Abs Unit I Rebuilt It !

[Rthirty2GTR]

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.

[some_cs_student]

Might be better in the tutorials section?

[ThirtyThree]

hey mate how did you identify it was the seals and not anything else?

apparently the modules on the back of the unit go alot to?

[Rthirty2GTR]

the fluid coming out was the daed give away.

[G0DZLR]

shouldv made a step-by-step account with photos etc and posted it in the DIY section. youl get praised much

[benm]

What sorta tools are needed? (ie basic tools or specialised brake tools?)

How much were the seals?

Where can I buy them from?

[Rthirty2GTR]

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 .

[funkymonkey]

could you post up a list of parts (maybe scan the invoice) and contact details for the company?

[Rthirty2GTR]

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 .

[benm]

That's umm.... a lot of o-rings!

[Rthirty2GTR]

I thought that you may as well do them all not just the leaking ones , after all they have all been there the same amount of time.

[Ronin 09]

brilliant work mate.

saved yourself some $$

[scottrichards]

My abs is in desperate need of a fixing. Not sure if it would be the same as yours though. Mine's from a 1989 cefiro, rb20DET. The part number on my unit is 47600-71L00.

Also, how did you bleed it through?

[Beer Baron]

nice one mate. Good to see people not afraid to have a crack at some DIY.

[SLIPPERY]

are you in perth by any chance?

[Mike__]

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 have printed out your list. thanks

Mike

[Rthirty2GTR]

I flushed the hole system through starting at the master cyl then the abs unit then the wheels ,

make sure you clean ALL the shitty fluid out!!!!

Have fun it takes siome time but saves some $$$

[Mike__]

thanx

[SteveL]

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 ??.

[YLD-CHLD]

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.