Wild Dog Adventure Riding

Technical Section => Make / Model Specific Discussions => BMW 1100/1150/ADV => Topic started by: Giepie on June 11, 2018, 03:36:19 pm

Title: ABSIII, Servo Brakes problem.
Post by: Giepie on June 11, 2018, 03:36:19 pm
On my pig I've got the ABSIII system with servo brakes.  It seems the rear brakes' motor stopped working.  Front is still fine, but the rear brakes is non existent when the bike is on.  As soon as I use the rear brakes or pull the front brakes hard both brake lights on the display starts flashng.  I want to disconnect the ABS unit and later bypass/remove it completely.  When the ignition is not on, it seems that the rear brakes work fine.

The options I'm considering are:
1. Unplug the ABS unit, but keep the present hoses and pipes.
2. Bypass only the rear brakes, plug the pipes to and from the ABS unit.

Any body did something like this?

To service the unit will cost about R8000, and so far it seems its oly in PE and the complete bike must be there.
Title: Re: ABSIII, Servo Brakes problem.
Post by: SmuGS on June 11, 2018, 04:43:44 pm
I had the exact same problem with my bike with the rear brake not working. The problem is a sensor inside the pump which packs up. I was later told this by Jughead who I donated my old pump to for spares. Instead of repairing the pump, I opted for removing it completely. If you are handy with spanners and wires, it's not a big job and costs absolutely nothing except a bit of electrical tape and a few crimp connectors for the relay. You simply re-plumb the brake pipes, splice a few wires and re-use the ABS relay to operate the brake light and that's it..

Link on how to do it here

http://www.ukgser.com/forums/showthread.php/232002-Simple-NO-COST-servo-removal-of-1150-IABS-system
Title: Re: ABSIII, Servo Brakes problem.
Post by: SmuGS on June 11, 2018, 04:50:20 pm
Also if you unplug the ABS unit, you will have no brakes at all. Bypassing only the rear brakes might work but I'm pretty sure you will have the brake warning lights flash all the time. The ABS unit is pretty complex as it is also wired to the wheel speed sensors and activates the brake light.
Title: Re: ABSIII, Servo Brakes problem.
Post by: Giepie on June 11, 2018, 05:06:31 pm
Thanks SmuGS.  Much appreciated.  It was Jughead that I contacted.  I can do some work on a bike with spanners etc, so will go this way.  I don't care about losing tha ABS, as it often give a fright when I'm braking on a bad road.  What I'm going to miss is die "power" brakes.
Title: Re: ABSIII, Servo Brakes problem.
Post by: billy-joe on June 11, 2018, 05:17:30 pm
I am battling with my servo brakes too and am hoping to remove the servo/abs system this week.  will let you know how i go.  hoping to do it according to this

http://jpramondon.blogspot.com/2010/05/abs-removal-epilogue-hopefully.html

Seems you just remove the servo module and leave its computer behind. ..
Title: Re: ABSIII, Servo Brakes problem.
Post by: SmuGS on June 11, 2018, 07:35:41 pm
Thanks SmuGS.  Much appreciated.  It was Jughead that I contacted.  I can do some work on a bike with spanners etc, so will go this way.  I don't care about losing tha ABS, as it often give a fright when I'm braking on a bad road.  What I'm going to miss is die "power" brakes.

I was also worried about missing the power brakes but to be honest there is not much of a difference. I could never lock the back wheel even with ABS off but now I can and as for the front, I feel slightly less braking power but I put this down to having the front and back linked. What I do like now is that the braking is not as aggressive as before and has some feel to it. I did like being able so stop the bike with one finger but now at least I don't have to stop and disable the ABS when going on gravel..
Title: Re: ABSIII, Servo Brakes problem.
Post by: masehare on June 11, 2018, 08:02:47 pm
Thanks SmuGS.  Much appreciated.  It was Jughead that I contacted.  I can do some work on a bike with spanners etc, so will go this way.  I don't care about losing tha ABS, as it often give a fright when I'm braking on a bad road.  What I'm going to miss is die "power" brakes.

I was also worried about missing the power brakes but to be honest there is not much of a difference. I could never lock the back wheel even with ABS off but now I can and as for the front, I feel slightly less braking power but I put this down to having the front and back linked. What I do like now is that the braking is not as aggressive as before and has some feel to it. I did like being able so stop the bike with one finger but now at least I don't have to stop and disable the ABS when going on gravel..

...and what does the servo unit weigh? It's quite high up in the bike. I'm pretty sure you'll feel the difference in weight when you remove the servo units.
Title: Re: ABSIII, Servo Brakes problem.
Post by: SmuGS on June 11, 2018, 09:13:54 pm
It's mostly aluminium, two pumps and some electronics and brake fluid reservoirs, I guess 4kg at the most..
Title: Re: ABSIII, Servo Brakes problem.
Post by: Stofdonkie on June 12, 2018, 06:52:48 am
I gutted mine (on the GS) and replaced the lines with braided SS ones salvaged off a crashed GSA.

Easy to service, 100 times better feel and they will last for ever.

(Then promptly sold the bike ... so now the next owner is enjoying them.  ::)  )

Title: Re: ABSIII, Servo Brakes problem.
Post by: Jughead on June 12, 2018, 07:39:14 am
@Giepie , @billy-joe ,  If you guyz want to donate your old buggered pumps in exchange for a few beers or whatever, please drop me a PM.  Thanks!
Title: Re: ABSIII, Servo Brakes problem.
Post by: billy-joe on June 12, 2018, 10:40:44 am
@Giepie , @billy-joe ,  If you guyz want to donate your old buggered pumps in exchange for a few beers or whatever, please drop me a PM.  Thanks!

Iíll keep mine in case the next owner would want to put it back..

Sorry
Title: Re: ABSIII, Servo Brakes problem.
Post by: Jughead on June 12, 2018, 11:04:20 am
@Giepie , @billy-joe ,  If you guyz want to donate your old buggered pumps in exchange for a few beers or whatever, please drop me a PM.  Thanks!

Iíll keep mine in case the next owner would want to put it back..

Sorry

 :thumleft:
Title: Re: ABSIII, Servo Brakes problem.
Post by: volroom on June 14, 2018, 06:43:01 pm
had the servo abs, removed the whole sjebang. But.. you keep the electronic brain of the pump that plugs into the harness. that keeps the tail light working. junk the rest. I also replaced with SS hoses front and back.