New Parking brake pads wont fit under rotor

[75 911s]

Hey guys, I'm hoping one of you may have run into this problem before.

I just purchased new parking brake pads. They are the Dansk part 10-7196-010-m350

I have an early 75 (manufactured 9/74) I have the early 4 bolt 10mm axles. I'm not sure if that would affect the rotor type or size. It's the basic iron M rear caliper.



I've loosened the parking brake nuts at the banana arm so that there is no tension on the spreader mechanism. I've lowered the spreader/adjuster is all the way down. The rotor simply wont fit over the new e-brake pads.



I took the other pair which I haven't installed yet and put them on the bench to compare with my originals.


Sure enough, they are longer, by 2mm or so each side. I think this is the problem.



Has anyone run into this problem before? I don't see any other brake shoe for my 75 but wondering if there might be a slight difference somewhere.

[proporsche]

did you loosen the 2x 17mm nuts on the cable.It looks like you did not??
Ivan

[piscator]

Ivan may be right., although it could be a wrong part. My experience with installing Porsche e-brakes is that they're darn cantankerous! I wrestled with my mine until we mutually called it a draw. Next day they seem to fit. Go figure! Good luck!

[john walker's workshop]

Looks like the shoe isn't contacting the stop in the first picture. Loosen the cable nuts and get some slack going.

[75 911s]

Thanks guys- I believe the parts just don’t fit. The two nuts on the cable entering the back of the assembly are loose - so a lot of slack on the p-brake line. I jiggled the assembly around to make sure there was no tension there.

It’s not contacting there because both shoes are literally longer than the originals- the adjuster is all the way screwed in on the other side so there’s no where to go.

When I said there aren’t any other pads, I meant the part number works for my car according to a couple websites - there are actually 3 other choices for pads too. I bet the Porsche ones fit perfect. If you look at reviews for the other two brands, German and OEM, those don’t fit either, but they have a thickness problem, not a length problem.

To fix I took my Dremel to the edges and shaved off about 1 mm of material. I hand painted the ends with high temp paint to prevent rust. They fit perfect after that.

[proporsche]

also is you adjuster maybe upside down? take a pic and let us see it...

Ivan

[bkreigsr]

2 mm should not be a no-go factor.
Screw your star adjuster all the way in (it shows a lot of threads on the bottom still visible), and, like JW sez, make sure the shoes are fully seated on all four ends.

The star adjuster is for adjusting the shoe contact on the rotor drum, the cable adjustment thru the trailing arm is to adjust the height of the pull on the e-brake handle - 2-3 clicks is the optimal.

When installed correctly, you should be able to adjust the star through the hole without removing the rotor.

Bill K

[75 911s]

Originally Posted by proporsche

also is you adjuster maybe upside down? take a pic and let us see it...

Ivan

I don't know. It was on with the adjuster at the top. like shown in Wayne's 101 project book.



BUT I flipped it after reading the Haynes Manual Check these pictures out...





I've just put it all back together and it's working like I think it should. I've put the adjusting stars at the top.

Originally Posted by bkreigsr

2 mm should not be a no-go factor.
Screw your star adjuster all the way in (it shows a lot of threads on the bottom still visible), and, like JW sez, make sure the shoes are fully seated on all four ends.

The star adjuster is for adjusting the shoe contact on the rotor drum, the cable adjustment thru the trailing arm is to adjust the height of the pull on the e-brake handle - 2-3 clicks is the optimal.

When installed correctly, you should be able to adjust the star through the hole without removing the rotor.

Bill K

Thanks Bill - yeah they were screwed all the way in. I think the photo just doesn't show it clearly.

Thanks again for ya'lls help. To any future buyer of Parking Brake pads. Spend the extra $100 on the Porsche pads.

[Locker537]

The Dansk set of four is $27.

Porsche OEM are $124 per shoe, sold individually.

That's quite a difference.

[75 911s]

Sheesh! No wonder I bought the dansk. Well nothing my trusty Dremel couldn’t fix. They work fine btw.

[sugarwood]

Can you summarize what the issue was?
The Dansk shoes were a longer arc?
This prevented them from properly seating?

Walker's post #4 says they weren't even touching the stop in the first place.
So, where was the extra length an issue?

How is it that they worked for other people ?
They currently have two 5 star reviews on Pelican

[Lyle O]

I had the exact same problem a month ago. The Dansk “economy” set is simply longer by a couple of mm. If I were home in my garage I would take a photo and show the difference (I kept my old factory ones as a reference). What I did was retract the adjuster all the way to the collapsed position, and Dremel where the shoe fits the slot of the adjuster (that’s really where the extra length is) so it reduces the overall diameter of the brake shoe assembly as it fits inside of the drum. You have to grind off a fair amount. I messed with this for quite a while. What a pain. It all fits and works great now, but NOT worth the money saved on non-factory shoes. Just another case of “you get what you pay for”. Factory shoes from now on for me...

[rxtrom]

I had the same issue as well with the Dansk set and also used a dremel to round out the contact points. I used the old OEM shoes as a template.

[yelcab1]

And this is why professional mechanics use Porsche parts.

[JSV798]

Why does anyone replace parking brake shoes? They don't wear out; in over 30 year's Porsche ownership I have never needed to replace shoes. Only issue I ever had was with dragging cables; inner cable corrodes and binds on outer casing and it is then not possible to adjust the parking brake correctly. Have replaced both cables some time ago. Otherwise parking brake is fine.

[76FJ55]

I had to replace the shoes on my 85 and 86.5 928s. Not because the pads wore out, but the adhesive failed and the friction material didbonded from the metal. One with over 200k miles and the other with about 65k, so it seems to be time defendant not usage.

[safe]

Originally Posted by JSV798

Why does anyone replace parking brake shoes? They don't wear out; in over 30 year's Porsche ownership I have never needed to replace shoes. Only issue I ever had was with dragging cables; inner cable corrodes and binds on outer casing and it is then not possible to adjust the parking brake correctly. Have replaced both cables some time ago. Otherwise parking brake is fine.

+1
Rust can make the friction material falling off. My 69 has 2 missing inches of material. Still works fine...

Some are anal about having shiny new stuff where someone would never see them when everything else is perfect. I'm not judging, I have a car on that path.

But the above example a wire brush and some paint would be 100% sufficient, I think.

[Locker537]

Originally Posted by JSV798

Why does anyone replace parking brake shoes? They don't wear out; in over 30 year's Porsche ownership I have never needed to replace shoes. Only issue I ever had was with dragging cables; inner cable corrodes and binds on outer casing and it is then not possible to adjust the parking brake correctly. Have replaced both cables some time ago. Otherwise parking brake is fine.

The adhesive had failed on mine as well. I assumed someone had driven with the parking brake engaged ... more than once ... or maybe it was simply age.

Either way, the brake did not work, so the shoes were replaced.

[sugarwood]

I've driven for 5-10 seconds before realizing the brake was engaged.
I plan to remove my rotor and inspect the parking brakes, one day.

[75 911s]

Originally Posted by sugarwood

Can you summarize what the issue was?
The Dansk shoes were a longer arc?
This prevented them from properly seating?

Walker's post #4 says they weren't even touching the stop in the first place.
So, where was the extra length an issue?

How is it that they worked for other people ?
They currently have two 5 star reviews on Pelican

The replacement shoes are not the same dimensions as the ones I removed. You can clearly see it in the first picture I posted. They are literally several mm longer. Focus on the straight edge and how it touches the OEM shoe at the bottom and has several mm of space between the top (however the shoe material is lined up).

Walker surmises that they aren't touching the stop, but they were. First thing I checked, and rechecked multiple times to ensure they were contacting there. I think the photo just didn't show it very well. And he was right to suggest that as they have to be seated properly before the rotor goes over.

I think they "worked for other people" in a few ways.
1. They actually didn't work and they never documented the problem and probably put the old shoes back on or sent the dansk shoes back.
2. They actually didn't work and they fixed them like I did and never documented it.
3. Other factors such as variations in hub design throughout the years that I may not be aware of.

Interestingly, I just removed the e-brake shoes off of a friends 78 trailing arms. They had been altered in the same fashion as mine. ie the ends were shaved down and modified.

Hope that helps.