6BT Powered Oshkosh Plow Truck, First Start in Over 10 Years!

got another one i gotta fire up uh this one is an oshkosh uh plow truck meant for plowing things like airports and stuff like that now the real nice thing about this it's been repowered with a 6bt cummins so that's nice but it hasn't been running for many years uh the starter was intermittent and then just stopped working so that motor has been sitting for a long time not turning over whole truck's been sitting luckily it's a diesel so like they oil themselves internally with the fuel being in oil they're really uh don't get stuck as often i better knock on wood on that one so i'm hopefully the motor's not stuck hopefully it just spins over and we just take care of the starter issue and get this one fired up [Music] now over here we have the battery box let's see what we got going on oh we got a hold down let's get rid of that looks like the whole thing just comes right off all right get this whole battery cover off of here oh there's batteries in there i already have a great feeling about this we've got battery clamps that were meant for a round terminal bolted through a flat terminal that's meant for a ring type terminal get one ring terminal ring terminal going to a round terminal and then um another ring terminal another round terminal uh this that that's a power wire hooked right up to the positive side oh no that's the negative all right so we're just going to remove all this stuff but sorting through the old battery pile i found two good sized group 31s that showed at least 11 volts on each one of them so i'll hook them up in parallel that should be fine first thing i'm doing you'll look around for things that live here because this tab door hasn't been opened in a long time um but i don't think i see anything scurrying i don't see anything flying i don't see though there's a hornet's nest [Music] uh looks empty though there's something in here let's just just knock that out of the way all right now no more nests in here uh let's see we have instructions for cold weather starting but it's warm so we're not gonna do that all right now i've never used this before so i don't know how to operate it i see a battery cut-off switch here so i'm assuming that needs to turn on um that looks like plow controls appears to be a shifter uh this says not for parking so i'm guessing it's some kind of break that you don't use for parking uh maybe a transfer case yeah all right we got instructions on the door we have a 1 1 2 3 r reverse not 100 sure about that pattern that's a little bit of an odd pattern it appears there's two reverses and two first gears and then we have the transfer case so uh that's good um differential locks oh that could be handy let's see roto light headlight plow light clearance lights stop lights headlights heater actually those look like indicators that when you switch it on they turn on maybe uh we've got a full engagement and let's see all right the volt meter got a full meter and that's let's see come in though there's a whole meter there you can't really see it in the sunlight but it looks like we have voltage we have buttons um we have a buzzer um that is indicating low air pressure so we must have air brakes oh hey i like this one it is the speed racer function which maybe is a button maybe it's this i don't know but i like it uh air brakes yep there's a parking brake thing okay let's try this again all right he doesn't do anything there's a button right next to it make sure looks like there's only one neutral so that's good all right neutral nothing huh all right so it looks like it is for starter and it doesn't work which corresponds to what i was told is that the starter doesn't work right [Music] now i watched the volt meter when i pressed the button it dropped down then a few seconds later pop back up last time i tried it i pressed the button it went down and stayed there the voltage was like it was drawing a lot of juice but it wasn't doing anything so it looks like the starter is trying to operate not actually operating and possibly getting stuck in the trying to operate position so i'm just taking that starter out i don't want to cause a fire here got the starter out and the proper test equipment a screwdriver yeah we're getting nothing something's definitely wrong with that starter which means it comes apart now i've got the solenoid off i want to see if the motor works directly that doesn't sound good yeah that's not a good sign something's wrong with that motor so now on this starter this is the motor section that's a gearbox could be bad bearings could be bad brushes could be bad bearings in the gearbox so these two long bolts take off the end cap take off everything we're just going to start taking it apart we find what doesn't work it's one long bolt on either side and that sandwiches the whole thing together now there should be brushes in here somewhere so let's see if they go flying there they are all right they have a couple screws that hold the brush retainer to this end cap let's pop those off there we go there's a retainer for the brushes now these brushes they're all on springs so if the brushes are worn out or the springs are stuck they can just not touch and that would be a problem but they actually look all all moving freely and look okay so i'm going to look into the bearings as an issue all right now here is the whole brush assembly this is the windings that actually create a magnetic field and that all comes off as a unit now we have that bearing seems okay all right here we have the axle armature it's got a bearing on either end which both seem fine i don't see anything really burnt or scraping here the let's see it's a little dirty on all these contacts here i can clean those up those usually aren't the problem but uh maybe now in here we have the gear drive you can see that's where the there's a gear tooth on the end here that engages those gears and uh that all spins free so uh so far so good i'm gonna go and clean this up i've got some 1200 grit sandpaper you don't need this fine it's just what i had it's actually going to take a little longer scotch brite works whatever rubbing in the dirt probably would work there we go a lot cleaner now a lot of residue in here i'm going to go ahead and clean up that inside a little bit maybe something's being shorted out but i don't think that's too likely now i just blew this out with an air hose and most of the dust came out looks pretty decent what i wanted to show you was this little pin that's actually an indexing pin there's a little hole in the casing as long as you get it lined up it all just slides back together easy now brushes can be a pain you got four spring loaded ones they all are trying to compress together usually i'll do is i'll push two of them try to slide one side on first and then get to the other side oh there's one there's two there's three and there's the fourth one now we slide it on just be gentle and it'll work i'm gonna put these little screws in first in that brush holder then i can wiggle this around a little bit as a unit get in the right spot to get the long bolts in now that's what's supposed to do now while i got it out i'm gonna check this solenoid to make sure those contacts look good it took me a few minutes to figure out how to get this cap off um i thought you could just unbolt it but these electrical connectors are soldered on the outside so you actually have to unsolder them first like here you have to unsolder it and then you take the cap off so not the easiest thing to take apart but it's a part and i'm glad i did because these contacts are pretty pitted that one in there that really needs a good cleaning so uh that could have been causing a low voltage situation originally now this contact is crimped on i don't have any way of reattaching that if i take it off so i'm going to kind of clean up this contact while it's inside here i heard it started going out a little bit it looks like this will work [Music] this disc actually floats on here so it's spinning while i'm wire brushing it so it's getting it all pretty evenly now these a lot easier to get to and i'm going to use a file to make sure they stay flat now that disc is going to hit both of these that's what actually makes your contact so as long as they're in line with each other that disc will float and make good contact that was probably the original problem now i've been filing for a while you can see there's still a big groove there that actually was real deep so that was definitely a big problem i'm still not even all the way cleaned up you can see the pile of copper and what's on my hands that's how much that's not even all that i've taken off that's just some of it so this thing was really roasted a lot more firing i'm still not there there's still a pic these are definitely contacts that need to be replaced so i'm gonna call it good enough and put it together and see if it works i got to get these wires through the holes and solder them back up after i get it bolted together whoever designed this system uh they need to redesign it because both these connectors when they have loose solder in there that you've already taken off and desoldered it sort of sticks in there it's hard to get the wires through and you need to do both at once in order to get it straight down i've been heating it to get one side to melt and tightening that bolt down a little bit to get the connector slid over but i don't want to do it too much i don't want to bend the cap so i have to switch to the other side and heat this one and go a little bit more on this other bolt and keep repeating until i get that cap all the way down and then i've got to solder these connectors back together so uh definitely not a repair friendly system we go but we'll get it we're not giving up on this yet otherwise i have to spend money you need a good soldering iron for this you got to get a lot of heat into it those regular pencil ones i don't think you'll ever do it [Applause] now that looks like it'll do something you could actually take a nap while working on this one it's in now i gotta get out now that i actually think this is gonna start turning over i'm gonna check the fluids um yeah hopefully it has some hmm radiator looks dry so that's not necessarily good there's a dipstick behind the spider web huh that was really over full well at least it has some let's see if it turns into a milkshake when i turn it over yeah i guess that's all that really matters than that let's crank her over let's push the button and see what happens yes now that part was almost too easy uh i didn't want to leave it running too long because i want to get some coolant in there but looks like we got a runner got enough coolant in it to uh see the level in the radar it's not up but it's enough and uh now let's see if it'll move now the oil pressure came right up uh so at least that looks pretty reasonable air pressure started to build up i don't know if the brakes are going to be stuck on so we'll find that out and who knows what else will happen but let's see if it'll move [Applause] [Music] [Music] [Music] [Music] it moved i have an air pressure problem with the brakes let me show you this line right here seems to leak a little bit go figure but when it builds up pressure i get it pouring out here it gets real loud in here so i gotta fix that before i go any further i had enough length i was able to shorten up the line and reconnect it hopefully that stays together let's see how it does it's got a horn [Music] [Music] [Music] good i only got a few feet either direction to go that plow is a menace you can't see it so i don't know what i'm hitting till i hit it hit it back again [Music] so [Applause] brought my grand cherokee over here to get a sense of scale average size 4x4 plus size 4x4 it's not a small truck especially not when you drive around the woods [Music] [Applause] okay i may be feeling a little dumb here i've been fighting the steering of this it's the most miserably difficult steering i've ever seen i got air on the tires so they weren't flat didn't get any better and they just kept maneuvering it and i noticed everyone's smile was a little bit better and then i realized i saw this earlier on there's a canister here labeled atf i didn't know what it was for because you know i figured you know it's not an automatic what would you use it for didn't give it a second thought i think that's uh power steering and has a dipstick and it's not on the stick so i'm going to add some atf here where it says atf and see if that fixes my steering issue yeah it's got power steering now i feel dumb but at least i figured it out eventually though this thing's a little tall normal vehicles actually fit through here pretty easy even the power steering fluid still not good [Applause] [Music] [Applause] [Applause] [Applause] [Applause] [Applause] [Applause] [Applause] [Music] [Applause] [Music] [Applause] [Applause] [Applause] [Applause] [Music] i'm kind of liking that truck that thing's fun to drive now you may have noticed this plow is really jerky when i use it the main reason is this truck has a huge hydraulic pump for a big cylinder that cylinder is meant for a light duty truck like a one ton so that's a little bitty plow cylinder for this thing there's so much fluid volume it moves really fast now the angle cylinders have the same problem they're small too it flips back and forth really fast if i can move the lever the lever is stuck going slightly to the left um i haven't been able to move it so i'm going to take off the plow for now since we don't need it anyway and i don't want it constantly pressurizing one cylinder what i'm going to try to do is get a line that connects the two angle cylinder lines so fluid will constantly circulate through it hopefully as it warms up and circulates that'll actually run through the valve and free it up maybe we'll see well i got the plow off so uh now i can actually drive around without hitting things then i went and found some quick disconnects fittings in a bin and a hose that's way too long right here are the connectors for the angle plow basically one goes to each one way cylinder so it pressurizes to move that way and then acts as a return to go the other way when the other cylinder presses it uh basically what i'm going to do is i'm going to dump our fluid from the one that's pumping out fluid back to the return and circulate it through the valve with this hose so at the least we won't have the whole system pressurizing on one circuit and not being able to flow at all um i was originally thinking that this would help the fluid circulate through the valve and that would that might free it up i don't think so now let me hook this up and i'll show you why this part's easy there we go all right so now we have a circuit where it'll flow through let me show you this hydraulic system now at the front of the vehicle here is a hydraulic pump and that is driven directly off the motor going here in the engine compartment you can see there's a shaft drive right off the crank pulley going forward to that pump so that's a nice direct drive system then the pump basically here's the intake which apparently had a few leaks on it here and there um i'm sure that works fine and then it pumps out and then goes backwards my experience with airport plow trucks is quite limited i expected it to go back to a valve in the cab where the levers are so here are the levers but that's not a valve right there those are two push pull cables you can kind of see them in there and those cables come back here and go over there they are they go right here to this valve block so these aren't inside at all they've been exposed to the weather in my experience with push pull cables those are probably frozen and that's probably the real issue but here we have the valve yeah we got main pressure coming in then it goes out to all the various things and then returns and then it has this huge hydraulic tank with a temperature gauge so you can see if your fluid temperature is getting high i'm going to spray penetrating oil on where the the shafts go in hopefully that might freed up i'll spray penetrating on these i expected to push pull cable it's the real problem then after the valve we have the lines that go you can see here all the steel lines and those go back up front to do to here where we have the angle and the lift cylinder so you have the fluid coming from the back of the truck pumping through here pumping to the back coming back and then returning back so pretty much this fluid crisscrosses this truck a number of times and the valves aren't anywhere near where the controls are uh seems more complicated than it needs to be but it works and they've been building a lot of these things so they must have some good reason for it next i'm gonna have to put this thing to work but uh right now i know if you could hear it it's raining and it's only going to get worse so i'm calling it a day i'll leave on a successful note of a truck that runs and drives and can do stuff and i'll go find something else to do that's indoors but uh hope you guys are having fun and i will keep having fun too we'll see you next time and eventually you'll see this thing do some work [Applause] [Applause] [Applause] you

Channel: Low-Buck Garage

Views: 296,533

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Id: cVFeKJoWEJk

Length: 31min 21sec (1881 seconds)

Published: Fri Jun 24 2022