I just received a vintage 1966 N50 that needs some gearwork. The motor runs- sounds like a big can opener- and the planetary will only spin in 1st gear, although the shifter will go into 2nd but not 3rd. Can anyone tell me how to get into the transmission? Do I need to remove the motor to get there?
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Re: N-50 rebuild help
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
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You need to remove the trim band (one screw at the back) that exposes 4 screw heads where the top cover joins the gear case. There are 4 screws from the top that retain the planetary assembly. I can't remember if you need to remove the motor to expose all of them. The motor is no big deal to remove.
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:
Sounds like the shear pin on the planetary shaft has sheared off. Has the mixer been subjected to a heavy load. Remove the planetary and see if the shear pin is intact otherwise you may have to open up the transmission.
If you only want to service the unit and not open the case, you can add grease through the gear shifter plate opening once you remove it. if you have a grease gun with a flex nozzle that's a bonus.
If not it is a messy job. Keep lots of paper towels at hand and use a narrow spatula to get the grease inside. Get as much in as you possibly can.
To remove planetary, with pin removed, spray a bit of wd-40 or other penetrating oil into where the pin came out of let it penetrate for a few minutes. Plan-A Take two screwdrivers and gently try to pry the planetary away from the body of the mixer. Plan-B Add a bit more lubricant to the shaft pin area and install a beater, then try prying with one screwdriver while putting downward pressure on the beater, alternate prying on both sides of planetary. Excessive force at the planetary top can/will crack it as it is a molded piece of metal. If you found this solution helpfull, please rate it. Good luck.
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.
The reset button is to protect over amping the motor. The N-50 is not a very strong unit, (commercially), but you won't break a gear. If you overload the unit, you'll either trip the overload (reset button), or you will break the taper pin that attaches the planetary to the center shaft.
If you're looking for a small commercial unit, and you're in the US, look into the 10 qt Precision Mixer.
hi,its no big deal--the mixer is filled with grease and its coming from the planetary.if it is bothersome remove the drip cup (silver ring) then you will see a roll pin that holds the planetary onto the main shaft.get a small punch and knock out the pin.if the planetary doesnt drop down use 2 flat head scewdrivers and pry it down.clean out the old grease and put in new grease.you can buy it from hobart or get a white lithium grease from an auto parts store.