My very VERY old Hamilton Beach model 612 blender will not turn on
because the 7 push buttons are all jammed. Blender has been sitting on
my shelf unused for several years.
Since no parts are available,
I want to disassemble the case to try to free those switches.
I do not know the type of tool, if any, needed to release the two
plastic case parts.
Hamilton Beach did not let me talk to someone for assistance.
Thanks for any helpful hints.
A little more info about disassembling the plastic case parts.
Removing the rubber feet, I can insert a 3 1/2 tool inside the blender
case. At bottom of the 3 1/2 deep hole, I expected to see a slotted or
philips screw or an allen wrench opening. Did not see either instead saw
a flat surface. Tried pushing on the flat surface while trying to
loosen the case. Pressing did not help loosen the case.
Still cannot quite understand how to part the 2 case halves.
Still can use hints, thanks, Dave_s
8/1/2011 7:32 AM, Dave_s wrote:
Something like this unless you just happen to find somebody who has the
identical unit is the place where posting photo on one of the hosting
sites is going to be invaluable...
Or at least if you can find a parts diagram that _might_ help...
Pretty common to hide the screws under the rubber feet. A shot of
contact cleaner/ lubricant will often free up the switches. Follow up
with some electrical contact grease. I used to use some called "Green
Stuff" dont know if its still around or not. I bought a 1/2 pint can
of it back in the '70s....didnt know it was going to be a lifetime
Can you clarify my questions about your very good suggestion?
The case is still closed. I cannot part the case to get internal access
to the push button switches. Sounds like you are suggesting I apply the
grease or WD40 or thin lubricant onto the exposed external switch
buttons and let liquid run into insides through the gap between button
and sheet metal.
Applied hot water (no soap) onto the switch buttons. This did free a
few of the buttons a bit.
By working the actual white buttons, pulling each button up, all buttons
up, the buttons can then be moved a quite bit more. The buttons behave
like they are internally sticky and prefer to stay in down position. I
push one down and it pops up nearby down button but it stays down and
must be wiggled while trying to pop it up by pushing down a nearby button.
Not sure how to get that " electrical contact grease "
into the internal switches when case is closed. Apply to external buttons?
Jammed because they will not move? Perhaps something was spilled on the
buttons and they are sticky? My usual remedy would be to flush the
buttons with hot water and set the mixer outside to dry in the sun. That
what I do with computer keyboards at work.
I used to have one of these (actually a couple) but I finally gave
them away YEARS ago.
My recollection is that unit operated by pushing down any single
button at a time.
The unit was turned off by pushing the off button.
The problem happens if more than one button was pushed at a time.
Give this a try.....gently pry off all the plastic buttons to expose
the metal switch posts.
Gently grip each post in turn and pull up on it sightly. Each time you
pull up on a post, gently push down on the "off button" post.
If you continue to work the switch posts,
I believe you will be able to return the switch to its "normal" state;
all posts up & the "off button" post down.
My recollection is that the switch can be teased back to working
without taking the case apart.
I suspect it's either gummed up or there's a return spring for the
latching mechanism which has broken / come loose (or the mechanism is
simply worn, but these kind of switch setups normally take a *lot* of use
before that happens). Either way, you're better off finding a way inside
Looking at the photos, some other possibilities for access are screws
hidden under the black covering around the switches (it's possible this
was stuck down after factory assembly and test), or somehow via the white
bezel below the jug (if this unscrews or unclips somehow).
Can't you get a flashlight in to see if there are fixings normally hidden
by the feet (Or use a digital camera in macro mode)?
On Monday, August 1, 2011 10:32:35 AM UTC-4, Dave_s wrote:
e the 7 push buttons are all jammed. Blender has been sitting on my shelf u
nused for several years.Since no parts are available, I want to disassemble
the case to try to free those switches. I do not know the type of tool, if
any, needed to release the two plastic case parts.Hamilton Beach did not l
et me talk to someone for assistance.Thanks for any helpful hints.Dave_s
although an old post , I have A HB mopdel 748, bascially same unit with sam
e knid of switch and smae problem. the four screws shown in th pic will sep
arate the case. The switch comes out by lifting silk screen over buttons, t
here will be a screw at each end by screws
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