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Fein Multimaster Repair!

M

mommatnt

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Nov 5, 2019
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5
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Pat's Garage
I've got an aging Fein Multimaster.....the greatest tool EVER! I LOVE this tool!

But it stopped oscillating , took it apart and the fork is broken at the cam bearing. I've got the part from ereplacementparts.com but cannot figure out how to remove the old fork! I have the clip out but I can't get the rest out!

Has Anyone made this repair and can shed some light on the process? I don't want to just start forcing things apart and ruin the whole unit. I do not have a press fit, being a woman, I don't even know what that is!:(
 
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MoonRise

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A "press fit" is where a shaft is ever so slightly bigger in diameter than the hole it is to fit in (by just a few thousandths of an inch, if that). The two parts are forced together with force/pressure and the materials ever-so-slightly compress/expand so that the two parts are forced/pressed together.

https://en.wikipedia.org/wiki/Interference_fit

But if you have a MultiMaster like an MSX 636 or similar, check the exploded view diagram here on the Fein website (a little clearer than the ones on the ereplacementparts site):

https://vserv09.fein.bawue.com/spc/index.php?r=item/list&id=8792

If your 'fork' is actually the "lever" (part ID 410 in the diagram), then it looks like you may have to remove the "circlip" (part ID 460) first to remove the shaft (part ID 420) from the gearbox housing (part ID 400).

I do not know exactly how the shaft (part ID 420) stays connected to the lever (part ID 410).
 
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M

mommatnt

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Nov 5, 2019
Messages
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Pat's Garage
Yes I am working on a MSxe 636 ll. And yes it is called the lever that I need to replace. I did remove the circlip but I can not pull the shaft out. One article send it was suppose to fall out but there's no way it will do that. I have pulled and turned but I can't figure it out...or get it out!
 
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RKA

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Jun 9, 2010
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If there was a shaft in the center to push against, a gear puller or battery clamp puller would work, but I don't see that in the diagram. I would reassemble the tool, except that circlip, clamp the shaft in a vice and turn the body. Once you feel that shaft loosen up, I think it should drop right out?

But this is just by looking at the diagram, I haven't serviced this tool.
 
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mommatnt

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Nov 5, 2019
Messages
5
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Pat's Garage
I wish there was a video of taking that apart just like there is to get to the wiring! But no body goes that far into taking them apart.
 
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scooterbum46

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Jan 29, 2014
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South Central Michigan / ex Gulf Coast Florida
Looks like a job for Ave...

Edit: Actually, I find that Ave DID take a Fein MultiMaster apart, got to taking the oscillating thingamajig part apart and was stumped - he said something in the video about that was available only as an assembly. I think he was working on a different model Fein (FMT250Q), so I'm not sure if that were true, but if it applied to yours, I'm not sure why you were able to get just the "fork"...
 
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Dingleburry

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Mar 2, 2016
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Great white north in an igloo
Try heating it
Circlip only holds bearing and washers.

I would hold the output shaft inder vise jaws or something, or in a vise, heat that clip and pry up on the housing with 2 prybars. Migjt need to keep the circlip to hold bearing in to press on the collar of that piece.

Its either interference fit, or retainimg compound in there. Which heat should help with either one. I would guess interference fit though. Do you have the shaft assembly out of that housing? Just cut it off. Or cut it off in that housing.
 
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nmantas

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Sep 18, 2010
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Downriver Detroit
That linked post has two people calling it a fork and two people having the same issue.
So calling the part a fork and having said 'fork' fail seems relatively common....not at all a locked tight case Perry Mason.
 
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