are you kidding?
Shimano disc brakes, from parts to fitted filled and bled in about 30 mins – and I’m no mechanical genius. I’ve said before and I’ll say again – disc brakes are to me the top level of perceived vs actual difficulty ratio.
Mosey – Go bottom up. Get a syringe from the chemist and a bit of washer hose as said from Halfords when you get the LHM oil.
Once you’ve cut and refitted the hoses (new olive, etc.)
0. Put kettle on and make a cup of tea.
1. Fit a bit of hose to the bleed nipple other end to a small bag or wad of tissue even. 1 min.
2. Turn the lever so the reservoir is horizontal. Remove reservoir cap and diapragm (don’t lose the screws!) 2 mins, mainly to find a right sized screwdriver.
3. open bleed nipple 1/4 turn and pump brake lever like billy-o to pump the old fluid out. 2 mins.
4. Get a new bit of hose. Put on the end of the syringe and fill with oil and do the nursey thing to make sure there’s no air in. 1 min
5. Put this on the bleed nipple instead of the waste hose. 1 min
6. Push the oil in gently, back up the tube taking all the bubbles up with it (air rises, right?) until it starts to fill the reservoir. 3 mins.
7. Go slowly to fill the reservoir to the brim. Use a bit of tissue to skim off the top bit, in case any crud has come up with it. Rebrim it, from either end, it doesn’t matter and then gently replace the diaphragm and reservoir cap, using tissue to catch the overflow. 2 mins.
8. Drink tea which is now at optimal drinking temperature.