$1200 drive in - drive out. From memory, they told me that there was a risk of damaging the solenoid (i. e. rendering the valve unit useless), but I was happy to take the risk.Quote:
Originally Posted by benrover
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$1200 drive in - drive out. From memory, they told me that there was a risk of damaging the solenoid (i. e. rendering the valve unit useless), but I was happy to take the risk.Quote:
Originally Posted by benrover
Thanks for all your help people, I'll be pulling the unit apart this afternoon, and will find out whats happening.. if you interested keep checking back I'll post some photos of what I find.
To sum up, when my pump turns on it's dead quite, can only tell it's on with a hand on the unit, I have since watched few youtube vids of a power bleed, what a difference in noise - something sus there!
According to this PDF I found (hummers have the same unit) Dropbox - absmod.pdf - it shows there is an off-centred bearing that depresses some "plungers" while rotating in the pump body I suspect that this bearing is either missing (maybe from factory), fallen apart or the shaft has sheared, as there is no pressure in in the brakes from TC no kicking from ABS and no pump noise, I wouldn't expect both "plunger" seals to fail at the same time and even then there would still be some audible noise from the module if they were being contacted by the bearing.
Does this sound like a reasonable assumption and possible cause of my issue?
Also just a heads up I found a post claiming the OP fitted a D2 modulator to his defender - the d2 unit has different ports but he just tried connect it as if it was a defender unit and it works perfectly each wheel being braked correctly see the post for more info, he posted back a year later saying he's had no issues to date - Land Rover Defender TD5 ABS Modulator | LandyZone - Land Rover Forum
Thanks for the help people!
Just watched some power bleeds online - wow what a noise.. after reading this PDF Dropbox - absmod.pdf where you can see the pumps guts. I think the bearing that contacts the "plungers" has fallen apart or was never there.. 😂 which in turn causes a pressure problem.
Anyone know the bearing size?
The next joy you are going to have is getting it out of the car
It is possible you can take it out the top but it is difficult
Are you talking about the motor of the entire unit? I might leave it until next week when I have more time if thats the case! How many hours on the spanners? I guessed like 2 to get it off and back on with a new pump.Quote:
Originally Posted by djam1
Also found a S/H D2 unit for $330, is that a decent price? According to this post Land Rover Defender TD5 ABS Modulator | LandyZone - Land Rover Forum you can just fit it straight to the defender even thought the ports are miss matched. OP reports back a year later with the all clear since the mod.
Would take me a lot longer than 2 hours maybe you are just quicker than me
I'm not expert or speed demon, I like a good job and try not to rush anything. What would you expect the job to take? I might am probably miss estimating the job!Quote:
Originally Posted by djam1
It would take me 3 or 4 to get it out and make the repair but I am a bit slow
Quote:
Originally Posted by benrover
So I finally got around to pulling out the ABS unit..
As for the diagnosis, the plungers that are meant to act as pumps have seized and will not come out so the pump was not contacting them and therefore not building up enough pressure in the line to close the callipers during a TC event.
Getting a second hand D2 unit as they can be bolted directly in place of the defender one. So within a few days the problem should be sorted and everything back together working!
Does anyone know how to bleed the breaks without a nanocom and ABS?
How To:
- Undo and zip tie the lines out of the way being careful not to bend them.
- Undo the plugs, and other two feeds on the ABS unit
- Undo the nut below the grey plug on the from of the unit with a bit of backwards tilt and forward force you can get it out.
Attachment 142945
4. Undo clip that grey from the holder bracket and then also seperate the plug.
Attachment 142941
5. Turn the unit towards you so the right side is facing up.
Attachment 142942
6. Then just a bit of playing with it to get it out like so
Attachment 142946
Its out
Attachment 142940
Here is the problem - No plungers (don't know there technical name) but they are either suck inside the unit or ground off by the seized bearing.
Attachment 142943Attachment 142944
Hope this helps someone
Cheers for all the help from everyone.