Question about Hobart D300 Stand Mixer

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D300 mixer changes gears by itself

My D300 mixer will go from 2nd & 3rd gear to 1st gear by itself. whats wrong and how do I fix it.

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  • J. Hobart Tech Apr 15, 2014

    Tim, Did this just start happening out of the blue OR did you take the mixer apart loosening any of the planetary or the main nut on the top? IF you have removed the nuts for the planetary shaft or the TOP Lock nut THEN I will say that you probably have over or under tightened these 2 nuts.

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Posted on Jan 02, 2017

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SOURCE: A200-T Hobart Mixer 1st speed have no torque

Check the spring pin that locks the motor shaft to the main drive gear in the gear box. You should be able to turn the motor from the back at the cooling fins and watch the shaft spin in the gear, that is if the pin is sheared. That is a common problem. if you plan on keeping this machine for a while, i recomend that you spend a little more on a quality spring pin,

mechanictony-
good luck.

Posted on Jan 20, 2009

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SOURCE: Hobart N-50 mixer clangs on 1st and 2nd speed

CE is the marking that shows its european conformant.  I think the difference is mostly in terms of the no volt interlock switch.  This means the KA style N50 bowl won't work with the CE models - too low.

Posted on Mar 17, 2009

  • 81 Answers

SOURCE: Hobart D300 Mixer, Will not shift from 2nd to 1st

Hobart mixers are NOT designed to change gears while operating. The Hobart planetary gears are like the transmission in your car but, without the clutch. Everytime you change gears while unit is running you are tearing up the brass spacers, gears & seals. Time to call a QUALIFIED service tech to come out & sell you another planetary or rebuild your old one, about $2K, Buy a Varimixer if you want to change gears while unit is running, they use belts. Another planetary premature failur cause, over loading the bowl. Batters & icings- 75% bowl capacity, Dough 65% bowl capacity.

Posted on Jul 25, 2009

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SOURCE: Hobart D300 Mixer: Has no torque and no speed in any gear

You have a gear with broken teeth or one sliding out of place because the brass shims are eaten up. Hobarts have what is called a planetary, round head where the grease caps are, and there are no clutches for this planetary. These units are not made to change gears while unit is running (#1 problem of gear failure) (#2 is overloading the bowl) Hobarts need a really stiff GREASE, not oil. If you decide to take the planetary apart, get all the syrup out and replace with a stiff axel grease. It is a very difficult job replacing a gear & ALL the shims. The round head where the grease caps are can easily be removed to do this.

Posted on Jul 25, 2009

  • 5 Answers

SOURCE: Hobart A200 mixer 1st speed doesn't work 2nd

Could be that a gear is missing (broken) on the shaft that works the 1st gear. Check out the schematic at

http://www.food-equipment.com/parts_Hobart_mixers.htm

It could be the gear HM2-748

Posted on Mar 02, 2010

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It could be the gear HM2-748

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Problem with the 3rd gear on Hobart D300


Hobart won't give up service manuals The slide for your shift fork may be froze or corroded at top. The gear setups are fairly simple. The mainshaft nut comes off counterclockwise. The top gear has one way rollers with shims under the large washer. This gear assy must go back in the right way or you will break gears as soon as you start it.These mixers corode a lot at the top gearbox when they sit idle from moisture. Also check for broken gear teeth that may be jaming up he works. If you want to sell it let us know.
Dave at machinerysurplus@yahoo.com

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