Saturday, 6 June 2020

Put new Magura hydraulic brakes front and rear onto MTB.

Drizzly weather. Took bike into kitchen.

Took off old hayes so1e brakes.
Brakes totally not working. Bleed plugs & reservoirs damaged.

New Magura hydraulic brakes.
From ROSE bikes in Germany. https://www.rosebikes.com/
Magura QM 12 disc brake adapter: 7,75 €
Magura MT5 Disc Brake Set Front+ Back Wheels: 149,77 €
Shipping costs: 9,95 €

Total: 167,47 €

Put on new magura brakes.

Rear: caliper adapter attached first (RED bolt up, BLUE bolt down).
(a bit like Alice in Wonderland or the Matrix)
Remove brake spacers and fit on caliper.
Bolt lightly in place, then squeeze lever to centre caliper on rotor and tighten bolts.
(didn't cop this until a bit later)
Route cable to front of bike.

Front: caliper fits on directly.
Route cable.

Phew. Relieved the adapter was right and the front fitted without adapter. On the old rotors too.

Puzzled over which side to put levers on!
The brake instructions say put front brakes on left . . huh? Oh. Germany is like America/rest of world.
UK, Ireland, ?Aus?Can front brakes go on right.
Daire's bike has them on left!
All other bikes in house have them the other way round.
The front calipers on Fionn's and Kate's bikes look like they want to be the other way though!
Anyway.
Front brake lever on right.
Rear brake lever on left.

Cut hoses - a bit fiddly.
Measured to not have too much unnecessary hose flopping around but have enough if need to move lever to vertical. Cut with pliers. Hard to get hose inset to press in. Keep that piece vertical while remove rubber sheath, then 8mm wrench unscrew, then pull out hose. Sheath, screw piece and olive on hose. Push in and screw back firmly in place (the olive deforms to make seal). Oh awkward, when tightening the hose twists. So it has a sort of a twist kink that is hard to eliminate.

Pretty straight-forward but fluid tends to leak/escape a bit.

from Magura showing cut hose method: https://www.youtube.com/watch?v=xsSdFO89_rU
  [retrospectively: Ohhhhh. Nice. the spacers can hold the hose for pushing in the hose inset.]
  [also nice plugs 2 olives 2 hose insets came with each brake set]
Some American guy showing method . . . https://www.youtube.com/watch?v=tLLZrf_mJi8

Rear brake worked grand straight off.
Quick lever bleed for front brake.
Put lever straight, plug screw off, syringe in.
Depress and release syringe and a satisfactory amount of bubbles come up.
Repeat, work lever, tap brake cable.
Remove syringe and replace plug screw and clean afterwards.
Magura fast bleed (from Magura): https://www.youtube.com/watch?v=RtqwQB8wtYQ

Quick test, very late/early tomorrow now!! Ouch.
Job done. New brakes on. Looks good.

Old brakes and cut off hose

Rear caliper. (and adapter)

Front caliper.

Brake levers and cables at front.



Full brake bleed . . for another day:
Magura brake bleeding (from Magura): https://www.youtube.com/watch?v=GMRk916qJTg
Myeh. Annoying. Remove caliper, remove pads, in spacer. Keep caliper same height as 
Similar method from magura, authentic German mechanic: https://www.youtube.com/watch?v=bpstjYqLehI&t=401s

Park tool Magura Hydraulic brake bleeding:  
Wow. Kinda messy.
At least caliper left in place.


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