's interesting the carry works on this one but there is no carry over here in fact this digit turns red which I guess would be negative numbers so we can subtract let's get it to the right ending position subtract let's put in a nine and run it oh that was an eight sorry 16 24 32 let's just give it another couple of those 80 98 96 104 yeah that's working let's put in some nines at the top okay some more nines all right to me that seems to indicate that it's working pretty well let's do a subtraction let's subtract three zero zero one five so zero one two three zero zero of course I didn't need to do that one one one two three four five and subtract hmm oh there was a nine here yep I should have pressed clear so now I can subtract the one from here okay there we go so we've got a total of a hundred million now so and we can rotate the carriage over and subtract that one if we wanted to and that was a nine and I subtracted nine one zero zero okay so clear that yeah we've got nines here now so I wonder how the bell mechanism works because if I'm doing some subtraction right like let's suppose I'm okay let me just do an ad okay so now you can see that there are all zeros over here now if I do a subtraction of like one from here I should get all nines here right yeah but the bell didn't go off why didn't the bell go off well I mean the bell is on so one possibility is that the carriage has to be in the farthest position maybe so let's see what happens if I subtract one now oops that's add one hmm okay well it didn't seem to ring which means that there may be something wrong with the bell the bell ringer let's see if we can see any possible mechanism on the underside yeah there there is there is this rotational thing which is very difficult to rotate and I think that's probably the main reason so I may want to look at that to see because this little gear over here should probably just you know go ahead and ring that thing every time it turns maybe yeah see that was supposed to I think ring the bell I think I'm not really sure okay that was actually interesting if you'll notice see I can't move it that's because whenever this thing changes over from 9 to 0 or from 0 back to 9 that locking mechanism goes into into play so if I let this go and then continue I can continue right now if I'm subtracting let's suppose I do this and I'm subtracting oh well that actually seemed to work okay I'm not sure why I'm going forwards and it stops that's interesting I don't know why the mechanism isn't working backwards or if it's even supposed to work on backwards I'm pretty sure it is actually supposed to work backwards it's just that because the bell mechanism isn't isn't working the bell mechanism is also connected to this this little locking mechanism so so there may be a problem over here but aside from that I'm pretty pleased with the way this works this has worked out there's some you know there's some not really grinding but some sort of a friction noise coming from here that may be just the gears I may want to track down the location of what's going on there in order to put some oil in there to prevent these parts from rubbing and deteriorating so let's go ahead and put I've got a whole bunch of screws and things over here which need to go in so let me go ahead and do that that is going to involve putting these plates back on basically I'm first going to just you know give them a little clean there's some oil in here that I'm going to get rid of with the industrial maintenance coating thinner and then we should be good to go so let's let's go ahead and do that so what have we got left well we've got these four feet and I believe at the beginning of the series of this playlist I did say that I was missing that the back feet were missing they actually are not I just forgotten these and we have some we have four thick screws we have four large thin screws we have one large headed screw we've got eight of these small screws and then we've got the handle we've got the set screw or actually not a set screw it actually goes through so it's not a set screw but it's a screw with the handle and this thing that goes on to the handle like that so the unfortunate thing about the plates is that you've got this round hole that's not a U shape which means that you have to put this on before you put the handle on but I believe that the first thing that we can do is put the base plate on so here's the base plate and what we are going to also do is move the camera a little bit so face the camera up a bit just a bit like that so the first thing I'm going to do is take the carriage off so that I can turn the calculator the entire calculator upside down and there goes that spring I'm going to have to oil that can't forget that and I'm going to take the crank handle out okay now I'm going to just turn this upside down carefully before I do that let me get some oil and just oil the the gears here because I think that once I put the covers on it's going to be a little bit difficult to to get to that should be enough to distribute the oil when I start turning the gear so let me go ahead and turn the gear a couple times you know there's still about scraping sound I don't really know where that's coming from seems to be coming from this side so I'm just going to put some extra oil like I don't know here probably won't do anything but okay that's fine so let's see let me take the crank handle back out turn this upside down these gears facing up and let's put the base plate on so the base plate consists of two parts one is this mat which is reminiscent of an ink blotter and I think basically it's to catch the oil on the other side it's just I don't know I'm pretty sure they cut this out of ink blotter material so let's see which way does it go presumably it goes this way I think well okay so we've got these two we've got two holes here they obviously line up with these so if we attempt to line these two holes up like this the back falls out basically so obviously it goes in the other direction let's just put this in place first and then we can put this in place like that eight holes implies eight screws doesn't it however I know that the small screws these guys I believe are for these so it's obviously not going to be those and I maybe let's see hmm I should probably check the video okay well it's obviously not these screws that's for sure because those those don't work at all so it has to be these thick screws so let's go ahead and put these thick screws on the inside maybe the inside sounds good enough obviously there should be eight screws well no okay I don't think that's right but it could be eight screws so just finger tighten these guys so now we've got these guys right which go in did they go in there no do they go in there no this one goes here well this one does seem to fit here obviously goes on the back because you want the back to be raised so that would be like that this would have to be yeah this would have to be here like that go ahead and get a thicker screwdriver and tighten these down I maintain that there should have been washers here okay and then let's screw these bottom ones down first and then we can just spin these on or not we do have to screw them on screw these feet on so these are pretty ugly rubber feet I don't know that we're going to be able to replace them I don't know that we want to replace them but it would be kind of nice because I'm certainly not very soft but then again they don't have to be that soft okay that should be that they now there are actually threaded threaded holes on these four sides so maybe that's where some other kind of foot goes I don't know or maybe they're for shipping screws that's entirely possible in fact I think that's very likely that these were for shipping screws so that's kind of an interesting discovery all right let's turn this over okay see that's how it's supposed to stand just like that yeah it's a little wobbly probably because the feet aren't very aren't in very great condition but you know I guess that's okay okay so let us now go ahead and put the front plate on so let's move the camera a bit let's try to move the camera a bit I guess that's pretty good so so here's the front plate obviously we have to put it like right right here the I believe it fits on the inside the bottom like this I don't think it goes on the outside like this I'm pretty sure that the bottom actually fits inside I could be wrong but in any case so so we have this little piece and then we have the handle and the screw this little piece goes over here on top just like that just like that and then this goes in like that and then the handle line that up the screw on and get a small bit oil that first because I know that these screws are always a problem to get off okay see and now it doesn't move back and forth anymore which is exactly what we want rotates it does rotate doesn't which kind of means that we want to oil that part that I just put on so as easy as taking it off oiling the inside bring some oil here sliding it back on there we go now it's a little better all right see this is what this is what really annoys me about this part because I have to put this on first all right now it's so oiled up and working well it slides around there we go that's very nice all right good so all right so now we've got this basically hanging off there so the next step we've got this let's see all right so we've got eight small screws four long screws and a big screw so where do they go so this part is the left hand side so let's take a look at that and actually if we spin this around you can see these standoffs here one there's one over here and two and two others on the other side I think that's really the purpose of these these long screws so that gives us a good clue so let's go ahead and put this on this goes over top like that you know I think now that I look at it it's pretty clear that because this actually goes out it's supposed to go over the bottom piece I think that may be true of this piece as well just a bit odd because over here right over here is the the model number and the serial number okay so that would be covered that's fine that's okay unfortunately now we need to take the front handle off again so let's just do that lift this up put it back screw it back in so just like that and now we'll put this plate on so it'll just fit right over it just like that kind of and what I'm going to do is I'm going to fix it in place with the long screw so I'm going to apply a little bit of oil to the screw line it up with the stand off and screw it in am I lined up let's just go ahead and tighten that up I really need a bigger bigger bit okay and another screw here on the other side maybe getting this a little bit backwards because I may have had to put the back plate on as well okay turn it around very nice here's the back plate yeah the back plate actually goes inside here so it can just slip right in just like that and then I can turn this around and put on the right side plate make sure it fits on the front just like that I got these long screws put them in the standoffs oh yeah I know what this is for this is for the carriage shaft off here get that lined up I think it's quite lined up there we go and now let's start with the back first we've got the eight short screws they just serve to put the plates together they don't actually attach to the frame but I'm going to oil them nevertheless so they just go in these four corners here okay and now the final part is to put the carriage back on so let's go ahead and do that so we take the carriage rod and put it in oh we were going to oil some things weren't we so we definitely need to oil inside here and here here and here put it through and the spring on this end all the way through the screw over here where my oil go that should be that the very last step well the second to the last step is to put the crank on sorry I just have to look at it and the final step is that we have all of these buttons to put on so let's see let's take a look at the set of buttons we have I did try to clean them so the camera down I did try to clean them but they didn't really clean up that well and a few of them are cracked so here we have a clear button this these are some pieces of buttons there's a repeat button and there's the non-repeat button so we know that the clear button goes on the bottom and I'm pretty sure that the non-repeat goes on top so what else have we got well we've got black keys and red keys the red keys are the zero keys so we've got some of those this one is cracked so I may try to maybe glue these pieces back on unfortunately let's see we've got seven of those and one of them is missing apparently alright so I may have to do some 3d printing anyway and we've got what appeared to my eye anyway well it's kind of hard to say but I think there may be more black keys than white keys so how many sets of nine do we have four eight nine there's one set of nine two sets of nine three sets of nine five six seven eight nine four sets of nine and one two three six nine five sets of nine so we've got clearly five sets of nine and three sets of five sets of black and three sets of white okay so I'm going to carefully take these broken plastic pieces okay so we can simply put them on we set these aside so we will raise the camera slightly like that and we'll deal with these three keys first so we know that the bottom one is clear the top one is non-repeat I'm pretty sure and the next one is repeat okay clearly the bottom ones are zero and unfortunately we are missing one zero this is one of the broken keys but it fits on pretty well anyway and there we go and there we go the calculator is complete all the buttons are on except for the one missing zero button but that's okay so just a few of the problems the first problem is that the bell mechanism doesn't seem to ring the second problem is that there is a zero key missing but aside from that it all seems to work pretty well let's try a calculation shall we let me move this all the way over okay let's try a calculation where the result is going to appear at the top so we will load up 22 over here let's clear out the top register and divided by seven so we're going to click on repeat we're going to subtract one two three now we know that we're going to overflow so I'm just gonna keep going and then we subtract went too far okay so the result of 22 over 7 is 3.1428571 I'm just going to check it with my with my calculator just to see what that is 22 divided by 7 is 3.1428571 all right so there we go that is the Monroe K calculator nearly fully restored let's see if we can zoom out slightly again a few problems with it but other than that it seems to work pretty well and I got two buttons reversed these two buttons reverse so I can fix that anyway I guess that's about it so thanks for hanging on for all of these episodes there were quite a few of them and it took quite a long time but we were all learning along the way so go check out my other playlists where I reverse engineer other calculators so I'll be seeing you bye