My N50 (ML- 16472) buzzes in 2nd and 3rd gear. If, while it's running, I put just a little clockwise pressure on the shifter handle, the noise completely goes away. I'm pretty sure the noise is the shifter pin rattling against the cam-plate. I just finished reassembling and re-grease-packing my N50 (in part to alleviate this problem) and this did not seem to work. No setting of the screw(s) on the bottom of the planetary seem to make any difference. I cracked open the gear housing again to see if I could see any obvious problems. One thing I noticed was that, no matter where I moved the shifter pin, the sharp rectangular stopper-pin on the far side of the tumbler-yoke never came in contact with the tumbler-yoke-stop. This was true even if the yoke-stop was fully extended by tighening the external set screw that governs the yoke-stop's travel.
Could the entire yoke have been bent? I wonder because shifting into 3rd gear is a little stiff, and the shifter pin rubs hard getting around the final corner of the "W" in the cam-plate.
The noise is not terrible. Is it detrimental to the longevity of the mixer to just let it be?
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Re: N50 shifter pin buzzes in 2nd and 3rd gears
I think the entire yoke have been bent.Because of this the third gear is little stiff compare to 2nd and 3 rd gear. so shifter pin rubs hard getting around cam plate..some time noise is very low but in some times mainly in rough road and up road it gives hard noise.Solution is replace the tumbler yoke or entire yolk stip.
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The frequency is the same in all gears.
disconnect the power and invert the mixer and remove the planetary after driving out the taper pin, then you can access the transmission. It may be a rotor shaft bearing in the motor or no grease on the worm gears.
Nice touch with the video.
If you need parts:
Jeff your almost there....it must be the shifter into third....it must not slide fully into third....check for wear marks on the worm gear....and try running it without the protective cover on to see how it changes from 1st, into 2nd, then third...that mechanisim if not engaging totally in third.
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.
Remove the shiny drip ring on the planetary, use a small screwdriver and gently pry it off. Remove the "Tapered pin" that holds the planetary on the shaft, gently use a punch and a hammer to do this. This pin can only be tapped out in one direction. Pull downward on the planetary assembly until it comes free. Examine the small gear and bearing for excessive wear, examine the ring gear that remains in the mixer body for wear. Clean and re-grease these gears if they look OK. These gears are in operation in any gear and as such, receive the most wear. When re-assembling the planetary re-install the tapered pin the way it came out. The previous solution will address the transmission gearing. Replace parts as necessary. Good luck. Please rate this solution if it helps you. ricardok45
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.
You should be able to purchase the manual. I know that Hobart abandoned that policy a few years back -- unless they re-instated it. Call Mother Hobart and ask. 937-332-3000
There is a few tricks to these units, it would be tough to convey here. But here goes...
Remove back cover. Loosen 6 or 7 screws around outside of motor windings. Thump the nose of the mixer downward to break the seal. Watch for spacer washers where shafts go into motor case. Remove spring. Remove idler. Remove shifting guide. Remove gear assy. Leave beveled gears in place if possible. Clean. Use Darina II grease. (20 oz) Clean and permatex "seal". Tighten mounting bolts. Adjust set screw at back of planetary. (Double set screw. The first one is to lock the adjustment.) Test in 1st and then 3rd while turning the set screw. You just make it quiet for a proper adjustment.