Shimano 105 pedals
Comments
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Take them off the cranks (big allen key / bit from the back of the crank, make sure you turn the right way) Good opportunity to grease the threads prior to reassembly.
Then you'll need the Shimano service tool TL-PD40 to unscrew the innards (couple of quid; Google it)
Have a look on Shimano Tech Docs for an exploded diagram of what to expect inside.
http://techdocs.shimano.com/media/techd ... 608602.pdf
Flush out with a bit of WD40, and assuming nothing's disintegrated, replace everything packing with fresh grease as you go.0