Jump to content
SAU Community

Recommended Posts

Hi all,

Like many others I had an ABS unit that was leaking and did not want to put another 15+ year old unit on that wasn't leaking yet but was going to, probably 2 minuts after I had paid $400 for it.

Having looked around here on the forums it seemed no one had ever tried to repair one. Since I have a background in brake cylinder resleeving, I had been given many odd things to rebuild and repair because they were either too old or expensive to buy new.

I decided to try to repair mine. What was I going to lose? - I already needed a new one !!!

Anyway, I pulled the thing apart right down to nothing to find the internals all in good condition mainly because they are all made from aluminum and therefore doesn't rust or pit easily. Just the seals had gone hard.

So I tracked down a company that sells EPDM seals (the only material that holds up to brake fluid) and we went about matching them all up (about 36 of them). We found all except one and I started the reassembly.

All went well. Four hours went past and I was refitting the unit to my car, bled the system through and hey presto - Job's a goodin.

The unit has now been back on the car for a few days and all seems to good. Brakes work as new and abs funtion is perfect with no leaks .

Any-one that has some mechanical knowledge and the right tools should be able to do this without too much hassle.

I will keep this updated if any problems arise or if any one wants some help doing there own.

GIVE IT A GO! WHAT DO YOU HAVE TO LOSE? MY UNIT IS NOW AS NEW, NOT SECOND HAND.

Link to comment
https://www.sau.com.au/forums/topic/228596-abs-unit-i-rebuilt-it/
Share on other sites

Basic tools ie spanners allen keys etc all the normal stuff if you play with cars , nothing exotic

Seals cost me about $75.00 plus some brake fliud got them from a company called Trans seals

If you pull one side of it apart at a time you will always have a referance to look at if you get confused, just take your time and keep things clean .

Ok for those that want to give it ago the company i got the seals from

Trans seals Pty Ltd www.transeals.com.au

1 Atlas court Welshpool WA 6986

08 9458 5766

You will need

number required

2 O-Ring 1.864 x0.070" EPDM-70

2 O-Ring 0.364 x 0.070" EPDM-70

2 O-Ring 0.489 x 0.070" EPDM-70

2 O-Ring 0.612 x 0.103" EPDM-70

2 O-Ring 0.424 x 0.103" EPDM-70

2 O-Ring 0.426 x 0.070" EPDM-70

3 O-Ring 0.609 x 0.103" EPDM-70

3 O-Ring 0.864 x 0.070" EPDM-70

3 O-Ring 0.143 x 0.103" EPDM-70

15 O-Ring 0.176 x 0.070" EPDM-70

2 O-Ring 0.676 x 0.070" EPDM -70

2 O-Ring 0.987 x 0103" EPDM-70

Some PBR rubber grease Available from Repco or the like

Next time i do one i will take photos and do a how to page , until then I'am happy to answer questions .

  • 1 month later...
  • 5 months later...

Nice work!!

Mines always had a very minor leak & didnt want the risk of a 2nd hand unit.

Did you bleed the entire system again once changed or just the nipples on hte ABS unit?

Glad the seals r in Perth, was expecting them to be over east :D have printed out your list. thanks

Mike

2 O-Ring 1.864 x0.070" EPDM-70

2 O-Ring 0.364 x 0.070" EPDM-70

2 O-Ring 0.489 x 0.070" EPDM-70

2 O-Ring 0.612 x 0.103" EPDM-70

2 O-Ring 0.424 x 0.103" EPDM-70

2 O-Ring 0.426 x 0.070" EPDM-70

3 O-Ring 0.609 x 0.103" EPDM-70

3 O-Ring 0.864 x 0.070" EPDM-70

3 O-Ring 0.143 x 0.103" EPDM-70

15 O-Ring 0.176 x 0.070" EPDM-70

2 O-Ring 0.676 x 0.070" EPDM -70

2 O-Ring 0.987 x 0103" EPDM-70

Good work. With one exception, I can give the direct reference number, which is much easier for suppliers to work with.

You mention in the first post that one o-ring could not be found. Do you have the dimensions as there might be something available that will be close enough to do the job ??.

  • 7 months later...
Good work. With one exception, I can give the direct reference number, which is much easier for suppliers to work with.

You mention in the first post that one o-ring could not be found. Do you have the dimensions as there might be something available that will be close enough to do the job ??.

Will be doing this in the near future,just ordered the o-rings,will post pics when done.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Probably too late to reply to this, but worth a try. It's not calliper flex, the calliper as a whole is moving so it has to be calliper mounting bracket flex.  Calliper mounting brackets are designed to stop the calliper rotating, they don't need to be designed heavy duty to stop the calliper moving in and out.  Whatever it is is not the major cause of poor pedal feel, the outer pistons are moving towards the disc rotor the same amount as the inner pistons are moving away from the disc rotor.  Hence no change in fluid usage, what extra fluid is needed to move the outer pistons is recovered from the inner pistons. For a calliper to move as a whole by far the most common reason is the rotor is not perfectly centred in the calliper.  The first thing I check is that hub face is perfectly clean, bare metal, where the rotor hats contacts it.  Then I check the that rotor is firmly held in place by at least 3 wheel nuts (or equivalent). If all of the above are confirmed to be in perfect alignment then I would check the piston sizes and ensure that the 3 inner pistons and 3 outer pistons have matching diameters (eg; 28/32/36mm).  I have seen a no name 4 spot calliper that had 1 of the 4 pistons a different diameter. Maybe I missed it, are both the callipers exhibiting the same problem? I would remove the transfer pipe and inspect it to make sure that there are no restrictions. Maybe you already have but if not I would return them with the video and have them confirm all of the above.   Hope that helps Cheers Gary    
    • If you have the original log book and it didn't have a chassis number quoted, then no money required.  I have "rechassied" a number of race cars, no problem as long as you have the original log book.   Cheers Gary
    • Well the good news is that it won't run any worse with an atmo bov than it does with no bov, I've owned a few Nissans over the years (r32, s15 and now r33), the stalling issue caused by a bov or no bov while still having an afm is easy enough to live with, most people get used to driving them and just feathering the throttle when you come to a stop to avoid it stalling. Changing to a proper ecu with a map sensor is ideal but in the short term I'd just slap in the bov if you really want the whoosh sound. I looked into the pass through type maf like the R35 one above but decided against it as the amount of oil and crap flowing through the hot side would mean you'd have to clean it often to keep it working.
    • Build an 800hp motor. Make it as bullet proof as you want, you WILL still break things. Like, the rest of the car. Heck, even as a dead stock car, things will still break, but the more power, the more everything else will let go easier. From gearbox gear sets, to extra stress on the chassis/mounts, more stress on diff, axles, tailshaft, even the suspension mounts. Check out the motorsport build that last year went to a Bosch motor sport ABS setup, and now can brake so damn hard it's twisting mounts for suspension/subframe etc. Now if the brakes can do it, imagine what happens with super grippy tyres and 800hp in a low gear...   Shit, I'm presently out fixing the girlfriends daily driver that rarely sees past 3,000rpm and is used to cart the dogs around in. Everything WILL break. If you don't want it to break, don't drive it. And then laugh, as it will still break without even being driven!
×
×
  • Create New...