Help ID brake calipers

[Jeff Berk]

Well an update... I can only find 4 of the clips. So much for autocross this year.

[HS30-H]

17 minutes ago, Jeff Berk said:

On the right is the old dust seal with the metal ring inside. I mistakenly assumed it was a retaining clip. I need to clean them up but at least the couple I looked at this morning look serviceable.

Good! Glad to hear the retainer rings were present after all.

You're on top of it now, but just for posterity I pulled out some old used calipers and parts to take some photos of the component parts. Hopefully they are fairly self-explanatory.

Raw caliper casting (dirty!), showing the internal groove for the main fluid seal and the small counterbore which the dust seal retainer ring fits into: 

And here's a (typically rusty...) retainer ring roughly sitting in the counterbore in the caliper casting:

And here is the rubber dust seal, roughly installed on the lip of the retainer ring and with the piston in situ:

 

The four component parts: Piston, rubber dust seal, steel dust seal retaining ring and rubber fluid seal:

Note that the inner lip of the rubber dust seal slots into the groove in the piston, so it is fixed to both the caliper casting (via the steel retainer ring) and the piston, making a firm seal which still allows the piston to move:

Hope that helps somewhat...

 

[Jeff Berk]

Yup, that's what I have. I'm e-mailing e-za@vintagecraft-e-za.com to arrange purchasing 4 more rings since I only have enough to do one of the two calipers. 

[Captain Obvious]

9 hours ago, HS30-H said:

Odd that they don't show the retaining rings on their own, but I wonder if this is a legacy of the old rebuild kits which used to come with the dust seals already fitted with their retaining rings inside them?

Gotcha. Yup, the original seals probably came with the metal retainer ring already installed, and for that reason, they didn't call them out on the diagram. They were considered part of the seal.

[Patcon]

11 hours ago, HS30-H said:

He makes all sorts of other interesting stuff too. https://www.vintagecraft-e-za.com/

He does make some neat things. Thanks for the link

[Patcon]

9 hours ago, Jeff Berk said:

Yup, that's what I have. I'm e-mailing e-za@vintagecraft-e-za.com to arrange purchasing 4 more rings since I only have enough to do one of the two calipers. 

If it was me and not cost prohibitive I would order all 8 in stainless. The exchange rate is very much in your favor currently

[RIP260Z]

12 hours ago, Patcon said:

If it was me and not cost prohibitive I would order all 8 in stainless. The exchange rate is very much in your favor currently

That's what I have just done, I don't need now, but as its cheaper now, and I had no shipping cost (in with parts bulkier/heavier).

[Jeff Berk]

15 hours ago, Patcon said:

He does make some neat things. Thanks for the link

He is also very friendly. I just contacted him about getting a few of these dust shield retainers. At about $20 each, they are not cheap but for the effort to make them, its just worth buying. 

I found his wooden bicycle wheel writeup interesting. I have some bicycles older than my Z (Peugeot PX10E).

[Jeff Berk]

So far so good...

 I took the Z out for an autocross event last weekend and the brakes worked and didn't leak. I also talked to my local Z mechanic that I fall back on when I get stuck and he commented that if I'm not driving my car in harsh conditions, I likely didn't even need the boots. He said that his cars with Wilwood  brakes don't use them and sure enough, when I looked up Wilwood rebuilding kits, boots are not included.