I am having the same problem

The part you see is called the planetary, it has two shafts, the long one is called the center shaft and if it is falling off you need a new planetary, the second shaft (shorter) is called the agitator shaft (the beater attaches to it, if this is the culprit then1 you are not attaching the beater correctly2 the locking pin that the beater attaches to to hold it in place is missing3 you have way too much "gunk" build up on the agitator shaft and the beater is not attaching correctly4 if the beater falls into the bowl with the agitator shaft still attached you have three additional problems a) the snap ring a top the agitator shaft has broken off or come off which in turn means that
b) the gear at the top of the shaft has come off and may very well been knocked around and possibly damaged beyond future use which means that you will need a new one and also
c) the shaft pin that holds the agitator gear in place has come out or been broken also
the fix is easy and your parts cost $ will be from $30.00 to $80.00 dollars depending on which parts you need. Now before you get palpitations, cost are listed as a possible need
1 new planetary $30.00, you may not need
2 new agitator shaft and gear assembly $27.00, pretty sure that you need but maybe not
3 new gasket $6.00
4 new gear grease $6.00 KA says 2 oz. (don't buy a 2lb (26.00 bucks) can when you only need 2 oz).


Without more clarity or a picture I can't help further. but before you start tearing you machine apart go to the KA website and get a parts list for your mixer
http://shared.whirlpoolcorp.com/product_literature/search.jsp?siteCd=KAD


let us know how you fare on this or better yet get us a little more info and we can help more.

I an sorry but the only Rod in the back of a K45SS is the pivot hinge pin that holds the motor head onto the base. if it fell out then the answer is simple. Turn the mixer upside down and wiggle the base while sliding the pin back in. Once the pin is back in place, there is a set screw in the middle of the shaft that you can see while you are replacing the pin, turn this back down with a flat head screwdriver untill it is firmly against the hinge pin. The culprit of the problem is this set screw. It came loose and allowed your hinge pin to vibrate out and then fall down or fall out as you said. once the set screw is back in place you will be fine. To avoid this problem in the future you might remove the screw entirely and put a drop of "Lock-Tight" on it that will help hold the setscrew in place for a very long time.

you are missing a pin up inside the center shaft. go here to download a parts list and you can repair this yourself.

http://shared.whirlpoolcorp.com/product_literature/search_results.jsp?searchTerm=KP2671&siteCd=KAD&userType=Servicer

The trim ring news to be ta]ed in place with a plastic-face mallet. This type of mallet does not (if used properly) Mar the surface it striks.

Hold the trim ring in place while tapping it in place. It often takes patience to get it right.

The ring is properly in place when there is no place where you can insert a fingernail between it and the mixer body all around the ring.

Hello

try this website to get the part you are requesting www.spares2go.co.uk

The Planetary plate comes attached to the shaft from the factory. It is not supposed to get
loose and come apart but it often does due to the mixer's vibrations and the user's constant
attaching and removals of the flat beater, wire whip or dough hook onto the beater shaft.
Try to remove the Planetary plate first : Gently rock it from side to side while pulling on it
to separate from the shaft. Notice the groves on both the shaft and inside the planetary
housing. That is how they are attached to one another at the factory (just friction, no screws
or pins). Now for a permanent solution:
Take a trip to Home Depot or Ace hardware and buy the J-B Industro Weld Compound
(Not the 5 minute type). Mix an equal amount from both tubes (Black and Red). Use a Q-Tip
and apply a thin layer of the mixture on both the shaft (grooved section) and inside the
planetary housing. Now re-attach the planetary plate to the shaft. Use a long strip of duct tape
to hold the plate in place (to prevent it from falling back out). Allow the epoxy to dry overnight
or at least for 8 hours.
The Planetary assembly is now permanently attached to the shaft of the mixer.

The part you need for the 727-3 is referred to as an "Agitator". It looks like the mixer shaft for the 727B but it has "ears" instead of "pins" that lock the shaft into the mixer. Same price but different name and part number.

The Planetary plate comes attached to the shaft from the factory. It is not supposed to get
loose and come apart but it often does due to the mixer's vibrations and the user's constant
attaching and removals of the flat beater, wire whip or dough hook onto the beater shaft.
Try to remove the Planetary plate first : Gently rock it from side to side while pulling on it
to separate from the shaft. Notice the groves on both the shaft and inside the planetary
housing. That is how they are attached to one another at the factory (just friction, no screws
or pins). Now for a permanent solution:
Take a trip to Home Depot or Ace hardware and buy the J-B Industro Weld Compound
(Not the 5 minute type). Mix an equal amount from both tubes (Black and Red). Use a Q-Tip
and apply a thin layer of the mixture on both the shaft (grooved section) and inside the
planetary housing. Now re-attach the planetary plate to the shaft. Use a long strip of duct tape
to hold the plate in place (to prevent it from falling back out). Allow the epoxy to dry overnight
or at least for 8 hours.
The Planetary assembly is now permanently attached to the shaft of the mixer.

Remove the whole planetary from the bottom... There should be a large nut on the main shaft...remove it ....whole assembly drops down...careful...don't drop it......At the top of the bent shaft you should see some center punches holding a thin nut in place.....drill them slightly so you can loosen the nut. There are some studs that hold the lower bushings in place...remove them with a straight blade that fits the screw snug. You can have a new shaft made out of stress proof steel shafting from a competent machine shop........MONSTROSPIZZA.COM

there should be a lip on the shaft that hold this up. You insert the shaft from the bottom and a pin goes through the gear to hold it in place. Look at the IPB HERE.