Hobart D300 Mixer, Will not shift from 2nd to 1st gear without coming to full stop, Ideas as to source of problem? It also seems to be making increased noise.

Best guess is that the gear for 3rd speed is seized together with it's brass bushing and the center, large transmission shaft. I don't recall which gear is for 3rd, but the transmission has two gears (2nd and 3rd speed) which have brass bushings in them. The brass bushing should spin freely on the center shaft (when in final position - sometimes they pull off the shaft tough, but spin freely when in final position, my opinion is that this is OK), and the gear should spin freely of the brass bushing.
My guess is that the 3rd speed gear, being seized to the center shaft, cannot freely idle on the center shaft, which would result in being stuck in 3rd gear.

Sounds like the keys in the shifting sleeve may be sheared. The transmission will have to be disassembled and checked for broken parts. Check www.hobartservice.com for your local Hobart office.

pack it full the grease seems to find a way to move a way from the gears after a while so you new grease and pack it in

I have a D300 mixer and the 2nd gear kind of misses or just vibrates a little what is this?

Keys are removed using a small punch and a hammer. The punch of choice is called a ***** punch

Hi,I'm a hobart tech and repair these mixer's often.If you see oil in the drip cup then the center shaft seal in the transmission is worn.If there is oil near the transformer then the motor shaft seal is also bad.Hobart doesnt release their service manuals to the public but if you go to their site www.hobartcorp.com you can register for free and get a parts manual thats helpful.If you need help with the repair let me know,i can step you through it.

You can put in a all purpose grease. I use MOBIL 1 Synthetic Grease (RED IN COLOR) and it works fine -- you will need 3 tubs of 16oz's each tub. The cost is 30.00 or so. Make sure to get all of the old grease out and pack around each of the trans and worm shafts with the grease, then pack around the MOTOR GEAR and then put all back together. While running it make sure you can see the grease and hear the noise of the mixer through the 2 caps that are FILL caps on the head of the mixer. ALSO, you will find that you will lose 1st gear IF you have tigtened down too much on the LOCK nut, SOOOO loosen in small increments until all 3 gears are perfect and strong. ALSO, the key to noise adjustment is to Tighten (WHILE MIXER IS RUNNING) slowly the large nut that controls pressure on the worm transmission. The general rule with tigtening this nut is to tighten it till it will not tighten and then back off the nut -- IF the unit when starting does not run or it seems bound up when you first turn it back on, THEN you have tightened it TOO MUCH, SOOO back it off again (loosen it) until it starts smoothly and when you turn the mixer OFF it should come to a slow stop and not abruptly stop the mixer. Hope this helps some of you out there trying to do your own adjustments --

Sounds to me like the shifting yokes are locked up,or a broken shaft.Is there any noise?

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 [email protected]

All that I could find for you is the manual

seems their website is not up and running at the momment sorry I Could be of any more assitance to you nice mixer by the way.