How can I repair the Braun series 7 shaver head? A small plastic piece fell off.

I have used one of these for over 10 years, and never had it leak shavings unless I am shaving the top of my head after shaving my face. You say you regularly use the cleaning station. It needs cleaning of shavings after every use. I remove the head and tap the shaver and head over the sink after every shave. About every two weeks, I rinse the foil and clean the cutter and shaver top with an old toothbrush and soapy water and leave it to dry.

You will need to disassemble the shaver to see if it can simply be put back in place of if parts need replacing.
Braun Series 7 Shaver Disassembly Tutorial

See link below for schematic

http://www.smallappliance.com/images/SmallAppliance/English/products/standard/7526-Schematic.pdf

are you talking about springs under the center cutter bar between the foils? If so, you will need a new foil and cutter set. It is available at shaveroutlet.com with link below

http://shaveroutlet.com/braun-8000-series-360-complete-foil-and-cutter-p-143.html

Or maybe you refer to a spring that goes to one of the clips that hold the foil assembly to the pivoting swivel frame. If so, you will need the part linked below

http://shaveroutlet.com/braun-8000-series-activator-motor-drive-unit-p-36.html

Yes, these are NiMH AA 1.2V flat top batteries. Replacements can be found on some battery websites (like onlybatteries.com). I'd get the 2200mAh rated ones, as they'll hold a longer charge than the 1650mAh ones. You will need two of them (the shaver has a 2.4V motor). This works for most Braun shaver models from 6000 to 8000.

The one piece motor drive which also contains the shaver head in the Braun wear out. They can be replaced by yourself or a shaver tech. A good place for parts, http://shaveroutlet.com/.

To disassemble the 7000 Series Braun shaver.

Disassembly of the 7000 Braun shaver is basically the same as the 8000 series Braun shaver listed below. The 7000 is actually easier to disassemble as the plastic is much thicker and the bottom socket cover pops right off as there are less tabs and they are bigger.

To disassemble the 8000 Braun Series shaver.

Remove the plastic cover on the bottom that covers the corded socket. Be careful, there are a total of two tabs on the short sides and four very small tabs on the long sides. I usedmy fingernail to create a space big enough to insert the corner of a credit card in the center of the long side opposite the blue light indicator, then gently removed the cover. Using a screwdriver could damage the plastic.

The two sides then pop off, they only fit on their respective side when replacing. Don't lose the two small black seals on the top of each side piece.

There are a total of four screws holding the body together. Remove the screws, using the proper flat blade or torx screwdriver. The shaver will then split into. You can then remove the the Motor Drive Unit and the separate circuit board with the batteries.

This would also be a good time to clean the goo buildup from around the shaver head.

Assembly is the reverse of above. The Motor Unit will only fit in one way, there is a flat side and a angular side. Be sure the pin for the trimmer is placed in its proper hole, or it won't extend.

Look at the bottom of the shaver where the AC cord plugs in. Carefully pry the small black piece of plastic out of the base. Once you have this out, the two chrome side pieces will fall off, and you can split the shaver in half to expose its inner workings.

This button wears out or just fails with time, but is replaceable.

Braun 7526 Syncro Body Housing with Trimmer
$12.99, Fits Model: 7526, Type: 5493, Includes back case, front case with trimmer/switch, side grips and bottom 'plug', http://shaveroutlet.com/.

To disassemble the 7000 Series Braun shaver.

Disassembly of the 7000 Braun shaver is basically the same as the 8000 series Braun shaver listed below. The 7000 is actually easier to disassemble as the plastic is much thicker and the bottom socket cover pops right off as there are less tabs and they are bigger.

To disassemble the 8000 Braun Series shaver.

Remove the plastic cover on the bottom that covers the corded socket. Be careful, there are a total of two tabs on the short sides and four very small tabs on the long sides. I usedmy fingernail to create a space big enough to insert the corner of a credit card in the center of the long side opposite the blue light indicator, then gently removed the cover. Using a screwdriver could damage the plastic.

The two sides then pop off, they only fit on their respective side when replacing. Don't lose the two small black seals on the top of each side piece.

There are a total of four screws holding the body together. Remove the screws, using the proper flat blade or torx screwdriver. The shaver will then split into. You can then remove the the Motor Drive Unit and the separate circuit board with the batteries.

This would also be a good time to clean the goo buildup from around the shaver head.

Assembly is the reverse of above. The Motor Unit will only fit in one way, there is a flat side and a angular side. Be sure the pin for the trimmer is placed in its proper hole, or it won't extend.