Here you find the stripdown of my FWB601. In general the FWB603 stripdown is the same. There is a difference in the trigger mechanism and seals. When I perform the next FWB603 maintenance, I will be updating these pictures.
Only use
'Feinwerkbau
Spezial Gleitfett'
for greasing.
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I added some pointers and instructions with the pictures below.
Click on a picture.