Interchangeable Brake Master Cylinder ????

[124cso]

I have been told (by the seller) that the brake master cylinder off a 127 or 128 is the same part as used on a 126. Can anyone authoritively confirm this ?
I have an 86/87 FSM 650 (E?) and no brake parts supplier in this part of the world even has a listing for it.
I have checked everything else and concluded it must be the master cylinder as I ain't got no anchors and no leaks.

Anyone ?

[DEYAN IYI]

Try to find a Lada Niva (VAZ 2121) one. It's the same like older classic Ladas (from VAZ 2101 to 2107) but with L-looking stub pipes. It fits and works for sure, I run the same one (and not only me).



PS- later I'll try to find data about the inner sizes, too be sure that is the same.

[Rusty's Uncle]

You could just get a service kit from the 126fan guys. Cheap to buy and a hell of a lot cheaper to post to New Zealand 

[124cso]

You could just get a service kit from the 126fan guys. Cheap to buy and a hell of a lot cheaper to post to New Zealand 

Thing is that once I pull it out, car is really immobile. IF cylinder bore is o.k., then it is up to 2 weeks for a kit to come thru the post, plus any delay their end. If I have a new one on hand, then just a swap over and bleed job ??

I see my 124 spider cylinder looks the same, same bore too but I assume internals - pistons, springs etc may vary ?? to suit different car weights ?

[DEYAN IYI]

Well, the 126's master cylinder is 19,05mm (3/4"), just like the Lada's (Fiat 124 cloning). So it means that they make the same pressure at the same stroke. You can compare 124 and 126 ones and if they are just the same, use the one you have.

Greathings!

PS - about the Niva was not a joke, as long as there are offroad Niva fans in NZ

[124cso]

Hi Deyan,  You have stirred vauge memories of Highschool Physics lessons !
I think the Nivas were actually quite good off road due to permenant 4WD but got a lot of ridicule. Perhaps better if they had left them more true to the Fiat Campagnola they were copied off ? I had tried a couple out years ago, one fitted with a Corolla diesel and agricultural tires- what a horrid beast plus an as factory one.
Both I found had uncomfortable pedal positions/angles, to me anyway.

I have sent an email inquirey to the eshop so hopefully they won't have too many /mine will be on top, as they are due back tomorrow ?

[Allan]

Have you tried JC or Ant Freeman for these parts?

[Allan]

Further to that it is the same as 125 132 etc. Ask BNT for one for a 125 on which the only difference is the rubber boot on the end. They have 9 in stock at about $45. Where in NZ are you? I'm in Waihi.

[Allan]

Did you get your master cylinder sorted?

[124cso]

Sorted. And yes, a 124/125/lada unit is the same and just bolts in. Found another supplier who had an Italian made Lpr brand one for less than that BNT price.
Interestingly, it was a bit under one quarter of what the local Lada supplier was asking for one sitting on their shelves.
Strange but I tried BNT a few weeks back and they had "nothing listed mate, can you bring in the old one ? "

One thing I found is that these fancy "one man" bleeder set ups do not work (unless the one I bought has a bit (non return valve) missing). The hand pump vacuum ones may be better ?

[Allan]

Brake bleeding is the most simple thing to do. It can also be one of the most frustrating tasks you will ever have to perform. My system is to pump up the pedal and then let the pressure go at the wheel. If this does not work try letting the pressure go at the union on the master cylinder. I have seen folks open all the bleed nipples and allow the fluid to drain down so to speak. I have used pressure bleeders but in my mind it is a two person job. Rusty will have been there and experienced all the fun I'll bet.
Allan