Powerful Electric Troubleshooting | Voltage Drop Test

Ride along! I poke at this 1961 Electric Forklift, using voltage drop to check the condition of live circuits. Making movies on the road is challenging; I cleaned up the 60Hz hum as best I could.

[@EM-fi2qg]

Will the fatality be posted in part 2? Or at least on LiveLeak?

[@EM-fi2qg]

My above comment really hits home because I cant even slide an Igloo cooler off a trailer without becoming trapped underneath it.

[@PapaWheelie1]

E30 M3 - oh god I remember that Chineese lady and the forklift. She thought she could counter balance it by jumping on the back as it flipped.

[@63256325N]

I just watched that vid.. Man that was horrible.

[@PapaWheelie1]

Duncan MacKenzie - I saw it 3 or more years ago, bad news it sticks with you. She seemed so determined.

[@Null--]

I just had to go and find that video. Jesus.

[@thedevilinthecircuit1414]

I am DIGGIN' the sound of that warehouse. It's AvE in church: "Reading now from Paul's Letters to the Philippinos, chapter 7, verses 23-25: Speaketh thou not of failure to chooch, lest ye be branded a sissy-man. Rejoice, one and all! Skookum art those that bring tools to bear upon machines in tribulation!"

[@LazyLifeIFreak]

Amen.

[@Lazarus7000]

Well we already have Gun Jesus, so I guess now also we have Archbishop AvE!

[@LazyLifeIFreak]

All praise Gun Jesus.

[@loddude5706]

'Reverend!'

[@amicklich6729]

That is a literary piece of art you just wrote.

[@crmcbrideww]

I own a Carpet Cleaning Company. One of my machines is having an electrical problem. I've been a long-time viewer of your channel. I started watching your videos with absolutely no mechanical skills. But I can comfortably say because of your videos, I now have the confidence to take apart my machine and try to fix it myself. Got it all taken apart, couldn't fix it and now I can't figure out how to put it back together. It's fucked now. But that's not important, what's important here, is you gave a fucking dummy like me the confidence to do it. And for that I salute you my friend! AVE you are a damn LEGEND!

[@jonhare392]

90% of the job is having the balls to take it apart and the memory to put it back together.

[@WeldinMike27]

AVE gave me the false confidence to take apart my leaf blower to replace the bearing. I broke it taking it apart, glued it back together, the right royally fuckered it on final assembly. then it let the smoke out. The nut was truly behind the steering wheel on that project.

[@texasdeeslinglead2401]

Charles McBride OK , so now you're at the part where you call wife's life insurance policy / new boyfriend fund. Then put your mother on speedial, and engage the safety squints.

[@johnphillip1711]

As my wife's father is want to say - it ain't working anyway so might as well have a go at it.

[@texasdeeslinglead2401]

John Phillip well I think I like your father in laws thinking. I'd almost say you married up , but then again you're hang in out in ave's alley of the internet 😄

[@rogerthomas1982]

1961? This lift was ten years old when I started fixing forklifts. Notice how the seat is up in the air? The seat brake actuates whenever the driver falls off the truck. If you sit on it or tie it down, the seat brake will release and you can continue the troubleshooting. (either that or you will have fixed the problem... red face) If you ARE holding the seat down and are still bound up, maybe the push rod connected to the seat isn't going down far enough, or the linkage at the bottom is twisted, worn, or damaged; or maybe a spring is broken.. The brake assembly should be on the end of the drive motor. You can feel the linkage by reaching under the truck, but be warned, it can get crusty down there. Also, for trucks that have sat unused for a long time, it's possible that the shoes have stuck to the drum. (if you get good fwd travel though this won't be the case) Also, it's nice (imperative) to do all this troubleshooting with the drive wheels off the ground. A good way to do that is: tilt all the way back, put wood or steel blocks under the upright rails, then tilt forward. The drive wheels should rise up as the front edge of the rail goes down. There are almost certainly not brakes on the steer wheels. Also, 100 amps should be plenty enough to move the truck so I wouldn't worry about voltage drop just yet. My advice: lift the drive wheels, travel in forward for twenty seconds then feel under the truck for a smoking hot seat brake drum. (or disk) (probably drum) Keep your gloves on. It looks like this may be a resistor truck. Drive speed in them is regulated bu huge ass resistors under the floorboard. Trace the cables from those two contractors on the right. Post the model and serial number next video and I may be able to send you a schematic.

[@rogerthomas1982]

That should be "contactors" not contractors, stupid spell check. Also after reading comments.... people guessing as to how this thing is wired... Most likely: Negative goes to A1, through the armature, and emerges at A2. A2 goes to the common NC connection at the directional contactors. The directional contactors change direction of travel by flipping the direction of the current from F1 to F2 or F2 to F1. After the fields the path to positive goes through the speed control, which on this truck looks like resistors. Someone noticed how that battery was about to drop out the bottom of the truck. Good eye. If it's resting on the steer wheels that could be your problem right there.

[@Patrick-kc5ur]

Great suggestions! You wouldn't think of those things, unless you had prior knowledge of their operation .

[@Guust_Flater]

7V x 128A = 896 W... 🙄 This old thing comes with seat heating!! 👍 😁

[@DVSProductions]

Well but it's not all heat, you are using a motor so you are going to convert most of it to kinetic energy. So probably only 100w heat if the motor is not that efficient

[@WeighedWilson]

the motor is getting the other 29ish volts.

[@Guust_Flater]

Valentino Saitz No. We are talking about the voltage drop, which is 7V and voltage over the motor is 36-7 = 29V. The current through the whole circuit is 128A. So the motor takes 29V x 128A is 3712W. And the 'seat heating', takes 7V x 128A = 896W. The total power is 3712W + 896W = 4608W, which is the same as 36V x 128A.

[@M07RealKing]

It's only drawing this much current because the motor is stalled.

[@JesusvonNazaret]

I bet the thing that goes "beep beep beep" is broken and it can't go reverse without that

[@ethanpoole3443]

Jesus von Nazaret Then quick, pick up a new pet bird at the local pet shop so that it can beep again! Clearly it’s just in a state of depression and mourning.

[@Walking_Death]

nah, this thing's pre OH&S nannydom

[@JDeWittDIY]

They didn't have the beep beep beeper back in the dinosaur days...

[@franknewling1139]

LOL, LOL, LOL.....

[@ethanpoole3443]

J DeWitt No kidding, back then they had the more primitive “ka-thud...ka-thud!”. It’s not as impressive as back then, but at least the modern “beep beep” doesn’t set off the seismic sensors, though it’s much rougher on the hearing!

[@juansalvemini9270]

You could swap fwd and reverse leads and actuate reverse. If the forklift goes fwd it confirms a mechanical problem

[@anthonyquarrell9068]

Exactly! That's some proper skookum logic right there.

[@finsfeathersfuroutdoors2460]

That's what I was thinking also

[@wobblysauce]

Almost Fixing 101 switch it around.

[@harveysmith100]

Your far too smart for the back of the class, pick up your books and go down the front.

[@stevemacbr]

Chop Cuc - 👍 .... and the best place to do that would be at the motor. . Note: The 7 volt difference in battery volts drop from each side is strange.... I Also thought fork lift trucks used multiple 2v high current capacity units in series/parallel as necessary. )

[@infoanorexic]

Gearbox issue? Bearings go out, suddenly it will roll in one direction and binds in the other? Had that happen with a John Deere B. Wouldn't go more than 6" forward, in reverse it would go all day. Dad took over from me, as the failure happened on a very steep hill. When he figured out it would still go in reverse, he turned it around and drove it on home, backwards. 6 miles. In the days of Chicken Box radio, he sure generated a lot of local chatter over that. "Why, on earth, are you driving that thing down the road in reverse?" "The view is better." Just one of the many odd breakdowns that happened, under my hands, during the summer of my 13th year. The year my C B handle went from "Master Mechanic" to "Junkyard Dog."

[@Jazzy_Josh]

>Trial Version >Please Register My sides.

[@johncantrell614]

Love the display on that clamp meter. Looks like it is really easy to read under different lighting conditions.

[@jrmusan]

Just wanted to say thanks for the motivation! A few months ago in a vijeo you told us to build stuff whether it been with cardboard or anything. I built a soap dispenser and clap on clap off tv remote with an Arduino and I just got a new really great job with an engineering company! Thanks:D

[@droptopsalvador1864]

I honestly can't tell if this is a joke or not

[@petet3025]

Denzel Morok Many truths are told in jest.

[@xTheArchivex]

Soap on, soap off

[@Texaca]

It could still be just a tech job, like a fabricator ...working with engineers, also.

[@cigr]

Nice to see video of you working out in the field. Hope we see more of this.

[@philgallagher1]

cigr Agreed! I'd like to see more field work too 👍!!

[@therealCG62]

Hot damn, an AvE video about something I actually sort of know about! Granted, every electric forklift I've driven has been young enough to be this thing's progeny, and the place I drove them for wouldn't even let us maintain the batteries (it was always fun to look at the invoices from the technicians they hired to do that and see just how many extra zeroes were on that guy's paycheck compared to mine), but the familiarity's there regardless During my last few weeks at that job, I was driving an order picker (basically an electric forklift that you stand on the forks for) and fell off the fuckin' thing trying to manhandle something or another off a high rack. Got to hang there off my safety lanyard for twenty minutes while everybody in the building got their pictures while the bossman tried to figure out where the manual release valve was for lift boom hydraulics because, of course, we weren't supposed to service these things, so nobody had any training on them beyond the controls and how to hook them to a charger. Those five point harnesses crush your nuts something fierce.

[@davidsteinhour5562]

Hey, order picker here too! ConAgra. Worst job I ever had.

[@therealCG62]

Doubt it could have killed me, never even really cut off blood to my legs. It crushed my balls because I actually had the thing adjusted right- i.e. it grabbed me and held me by my hips rather than digging into my thighs, so bloodflow wasn't really an issue. Plus, I could (and did, a few times) reach up and just hoist myself up a bit on the lanyard to take some weight off the harness. They should have had emergency procedures, but my experiences working at big corpo locations like that (not gonna say where exactly, might need a job with them again some time in the future, y'never know) is that fuckin' everything slips through the cracks until something bad happens. They never even did basic stuff like explaining fire escape routes or what severe weather protocols we had were.

[@MrTigerpirro]

This kind of makes me wish for a channel where we could share engineering/industry/etc stuff with each-other. Tips and tricks, fails, best practice, worst practice....

[@gknewby]

I enjoy the tool tear downs but I would really like to see more videos like this. I used to work on golf cars and I have fond memories of trouble shooting stuff just like this.

[@piratetv1]

gknewby my first job in high school was fixing golf carts with my dad. The electric ones were PFM to my dad and he couldn't figure them out. And i couldn't rebuild gas engines. I did the electrics, it worked out perfectly

[@geno8029]

Good idea too check for voltage drop across your switch gear (contactors, CB's etc) as well, especially with gear as old as dirt like this old jigger. Arc's and sparks were cool!

[@troy1672]

AvE, not trying to sound like one of those arm chair quarterback types. Love your vids and learn a lot from you. From the viewpoint of an angry pixie wrangling enginerd, something to consider before tearing stuff apart is to ohm out your motor and also measure the voltage drop across the contactor to ensure your contactor is good. Since your wheels were not spinning your current measurement would be a locked rotor amp measurement so it will not be your true current draw while running. A motor ohm could tell you if some of your motor windings are crapping out on you. Love your demo of using voltage to ensure low resistance. I use to always disconnect the wires and measure resistance until a gray beard showed me that trick. The moral I learned from that is, when a gray beard talks, STFU and listen.

[@MichaelSteeves]

Mechanicals are always on our case to fix a mechanical problem with an electrical fix. You put the wrong size pump in and now want us to fix it by tweaking the motor????

[@arduinoversusevil2025]

What's the problem?! it's just a setting on the drive. Sheesh.

[@stevenbrazell8460]

You’ve never seen a municipality use a vfd to get a specific flow rating out of a pump but throw balancing out the window to achieve it? Lol

[@TheTomBevis]

Good luck. I can't even get people to understand why you don't want to buy 10 gauge jumper cables. lol A co-worker of mine put one of those "you need to do this!" members through an ordeal, today. My co-worker got tired of the excuses and drug that poor guy through everything he thought needed to be done, on the factory roof, in the hot sun in 90 degree+ weather. I don't think he will complain that the maintenance department won't help out, any more.

[@korydowell965]

TheTomBevis everyone blames maintenance for problems... I like to say need a mechanic throw a brick in the woods you'll probably hit one...

[@sorin.n]

@Kbat so much powaaaaa man!

[@ulwur]

A new Ave clip and a new TOT clip the same night!!!! Have I died and gone to heaven?!

[@mtcruse]

It's been a damn fine day, indeed.

[@brokenacoustic]

Na, it'd be heaven if that one video on pornhub that youve been wanting to see but is behind a paywall just got uploaded to xxxhamster for free.

[@Aaron-lr5gw]

TGIF I got time to watch both tonight! Shop closed a bit early too, I think tonight will be a good night. Plus I'm finishing that show, One Punch Man. I'm not an anime guy but that show is a good watch.

[@christopherellis2273]

I had a hard time deciding which one to watch. AvE won. TOT in the morning.

[@qwertyasdf66]

With some abom sauce on top.

[@pekkasaarinen2902]

I have the trial version of AvECAD, but it never tells me where I should register it.

[@johnfrancisdoe1563]

Pekka Saarinen I tried the subscribe button, but nothing happened.

[@TheDefpom]

I think the voltage drop of 13/22 volts to the contractor is because the motor is wired so that it gets 22V forwards, and 13V in reverse, with a central tap.

[@jonstenSE]

The Defpom's Repair Channel I was thinking the same thing... Only problem is, here is the third lead...

[@kevinfarley2422]

Thanks so much for making that make sense and simple to understand. " Pixies have to dance in circles" will ever after be engraved in my grey matter!

[@crazysientist]

I think you forgot that if you measure voltage drop on load, you actually are measuring the internal resistance of the battery. You could always calculate the voltage drop through the leads if you know the amps you are pulling through it, just unplug the leads measure the resistance and then use ohms law. Of course that way you won't get the resistance of the breakers, but you have to calculate the internal resistance of the battery first if you want the real wire and contact voltage drop during load. Thanks for the video and hope this helps!

[@guardiansunite5013]

It was interesting seeing you work on the job. Thanks for sharing.

[@gromett]

Looking forward to part 2...

[@NicolasBana]

I'd have said looking *reverse* to part 2

[@nectouxpierre4634]

Très important la mise en place!

[@harveysmith100]

As a fully paid up member of the back of the class, I have to say, I nearly understood this. I am a visual learner so nuts and bolts and everything in between comes easy to me. Electricity is so much harder because I can't see it. Because you showed us slowly and clearly with the meters, the penny is starting to drop. My brain still has to visualise pixies flowing down the cables etc rather than just doing maths, but it works for me.

[@funkyzero]

This isn't going to be complete until we see you driving that brakeless 8k pound nightmare down some ramps off of that trailer man.

[@Docbell60]

Did you try hitting it with a hammer?

[@electronicsNmore]

I have a lot of Canadian made tools from the late 80's and 90's. The previous owner of our house in the Bahamas left them behind, when we sold, I took them. Good quality tools. Great video!

[@Nono-hk3is]

"Find the root cause and then fix it." God, how simple and self-evident a concept, yet so rarely performed. No one ever wants to wait for/pay for/understand what the real deal is.

[@finsfeathersfuroutdoors2460]

Track Craft I have never seen a more relatable youtube comment in my life I'm 24 and work with all guys over 40 so I know "nothing" and when I do tell them how to do something it is oh yeah obviously but I meant blah blah blah

[@BoloH.]

What what? Is this an actual work assignment?

[@arduinoversusevil2025]

No, this is a work for chuckles and beers assignment. But mostly, I want to borrow the trailer.

[@BoloH.]

A reply from AvE? I must be dreaming (entirely possible after a bottle of Jameson and a bottle of Lithuanian potato vodka).

[@jimhenry3128]

Joni and tissues

[@drmkiwi]

So that's the real reason why you had to get the forklift off the trailer! (And... if you were measuring voltage drop on that extension lead, wouldn't it have been the rh pin with the lh socket?) Cheers, D

[@Paulman50]

When I was working on those batterys I had my spanners taped up. Cause a major short and the top of the battery can launch itself through the roof. Normally 48v with 800 amphour.

[@bjcouche1]

My troubleshooting method would be to check what parts are different between forward and reverse operation.... If it moves forward and not reverse, not so likely it's a brake locked up... If it has motor current, it likely has motor torque with one exception: You show current in both forward and reverse, I am assuming that it lurches forward when you try to go forward, but does NOT lurch when you try reverse..... IF you have motor current, but no motor torque, then you are missing FIELD FLUX... I'd go after that reversing contactor first. I didn't see it change states in your video when you went from forward to reverse, and it should have pulled in / dropped out.

[@shaughnshea]

PEBSAW = Problem Exists Between Seat And Wheel

[@aholesahole]

Shaughn Shea Might be an ID-10-T error.

[@therealjammit]

Shaughn Shea Loose nut behind the wheel.

[@BramBiesiekierski]

We call them big circlips. All the do is hold the wheel on.

[@rpventure]

Or the IT version: PEBKAC - Problem Exists Between Keyboard and Chair

[@Andre_the_Lion]

It's a bad gasket. The gasket between the floor/seat and the bench/controls.

[@JasonW.]

In the Vancouver of BC today. Lovely day out.

[@brainstorm4207]

you have me liking videos before i even watch them. either I've been shilled or you're the best damn uncle a bunch of garage rejects could ever hope for. Thanks uncle bumble for all your bumbles or at the very least the knowledge what NOT to do lol

[@alecjahn]

Also what reverb plugin did you use on the main footage? I want to try it out.

[@SeaWasp]

Alec J I think it's an analog unit

[@orcoastgreenman]

I think it’s the “Canadian Warehouse Forklift and Plate Reverb Filter, Full Size”

[@John-wk2fd]

Funny you should say that because the reverb actually sounds like it could be modelled and put to use.

[@johnpossum556]

I think it was bathroom colostomy bag, setting #4.

[@John-wk2fd]

We could call it the Scookum Gospel Plate Reverb.

[@lilshawn2]

in b4 the seat being up actuates the brakes to keep idiots from running themselves over.

[@EddSjo]

Shawn Abernethy he wrangled the seat down in the later part of the vid.

[@pauldzim]

"The nut that holds the wheel" is the way I always heared it.

[@burtosis]

If you have a thermal imaging camera it's easy to see where the problems are, provided enough current flows to make it ever so slightly warm.

[@_Milkmanstudios]

I genuinely feel like I have a little bit of a better understanding of basic pixie wranglin after watching this one. Thanks uncle bumblefuck!

[@toniturnwald9890]

Brilliant explained. Cheers Toni

[@bubbafudpucker397]

I miss having a "getting place". E-scrappers take note: electric forklift contacts have a lot of silver on them. I lost my source of free used contacts last year. I got about 15 pounds of them over the years. Someday I'll refine them.

[@MrGuvEuroman]

I used to fix them 😀 but Diesel and LPG ones, no leecy ones. I loved the description of what's happening/voltage drop etc 👍

[@cyberbum4835]

Hey man, you should measure the voltage drop and current while the machine is running without the brace, that will tell you the power consumption when the motors are not blocked, using the values you get you can trace all electrical component from the battery to the actuator in reverse and determine if the problem is electrical.

[@brandonbrown3600]

AvE being a forklift mechanic for both electric machines and diesel id put my money on the motor or the brakes. There will be no brakes on the steer axle. They should be hydraulic brakes with cables for the park brake mechanism. Should be able to jack it up and find the access hole on the back plate to back the star wheel off the adjuster. Before doing that though make sure the park brake cable has not froze in its jacket and causing it to stay engaged a bit. If the brakes are good id check the motor brushes and also the gear oil in the diff up front for shavings. The motor likely isnt shorted in reverse as the contactor didnt look burned from overdraw. Its a mechanical issue for sure. Pull the battery before jacking it up any and save the strain on the jack. If the lead is long enough on the battery put it on the floor beside the lift and plug it in during testing. Those batterys are a couple grand each so yea if the voltage is good despite its look id leave it alone.

[@archetypalculinarian]

Did Canada not get the new quarter pounder? Don’t get me wrong, I still love ye olde Mickey D’s regular cheeseburgers, but the new quarter pounder is actually a halfway decent burger.

[@aussiebloke609]

Nice to see such a modern forklift. The last one I used was a 3-speed (plus reverse, of course) with a clutch pedal, a gas bottle on the back, and didn't come with a cage over the operator. Great times. :-D PS: And this was in the early '90s, no less. :-P

[@PoptartFps]

Reason your getting voltage is because of the battery leaching through the frame and grounding out.

[@laharl2k]

Last time i tried to find hotspots on cables with the heatgun i found a lot!

[@joewiddup9753]

Laharl Krichevskoy I bought one of the seek thermal ir cameras. It's great for that job.

[@laharl2k]

Joe Widdup Woosh! You missed the joke. Im taking about the other heatgun, the one that blows hot air xD But yeah thermal cameras are super useful for detecting faults in circuits as most of the faults generate heat.

[@joewiddup9753]

Laharl Krichevskoy You are of course correct. I totally missed it as I worked with a service guy who always got the names wrong.

[@vansien]

Lol this video is exactly the work i had been doing for the past nearly 30 years, working in heavy plant and material handling, to jump up the job title abit lol basically engineer and elechicken on forklifts. I dont envy your working on that new bit of kit there.

[@deroffi1572]

Ahaaa, according to the content of the fridge, seems like someone has been to Austria lately. ;-)

[@halnywiatr]

@ 1:05 Holy-oh-fuck! Youse can get Old Milwaukee in Canuckistan? Those haven't been seen in Mass-of-two-shits for decades .... Memories ,,,

[@mikeman230]

Did you check the parking brake on the end of the drive motor actuated by the operators seat?

[@franknewling1139]

Why is the battery sitting on a angle? I tried to ask this question last night but the F***ing Ytube took me somewhere else and I couldn't get back! Probably because it was interesting and the next thing I know, three videos later, it was time to hit the sheets. LOL, LOL

[@BaileyWootn]

I work on all sorts of material handling equipment and the crusty battery could very well be the problem. Those trucks are insulated return so if the battery ends up leaking and shorting to the battery casing you get weird voltage readings from the battery like you saw. Although I'm sure you've already sorted this you should chuck a 24v lamp between the battery terminals and the chassis to see if there's any current flow.

[@phitsf5475]

I love how the audio makes me feel like I'm about to die

[@johnlincoln4616]

Eating that cheeseburger is more dangerous than working on the forklift. Gahbage

[@sedsberg77]

Reminds me of my workplace. Angry mechanic arrives with his tools and a bad mood to check a mechanical problem on a shitty machine. Swears and mutters while laying under it with oil dripping down on him. Then I hear "Yes! It's electrical!" and see him walking away, smiling. An electrician arrives, checks out everything and says "nope! It has to be mechanical". Guess who's back with an even badder mood. :P Then repeat this 4 times.

[@fredwupkensoppel8949]

So what WAS the problem in the end??

[@sedsberg77]

@@fredwupkensoppel8949 Mechanical. Ruined bearing causing motor and vfd to overheat.

[@FllashLight]

Hi AvE, how about a vid on high pressure mechanical seals?

[@waveylense2144]

Why fuck about with live circuits for the extension cord when you can just measure the resistance by placing a probe at each end of the wire?

[@roderickwhitehead]

My pad of engineering computation paper can't connect to the AvECAD license server. Am I misreading the license key located on the bottom of this empty can of Old Milwaukee? I tried 10 of them so far and only have 2 left. HELP!

[@thepostman69]

The snap-on print looks like the 70s/80s era! Mad skookum my dude!!!

[@davidyisrael007]

The reason you were seeing voltage on the battery even though it wasnt under load is because of parasitic voltage. the acid leach and film on the battery surfaces will draw voltage and register on your meter. Those batteries are in bad condition and should be replaced.

[@gekolizzard]

Watching these vids has made me more aware of the quality and engineering that goes into any product than before. So thanks for thwt.

[@ceeF4]

If the contactor output connection is cable rather than bus bar we would generally swap over the output cable ( so direction lever would be visa versa ) and see if the problem is the same,goes backwards its a contactor,doesnt then yeh,trans is hooped!! 😁

[@bigracer3867]

Good luck with that thing!

[@HarmonHeat]

I agree that tv is boring now that I have subbed to so many great channels on KZbin. I turn on my tv and end up watching people like AvE and ToT all night on my phone.

[@484848474]

Looks like shit,smells like shit,tastes like shit........glad I didn't step in it.

[@jamierogerson8794]

if anybody one is interested i have some papers on automotive voltage drop always nice to throw the eye over before a job. so ya don't stick the pocky bit in the wrong end. ave love the chanel recomend it to everyone

[@saltysteel3996]

Total current of the whole circuit multiplied by a component's resistance will give you the voltage drop of that component.

[@MrBucidart]

I had to stop the vid at 1:01 .... Old Wilweekie, My gosh man you live in Cankackstan and have Molsan XXX available.... what were your thinking .... Nice Vid..

[@pbsgarage3486]

Whatever happened to the addendum to the dedendum? I love comparing notes with other field service types.

[@TheSummer750]

Trouble with Occam's Razor, when someone else tried to fix it first and fugger'ed her up more, and doesn't tell you! Last resort slap it around a little with some loving tappy-tap-tap? I hear some girls are into that, always the quiet ones.

[@dirk_diggler320]

U.S .military is about the only one who uses the E.C.locking connector . I know this will sound dumb . But make sure the fwd /rev contacts are clean . Back side pad too. If it doesn't see it closed or open , pixeys won't flow . Worked on old crusty forklifts for a while. Hit me up if ya want so e help !

[@lesleyboeder1798]

Not sure how old this video is. But I would pick the battery up and put it back in place.. it is sitting on the rear wheels

[@johnlucas2445]

To reverse the voltage and thus reverse the motor should not the contactor operate two poles not one. You cannot reverse the polarity with just one N.O. contact. The video show only one pole on the contactor operating. Think of a two pole three position center off switch wired to control the direction of a DC motor. In the forward direction two poles would close and provide plus and minus to the DC motor. When you want to go in reverse you operate the two poles of the reverse contactor whose output is cross wired opposite the forward contactor thus reversing the motor. I doubt that the other poles on the contactor are shunt contacts for speed control . I would suspect that the speed is resistor controlled either with stepped fixed resistor or a carbon pile. This is only my opinion !!

[@danielthechskid]

There are 3 wire reversing series wound DC motors, the common wire goes to the first armature brush and the other 2 wires go to the ends of a center tapped field winding. The field center tap goes to the other brush. With the center tap you end up with what is effectively 2 field windings wound in opposite directions for opposite magnetic polarity, hence one becomes forward and the other reverse. This setup with 2 single pole contactors is commonly used on 12v hydraulic pumps for pickup bed hay bale stabbers, RV/camper slide outs, boat tilt/trim, Etc. I have just such a pump sitting in my garage.

[@tplifttechtplifttech9227]

Operator must be sitting on seat to release park brake

[@philbox4566]

Had to use three stick welders on a roof back in the day. One lead and a couple of double adapters. Kept blowing the fuse so we just kept adding copper wire till we ended up using 8 gauge fencing wire for a fuse. Worked a treat except the lead going across to the roof from the site pole got a huge cow belly in it cos it got so hot. Got the job done though. ;)

[@nscantling]

Might be worth it to check the brushes on the motor. I've seen industrial DC motors do weird things when they lose 1 set of brushes but the other three are still intact.

[@TheMrSeamus]

Just wondering what you think of them gloves for working with, do they put the hooch in your chooch? Ye might have a video about them and if not it would be a good shout, for I'm always looking for the next best pair and your opinion would be greatly considered. If one of you folks knows about a video on them a wee nudge in the direction of it would be appreciated 👍

[@dev0random]

What kind of cheap ass runs this truck? Won't even spend money to replace the wheels. All the rubber is disintegrating on it!

[@waderedsox]

i THINK and this is just a think mind you, really jsut an educated guess, but i THINK that thats why welders call extension chords drop chords, because you get a voltage drop

[@jamesf9610]

waderedsox I've never really thought about it but that makes a lot of sense if you think about it.

[@jamesf9610]

waderedsox o always just assumed cause it was a cord you dropped down on the ground to run something

[@Blasterxp]

I can imagion this it has some sort of soft start. Dont you think?

[@AmateurRedneckWorkshop]

I felt my resistance go up to the idea of a battery operated fork lift. Real men only drive fork lifts with infernal combustion engines.

[@johnfrancisdoe1563]

Amateur Redneck Workshop So what do those gas machines use for counterweight, since they don't have a literal ton of led in the tank?

[@timreid9556]

we need a angry pixie t shirt

[@basztiancooper]

how dose it control the movement speed , is it just go or no go and the weight of the forklift slows the acceleration?

[@The_Mimewar]

It’s not often you hear smegma, and voltmeter in the same vijeo.

[@SlocketSeven]

You're watching the wrong adult videos.

[@The_Mimewar]

SlocketSeven clearly.

[@marksierra3522]

You can safely touch a 36 volt power supply. 36v across (a person) 100k ish ohm resistance is 400ish micro amps. You're fine regardless of the amps the ps is capable of delivering.

[@OldCurmudgeon3DP]

I was thinking the same thing when the volume of pixies chooched the same for both directions... Brakes not releasing. Had a similar conundrum happen on a petrol excavator's torque hubs.

[@sheonpeebles3152]

Right in the beer drinking with ya!

[@brutebetter9188]

Parking brake stuck on?

[@jburdman7]

To measure low resistance like your wire scramble example I set my bench supply to 1A current limit then read the V. Yeah I'm lazy ;)

[@condor5635]

That's a great Fluke I have the same one. Great features not used like min/max and auto hold features that would have helped you in your diagnosis. Thanks for video

[@nickmatney6605]

70%+ of Snap-On branded ratchets and wrenches are built in Tennessee! Source: I worked there.

[@texasdeeslinglead2401]

Nick Matney so .....the other 30% ?🤔

[@iaiafefe6106]

texasdee slinglead the other 30% just sort of fall out of the sky periodically, no one knows where they come from.

[@radarmusen]

The example with 120vac I quess we also meassure the shunt in the power meter, so the cable is even better than 0.5vac :-)

[@tomic0ie]

some one told me : FIAT - " Fix It Again Tomorrow" i dont know but some how this forklift suits this saying

[@driftingabstract4076]

That was helpful. I now know how to measure voltage drop. But how do you measure the voltage drop on a 150' cable going to a 60hp motor on the other side of a building?

[@arduinoversusevil2025]

measure phase to phase voltage at feeder. walk 150' measure phase to phase at motor. difference is voltage drop in the cable.

[@stephenhalliwell4720]

AvE *while under load. VDROP is proportional to current

[@burtosis]

It's funny how far ohms law will take you.

[@johnpossum556]

Or use two meters and do as Ave did in the video. Subtract the downstream (motor) one from the upstream (source) one. In general electronics are not too tricky as long as you get used to jostling connection points. BTW this particular issue is awes0me stuff to learn because this is where about 95% of the problems exist. Bad connections and heat. If you believe in probability then the next place to check on ANY circuit is the device(s) that handle the most power. Back in the crt days the HOT (horizontal output transistor) would blow on most tvs because it flowed about 50% of the total power. How it would look to the customer - "my picture tube blew" ...just to give you a very real life example. Great question btw.

[@burtosis]

If you have a thermal imaging camera it makes problem connections easy to spot provided current is still flowing.

[@bobrosebrough5829]

I agree it's probably a brake issue. Especially with that kind of amperage. Brakes always seem to hold better in reverse than they do in forward. #1 rule of electric forklift repair RAISE DRIVE WHEELS so you don't run yourself over when you fix it. That lift probably weighs as much as 2 Chevy Suburbans and I'd like to see you make more videos. -Sit in the seat and see if it rolls(seat brake). Could be that simple( that whole loose nut thing). Check that seat brake is not seized . -If it still doesn't, check master cylinder rod free play. It may be too tight and not allowing fluid to return to reservoir, causing brake application. -check wheel brake adjustment or they might just be seized. It is a 57 year old forklift after all. Thanks for the videos!