Brumby brake peddle moves 70% before brakes bite
- El_Freddo
- Master Member
- Posts: 12506
- Joined: Tue Oct 04, 2005 10:00 am
- Location: Bridgewater Vic
- Contact:
Brumby brake peddle moves 70% before brakes bite
Hey guys,
Sunnie the brumby is on the road. One problem I really want to iron out ASAP is that the brake peddle still moves too far down before the brakes work - probabily near 70% peddle movement til the brakes start biting properly. If you pump once they bite where you would expect them to - somewhere near 30% peddle movement.
We've bled the brakes, got a little bit of air outta the rear but still no change. When you use the brakes you can feel where it should bite but it keeps going further - it feels like there's something there thats just starting to pressurise up then it lets go and you end up at the 70% mark.
The brakes work really well, its just the peddle movement that i'm not happy with. Could this be the master cylinder needing an overhaul or the booster?
Can an L series master cylinder and brake booster replace a MY setup? - I've got a parts car at home that has all these bits and it would be the easiest option atm.
Crossbred kit is not an option - $$$ we don't have for a standard EA81
Any info welcome.
Cheers
Bennie
Sunnie the brumby is on the road. One problem I really want to iron out ASAP is that the brake peddle still moves too far down before the brakes work - probabily near 70% peddle movement til the brakes start biting properly. If you pump once they bite where you would expect them to - somewhere near 30% peddle movement.
We've bled the brakes, got a little bit of air outta the rear but still no change. When you use the brakes you can feel where it should bite but it keeps going further - it feels like there's something there thats just starting to pressurise up then it lets go and you end up at the 70% mark.
The brakes work really well, its just the peddle movement that i'm not happy with. Could this be the master cylinder needing an overhaul or the booster?
Can an L series master cylinder and brake booster replace a MY setup? - I've got a parts car at home that has all these bits and it would be the easiest option atm.
Crossbred kit is not an option - $$$ we don't have for a standard EA81
Any info welcome.
Cheers
Bennie
Check that the one-way valve in the vacuum line off your brake booster is working properly (I think you probably have one on a Brumby??).
The booster itself could need replacing. I'm not sure how to test one other than swapping it for a known good one.
The is most likely more air in the system. Sometimes there can be an airlock in the master cylinder. You can sometimes fix this by taking it off and manually pooring fluid into the bore and refitting. Sometimes Subaru's require a LOT of bleeding before all the air comes out.
I believe an L series booster and master cylinder can be a replacement. In fact I also believe a few people have upgraded to Liberty units with relative ease (Subarino and Matatak for instance)
The booster itself could need replacing. I'm not sure how to test one other than swapping it for a known good one.
The is most likely more air in the system. Sometimes there can be an airlock in the master cylinder. You can sometimes fix this by taking it off and manually pooring fluid into the bore and refitting. Sometimes Subaru's require a LOT of bleeding before all the air comes out.
I believe an L series booster and master cylinder can be a replacement. In fact I also believe a few people have upgraded to Liberty units with relative ease (Subarino and Matatak for instance)
EZ30 L series - Monsterwagon
https://www.ausubaru.com.au/viewtopic.php?f=71&t=26163
https://www.ausubaru.com.au/viewtopic.php?f=71&t=26163
- AlpineRaven
- Senior Member
- Posts: 3682
- Joined: Wed Oct 19, 2005 10:00 am
- Location: Melbourne, Victoria, Australia.
Could be three things I could tell you -
Air in the lines that is "stuck" inside the joints
Master Cylinder on its way out
Calipers on its way as well
Cheers
Tristan
EDIT: check if the lines are rusty or not?
Air in the lines that is "stuck" inside the joints
Master Cylinder on its way out
Calipers on its way as well
Cheers
Tristan
EDIT: check if the lines are rusty or not?
Subarus that I have/had:
1995 Liberty "Rallye" - 5MT AWD, LSD - *written off 25/8/06 in towing accident.
1996 Liberty Wagon - SkiFX AWD 5MT D/R, Lifted.. Outback Sway Bar, 1.59:1 Low Gearing see thread: 1.59:1 in EJ Box Page
Sold at 385,000kms in July 2011.
2007 Liberty BP Wagon, 2.5i automatic
1995 Liberty "Rallye" - 5MT AWD, LSD - *written off 25/8/06 in towing accident.
1996 Liberty Wagon - SkiFX AWD 5MT D/R, Lifted.. Outback Sway Bar, 1.59:1 Low Gearing see thread: 1.59:1 in EJ Box Page
Sold at 385,000kms in July 2011.
2007 Liberty BP Wagon, 2.5i automatic
- El_Freddo
- Master Member
- Posts: 12506
- Joined: Tue Oct 04, 2005 10:00 am
- Location: Bridgewater Vic
- Contact:
While looking for another thread I came across this old dig ^
Thought I might update what I found and what was done.
Basically the rear brake shoes were completely worn out and no one had adjusted them.
Since Ruby Scoo had the rear discs I shoved her old self adjusting shoe setup, including the backing plate onto the rear of Sunnie the Brumby. After bleeding and some adjusting Sunnie the Brumby is stopping awesome now!
I should probably look at the rear shoe's meat as I remember them being low when I put them on...
Cheers
Bennie
Thought I might update what I found and what was done.
Basically the rear brake shoes were completely worn out and no one had adjusted them.
Since Ruby Scoo had the rear discs I shoved her old self adjusting shoe setup, including the backing plate onto the rear of Sunnie the Brumby. After bleeding and some adjusting Sunnie the Brumby is stopping awesome now!
I should probably look at the rear shoe's meat as I remember them being low when I put them on...
Cheers
Bennie
Even though you've fixed the problem. I'll throw in what I've found. Like Andrew T said Subarus can be a pain the bum to bleed properly. I've had 3 l series do it to me now. Bled them from the master cylinder etc properly and still a crappy pedal. Even threw another master cylinder on and adjusted the rear shoes still no change. I ended up clamping all the lines and getting a ripper hard pedal and took them off one by one after bleeding through and it seemed to work..
[SIGPIC][/SIGPIC]
- El_Freddo
- Master Member
- Posts: 12506
- Joined: Tue Oct 04, 2005 10:00 am
- Location: Bridgewater Vic
- Contact:
So you didn't read the whole thread then or my latest update?rubisubi wrote:Id bet its your rear brake cylinders, 40 bucks each, mine got so bad the brake pedal was nearly to the floor. Any water or mud and they soak them in quite easily, a weak design and quite poor considering it should be suitable for 4wdriving.
Job's done, the rear drums were replaced with a set from the L series that are self-adjusting. They go really well compared to what they used to be!
Cheers
Bennie