Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take part in the Newton-Rider International Giveaway for a Foldable Bicycle Helmet


Nightmare 1st Time Brake Bleed
#1
Hey guys, yep, as the title suggests I totally screwed up my first attempt at hydraulic disc brake bleeding on my Magura Louise 2007 brakes! Once both syringes had mineral oil in them I wasn't sure how to remove them without the oil spilling out. I got it wrong and ended up losing a lot of my oil from the system. Now it's all back together again there's virtually no power in the front brake due to lack of mineral oil! I'm going to go through the process again tomorrow to try to sort it out, so wish me luck fellas! Why must we make such dreadful mistakes to be able to learn eh??!!! Si
  Reply
#2
[attachment=2344]
(04-26-2011, 08:05 PM)Dalton2250 Wrote:  Hey guys, yep, as the title suggests I totally screwed up my first attempt at hydraulic disc brake bleeding on my Magura Louise 2007 brakes! Once both syringes had mineral oil in them I wasn't sure how to remove them without the oil spilling out. I got it wrong and ended up losing a lot of my oil from the system. Now it's all back together again there's virtually no power in the front brake due to lack of mineral oil! I'm going to go through the process again tomorrow to try to sort it out, so wish me luck fellas! Why must we make such dreadful mistakes to be able to learn eh??!!! Si

The easiest way I have found to bleed the brakes is to flush the system through first this gets rid of any muck in the tube and caliper, flush it both ways from top to bottom then bottom to top. once you've done that slacken the bleed nipple on the caliper and gently fill the reservoir. replace the lid on the reservoir and pull the brake lever once brake fluid shoild exit the bleed nipple. put an elastic band round the lever and tighten the bleed nipple then release the lever. make sure nipple and reservoir lid are tight this should cure the problem.
  Reply
#3
(05-10-2011, 04:02 AM)The Bike Doctor Wrote:  
(04-26-2011, 08:05 PM)Dalton2250 Wrote:  Hey guys, yep, as the title suggests I totally screwed up my first attempt at hydraulic disc brake bleeding on my Magura Louise 2007 brakes! Once both syringes had mineral oil in them I wasn't sure how to remove them without the oil spilling out. I got it wrong and ended up losing a lot of my oil from the system. Now it's all back together again there's virtually no power in the front brake due to lack of mineral oil! I'm going to go through the process again tomorrow to try to sort it out, so wish me luck fellas! Why must we make such dreadful mistakes to be able to learn eh??!!! Si

The easiest way I have found to bleed the brakes is to flush the system through first this gets rid of any muck in the tube and caliper, flush it both ways from top to bottom then bottom to top. once you've done that slacken the bleed nipple on the caliper and gently fill the reservoir. replace the lid on the reservoir and pull the brake lever once brake fluid shoild exit the bleed nipple. put an elastic band round the lever and tighten the bleed nipple then release the lever. make sure nipple and reservoir lid are tight this should cure the problem.

Hiya mate

Thanks for the advice.

When you say 'flush the system', what am I flushing it with? You mean just with clean mineral oil?

I'll try what you said. No garauntees I'll be able to get it right though!!

Cheers

Si
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
11,410
11-06-2014, 08:59 AM
Last Post: JanJ
 
4,796
10-20-2014, 04:52 PM
Last Post: DaveM
 
4,823
01-13-2012, 10:06 AM
Last Post: Bill
 
12,425
11-08-2011, 06:59 PM
Last Post: Terryg
 
11,626
07-28-2011, 01:47 AM
Last Post: Avua

Forum Jump:

[-]
10 Latest Posts
Newton-Rider, a helmet like no other
01-15-2021 05:01 PM
Colnago R41 Handlebar
01-14-2021 10:24 PM
How much do you bike per year?
01-14-2021 04:50 PM
BMX Shoes
01-14-2021 04:42 PM
Colnago C64 setup advice
01-14-2021 04:26 PM
Do you wave to other cyclists?
01-14-2021 01:12 PM
1983 Trek 720
01-13-2021 10:30 AM
Riding all day on the winter solstice
01-13-2021 07:43 AM
NewBikeShopper (intro & opinion request)
01-12-2021 09:11 PM
TREK FX 3 vs Specialized Sirrus 3.0
01-12-2021 03:05 PM

[-]
Top 5 Posters This Month
no avatar 1. Criminal
20 posts
no avatar 2. Zviedrs
6 posts
no avatar 3. RollOn
5 posts
no avatar 4. Yevhen
5 posts
no avatar 5. NewBikeShopper
4 posts