Question about Hobart 4346 Meat Grinder Mixer Chopper Extruder

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How to pull auger drive shaft for Hobart 4346 mixer-grinder?

Need to replace bearings and seals on the gearbox shaft which drives the hopper auger. Have opened the cast gearbox and removed the hopper but can't figure out how to pull the shaft (with large drive gear) out of the hopper side of the gearbox casing.

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  • Lonesome Stone Milling
    Lonesome Stone Milling Feb 06, 2013

    I'll answer this question myself since we figured out the problem later in the day. The shaft consists of two parts (which we knew), and they should just pull apart easily. What we didn't know was that the clutch mechanism which connects the two shafts was frozen and wouldn't release even with the use of a gear puller (broke the cast iron drive gear figuring that out...oops). Once you have the gear housing open the large cast gear and shaft assembly should pull straight back, and then you can access the snap ring on the remaining shaft section which can then be removed through the hopper. We eventually figured out that we could loosen the clutch by locking the gear to the housing with a c-clamp, and then using a box end wrench with a pipe over the handle for leverage, on the auger drive end to turn the shaft until it loosened enough to pull. The clutch is supposed to let the drive shaft turn freely in one direction...ours was locked in place. Once the large the large gear was pulled off, the rest was easy.

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The oil seal is the resistance you feel. take a soft mallet or hammer with a soft drift and gently but firmly tap the stub shaft and it will drive out the oil seal in the hopper direction.The lower skirt of the tapered bearing is what contacts the seal so go slow.
Worked for me.

Posted on Feb 06, 2013

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2. Remove the trim ring (if any) around the same.
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5. Pry the gear up and off the shaft. Remove the square key from the shaft keyway at the same time.
6. Tap gently on the top of the agitator shaft to drive it out from the bearings and grease seal.
7. Recommend removing and replacing the top bearing at this time; it's inexpensive to replace, if you're in this deep.
8. Use a suitable diameter piece of round steel stock to drive out the lower bearing and oil seal. I don't recommend using the agitator shaft.
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10. Replace agitator shaft through oil seal and bearing, tap gently into place.
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11. Install top bearing, tap gently into place.
12. Reverse steps 5-1 to reassemble.

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