Hobart A120 12qt and A200 20qt Mixer Diving Key Transmission Disassembly
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- čas přidán 21. 08. 2024
- Teardown of the first version of the Hobart A120/A200 mixer transmission. This mixer has a diving key type transmission, as opposed to the newer rolling clutch (called it a roller bearing in the vid) version.
Teardown starts with planetary already removed from bottom of center shaft and shifter removed from housing. The A120/200 service manual available for free from Hobart covers those operations as well as several others pretty accurately for these older ones, it just doesn't cover the transmission itself, instead directing to a Service Manual they haven't made available yet.
No promises these are the best methods, but so far they've been workable for takedown and reassembly on my mixer. I'll try and answer any questions on things I may not have mentioned in the vid. Good luck with your mixers!
Man, I could have used this 5 months ago - I ended up rebuilding 3 of these older mixers with diving keys and it was quite the learning experience. Nice job on this video and explanations.
I worked on those. went to Mixer School. I was fascinated by the Diving Key!
I was fascinated by the Diving Key when I fixed those mixers!
Hi Carl. I've run into an interesting problem with my reassembly. After replacing the bearings top and bottom and cleaning everything up pretty well I put it back together. I put grease on the cogs but didn't fill the case yet. Ran it very briefly in first and second and it was fine, so I refilled it with grease and ran it in first and second, and then, with the motor off, I shifted it into third. It was stiff shifting, but it went in. When I turned it on it made a bad clunk, and I turned it off at once. It had shoved one of the smaller shafts straight up forcefully enough to break the transmission case cover. (I ordered a new cover and it should be in early next week.) So I disassembled it all, and took the center shaft out and cleaned it extremely carefully, reasoning that the shifting collar could be sticking somehow. Cleaned out the case, removed and wiped off the other two shafts, and reassembled again (no grease this time). I spun it through the gears manually turning the motor, and first and second are OK, if a little noisy, but when I get to third it does exert some vertical force, but I would say nothing like the event that broke things. It does shift readily now. It seems like the gears are trying to climb apart. I just don't understand it.
Any idea what's going on? And thank you for your time and thoughts.
Thank you Carl for the video, We have a A200 Hobart (5786 - 1 were your shows 5786-2) we found out that the motor would keep stopping and kicking on the reset. So i took it to an electrical company the whole thing and they said it was the reset switch so I Drove an hour away to order my 39$ part installed and still the same. So i took the whole thing to another person who does electrical and it was the relay switch that in total cost me $300 and i got it back and it worked but then something happened. The gear on the transmission shaft broke so i ordered one on line and $350 later i get it. The video that i recorded on my phone someone stole my phone and now i put the A200 together but the planetary does not turn. It seems to me that the bearings on the centre shaft stops it from turning, will be looking around for something this weekend when im in town. Its been apart and not working since march of this year. Would really like it to go again i MISS IT.
Dern, but you're handy. I might need to dive into one of these (vintage unknown) and I just think this tutorial is excellent and I thank you for providing it. Good job.
Do a video of the way the diving key works!
But you so much this was exactly what I needed
Muchísimas gracias por este video. Aunque no entendemos nada de lo que se habla, ya que no sabemos si idioma. Pero al menos hemos visto el despiece. Estaríamos encantados si se tradujera el vídeo al Español. Muchas gracias de nuevo
Agradezco tu comentario. Desafortunadamente, no hablo español (actualmente utilizo una aplicación de traducción). ¿Quizás los subtítulos pueden ayudar? Fue generado automáticamente por CZcams, por lo que no siempre es preciso, pero obtiene la mayor parte de una manera que puede ser posible alguna traducción. ¡Gracias!
Thanks for sharing
Thank you
Mr. Fesser, Thank you for the great video. I have a 'diving gear' A120 mixer and will keep it in service as long as possible. Grease in transmission and transmission seem to be in good shape. However, a motor insulation chewing critter moved into it over winter. :{ There is a motor (rotor) bearing in the rear cover. A: can the rotor and shaft be pulled out still connected to the worm gear within the transmission or is the worm gear and front motor bearing not going to budge without transmission dissasembly? B: Can the rear housing be coaxed off of the motor (rotor) bearing and later reassembled? or am I doomed to a trasmission dissasembly so that rotor and rear housing can be removed. --Ben
I haven't pulled the rear cap on mine, but I suspect that is a good bet from the Hobart diagrams showing the bearing rides in the rear cover that you'll be able to work it that way.
Your assumptions that anything from the front requires a transmission teardown is correct. Motor shaft loads through the bearing into the worm gear, which is as inaccessible as it looks in the video.
Good luck! Hope it only got insulation and nothing important.
Just occurred to me I may have answered wrong, because I was just thinking of blowing the housing out. Getting the motor out is definitely a teardown to get the worm gear off, unfortunately.
Buen video, me gustaría saber cual es la característica del piñón que arrastra la velocidad nro 1 ya que adquirí una batidora y al revisar le han quitado ese piñón.
Hola....gracias por el video....me ayuda mucho.
Acabo de adquirir una de estas máquinas y trae problemas con la transmisión.
Was just working on one yesterday and was wondering why my center gears weren't coming apart the same way the other videos show. This explains it! Also do you have an electronic copy of the A200 manual you were talking about? I've tried multiple times to sign up for it online but I can't seem to get it to go through. Thanks!
Great job,i need to remove the not to replace the besring on the pide that you left that goles to the eléctricas motor please tell me how
Hi Carl , I purchased used 20 quarts planetary mixer and there is no gear oil but greasè. Is that possible that could belongs to this type of mixer?Do you think I can just leave it there or replace it for some gear oil?Thank you for your help! Nice video 👍
Any videos of power cord replacement for the A200?
Great video.
How does the diving key fit into gear. Mine came out during cleaning and fell into bottom of mixer. Without it, speed 1 was slower. Thx
Good video.
I got this kind of mixer, recently I changed the cord into a new because the old one looks bad , after I changed, the motor turns counter clockwise and i dont no why. Any i dea? Thank you
I just tore into mine and removed most of the grease without diassembling the transmission; I'm just replacing the top bearings. I need to know what grease you recommend, and about how much, to replace it. Thanks for any help - I really like your videos and clarity.
Hi Mark, I picked up SuperLube for mine. The old service manual says 2lbs of food grade NLGI 1 for the transmission and just enough NLGI 2 to fill all the voids in the planetary.
One caution on the grease if you're not tearing down and starting clean is that different bases don't always mix well, and I don't think the Super Lube is the same base material they'd have used back in the day.
It was a little work finding NLGI 1, seems like most places stock just 2.
@@carlfesser6673 Thank you, Carl. I ended up getting almost all the old grease out and decided to use a Lucas EP lithium based "Red n Tacky" I got at Lowe's. It looked to be similar to the one shown in another video that was published by Hobart (czcams.com/video/ceQE8PEYPPI/video.html) which you're probably familiar with. (Why they should specify food grade in that part of the machine I cannot fathom. But in the planetary you should use a food grade lubricant - evidently about 2 ounces.)
I'm a retired baker, but I won't use this mixer too hard. When it fell in my lap I assumed that it had major problems, but it's starting to look like replacing the three bearings on the top of the machine could put it straight. One gear shaft showed a definite wobble and I ordered OEM parts for the top three bearings. I really hope I don't have to dig out all that grease and work on the bottom end! Here's what I had before I opened it up: czcams.com/video/ezKPmIKp53g/video.html
I was very grateful you put together such a good, clear video. There aren't many at all and yours was a major help. I really appreciate it a lot.
@@markhull9156 As far as why to use food grade grease, it's no doubt to mitigate any risk one reasonably can. Even the best seals aren't perfect, and a little poison in a bad place can go a long way.
That is a pretty noticeable wobble. Were all the teeth on the fiber worm drive gear still crisp when you inspected it? Hope it works out with the bearing swap as well.
@@carlfesser6673 The worm drive gear still looked good. I don't have any prior experience to speak up, and it wasn't perfect to look at (still in the machine) but what I saw looked OK.
The old bearings popped right out. I hope the new ones behave as well!
Thanks again for your help and your interest. I'll post a new video when I get it back together. Parts should be here in a few days ...
hello carl i hope you can help me i have a d300 mixer after putting some new gears in the mixer only works on one speed. can you tell me if the upper clutch bushing goes lip up or down in the upper clutch gear.?any help would be appreciated
Is that entire vertical shaft assembly thing supposed to be held up by the seal on the bottom?
Hi Carl, thanks for the video. How did you get the lock nut that was on the worm gear? It’s the only thing I am having a hard time before removing the top cover.
In my case I had jam nuts on that shaft, so I just needed a skinny and regular wrench. My center shaft lock nut was a bear though, so I commiserate with you. I had to hold that one with a wrench across the lower planetary to the acorn/jam nut combo to hold the shaft.
In theory you could use the same maneuver to fix the transmission in place, but I don't know if all the keys would hold up to that much gear reduction. Mine was an all steel lock nut, so I'd be liberal with PB Blaster or Kroil first.
Thanks for the video. I have an older a200 And I too was having trouble lifting that whole stack out. Your video basically picked up where I had left off Hobart’s video. But I still can’t seem to get that next gear off Even with trying to remove the shifter at the same time. The shaft broke on my machine so I’m having to do a complete rebuild at this point I’m just getting parts off to see what’s good and what’s bad. Any help would be appreciated!
I guess the first question would be to confirm you've removed all of the planetary already? I assume so, but sometimes it's the obvious things.
Other than that, since you said there's a broken shaft, any damage to the keyway or something similar that would hang up on the seals on its way through?
@@carlfesser6673 Well… After it made it a loud snap noise End it I touched it from the bottom the planetary fell off in my hands… I just Undid the bolt/nut on the bottom that holds the shaft four the speeds… The one to the right of the main gear when you’re facing it. I can try to get a picture to show you what’s left of the shaft call it feels like it broke right where there’s a bearing but I’m not sure…
Is there a way I can post images here?
On another video they Shell taking off the planetary and a spacer and the key. As I said planetary on our machine fell off with the broken shaft.
Don't think pictures can be posted in comments. If you weren't able to find the spacer and key after the rest of the planetary fell off I'd guess the key in particular may be what's getting in the way. It's a very long key, and nothing else actually fits into the shaft beneath the oil seal, which is under the bearing.
Tengo un problema con un hobart
En marcha se frena por momentos
Y luego sigue funcionando.
El motor fue rebobinado
Y los rodamientos nuevos.
Que podría ser.
Hi Carl would you tell me the procedure on how to remove the planetary .Thank You so much
Hi John,
If yours is as bad as mine was, it's probably going to give you more trouble from the frozen grease than the hardware. A heat gun helps there.
That said, the acorn nut and jam nut is tricky if you don't have a low profile wrench or service wrench available for the jam nut, because attempting to spin just one without bracing the other just rotates the whole set.
Once you get those two off, the drip ring is held by spring loaded ball bearings. The planetary itself just pulls straight down on the center shaft, but I had to coax it with some prying.
Hope that helps!
Have a question please, took my A200 mixer apart to change one of the gear and grease but when put back first and second gear stuck on second gear speed. Any idea please
I have a spar model 5m planitary mixer need a gear for it
Hey Carl do you have any tips on removing the top cover with the bearings? The right side seems free but the left side is not budging.
Even with the 3 bolt puller mine was the opposite, with the left coming up first. I used a plastic bladed putty knife and some taps from my palm to nudge the reluctant side along so I wouldn't score anything.
A lot of *tap tap tap* *turn screw to take up new slack* repeated until it squelched free.
Dang, that is old!
Cómo se instala el capacitor de arranque y como sé pone en marcha ese equipo
Donde y como puedo adquirir repuestos...ya que al ver el video me doy cuenta que a mi máquina le faltan algunas piezas...
Hobart todavía fabrica muchas de ellas, pero pueden ser muy caras. eBay es probablemente la mejor opción para stock usado o nuevo, ya que estos mezcladores se separan regularmente si falla un componente principal.
hey carl can you show me how to take apart a d300 transmission
Afraid I have no experience with that model, sorry.
mine is teeth broken what can i do pls?
Hey Carl - how do I replace the oil gauge sight glass? Does it pop out with a pry tool from the outside? Does the replacement simply pop in afterward?
Hi Daniil, sounds like you have a larger mixer with the oil bath gearcase. The A120 is all grease, so it doesn't use a sight glass. Sorry I can't be of help.
@@carlfesser6673 thank you for taking the time to respond!
My 1st speed not moving dough.
Hi Carl A200 second and third gear works fine gear 1 spins but you can stop the shaft by hand what could be the problem?
If you can hold it with your hand, there are a few things that you need to check: balance the transmission, If it's too tight on the bottom or too tight on top, that would cause it to have issues with gears not latching. The yoke (if you take out the gear handle, the piece with the 4 screws, the piece should be flat both bottom and top you do not want a big groove in it. The springs on the top gear with the pins might have broken down and causing it not to latch, the older styles had a key with a rounded side that latched the gear, the spring might have broken.
@@josegonzalez7707 Thank you
If i want you to rebuild my hobart 200 what dl you charge
I need your help I have Hobart mixer D340 40 quart I take transmission gear out I’clean up and change oil then I put it back Speed 2 working the speed 3 working and the speed 1 not working can you help me why thank you
I have no experience with the D340, but if it's similar to some of the other Hobarts your largest gear on the center shaft may have a bevel gear immediately under it. If those two are inserted upside down I believe it could cause the problem you're describing. Just a guess though.
Hi I'm having same problem did you manage to find the fault?
Hello
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I'm a service tech doing the hot and cold side of any restaurant. I will say hobart is by far the worst, because they do not offer tech support, they want to make the money themselves. After two years of service calls, and our store selling hobart products, we finally discontinued every hobart product because, if we are willing to sell your products, why can't you offer us tech support. I highly recommend to buy another brand, never ever buy hobart. The hobart service is super expensive, because they don't want technicians working on hobart products. Never buy hobart, we no longer sell hobart because of very poor service!!!! If a technician is telling you that, think about long term service. Never buy hobart!!!
Any videos of power cord replacement for the A200?
Hi, I have A200 gear 3 spins free you can stop the shaft by hand what could be the problem?
Probarbly the key
@@delonghimagnificas9403 thanks
I'm a service tech doing the hot and cold side of any restaurant. I will say hobart is by far the worst, because they do not offer tech support, they want to make the money themselves. After two years of service calls, and our store selling hobart products, we finally discontinued every hobart product because, if we are willing to sell your products, why can't you offer us tech support. I highly recommend to buy another brand, never ever buy hobart. The hobart service is super expensive, because they don't want technicians working on hobart products. Never buy hobart, we no longer sell hobart because of very poor service!!!! If a technician is telling you that, think about long term service. Never buy hobart!!!