E brake problem and 930 caliper

[JGibb62]

The e brake is scraping. I want to remove caliper to check drum. I'm a novice. Do I remove brake line and how to prevent brake fluid from spilling? Tech article says to loosen clip where rubber and hard line meet but it seems there won't be enough play in hard line without disconnecting. I also could drain brake fluid to replace as it is due for replacement.

[dos531]

Just unbolt that caliper and move it to the side and support it so it doesn't hang on the brake lines. No need to remove the lines. Rotor is held on by 2 bolts.

[m110]

I use the wire for tying rebar together...just the right stiffness and easy to cut...its at any store

Remember 63 ft-lbs torque for the bolts (I think)...it's a fair bit for a hand tool in that position

[KTL]

I think you're bettor of removing the hard line connected to the caliper, in order to get the caliper off. Removing the clip on the trailing arm doesn't give you the ability to move the caliper around like you need to.

You can stop the brake fluid from running out of the open line by using a length of 2x4 wood against the brake pedal and the front of the seat. Its like having someone slightly press the brake pedal for you. Pressing the brake pedal blocks the free inflow of fluid from the brake fluid reservoir and that's why the fluid won't flow when the line is open

[bkreigsr]

You don't mention what car you have, or more importantly, whether or not the calipers were added or came on the car - if it is a 930.
FWIW, there's an access hole in the rotor for adjusting the p-brake star wheel that makes caliper removal unnecessary.
Cut a broom stick to length and prop it between the seat and brake pedal to hold the pedal down 1-1.5 inches to prevent fluid loss.
Bill K

Nevermind, I see the spacers so it is a 930 with the original calipers.

[JGibb62]

Probably will remove caliper. The hard line is also attached to the arm. I don't want to risk bending/breaking hard line. I still need to determine why ebrake is scraping. Keep you posted. Thanks for the input.

[KTL]

I agree with Bill K the star wheel access hole in the rotor is worth looking at first.

That said, parking brake system on older cars always seems to have some kind of issue that needs a little more work than just clicking the star wheel. Can be too much throw on the handle inside the car, crunchy and/or stiff cable operation, dragging/squeaking (which usually results in overly worn & tapered brake shoes), poor release characteristics, the list goes on......

I think it'd be time well spent to get the rotor off and have a good look at the whole parking brake assembly. It's really not that complicated and probably is a simple fix. Just don't try to force the rotor off by yanking on it repeatedly. People often do that and what happens is they wind up bending the backing plate that mounts the entire parking brake assembly onto the trailing arm. If the rotor doesn't come free from the brake shoes (this is usually quite obvious because you can feel the shoes hanging up on the drum & the backing plate flexing as you're pulling on the rotor), you have to retract the shoes by loosening the star wheel thru the access hole on the rotor hub.

[JGibb62]

I tried turning the star wheel with a screw driver through the large hole in the rotor cap to no avail. Gonna take the rotor off. Thanks again.

[JGibb62]

Rotor is off. A small metal piece fell to floor actually two pieces and a spring was inside rotor. Looks like spring broke and was rubbing. See photos. Thoughts?

[KTL]

Looks like #31 springs that retain the shoes onto the backing plate



Its part number 930.352.957.00

[JGibb62]

thx. where did you fing parts diagram?

[KTL]

Genuine Parts Catalogue - Classic Genuine Parts & Technical Literature - Porsche Classic - Dr. Ing. h.c. F. Porsche AG

Choose your Porsche from the dropdown lists and download the pdf

[m110]

930-352-957-00

[lucasdw63]

What if you cant rotate the wheel to get the star wheel aligned?

[KTL]

Are you saying your rear axle is unable to rotate? Is it because of the parking brake or something else?

Sometimes you can muscle the rotor off of the parking brake shoes without retracting the shoes via the start wheel and not do much damage to the backing plate that the shoes are mounted to. But i'd only do that as a last resort. If the parking brake is stuck, it's usually because of the cable. Try freeing the cable by disconnecting it from the handle assembly inside the car and that can allow some slack in the cable. Once the cable is slacked, you can yank on it near the brake assembly and get it to free itself.

[JGibb62]

I took caliper, rotor off. The spring clip on top was gone. This caused e brake pads to scrape. Fixed now.