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Ronnie

BMW 5 series E39 rear pads, discs and handbrake shoe replacement.

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BMW 5 series E39 rear pads, discs and handbrake shoe replacement.

Loosen rear wheel bolts, jack the rear of your car up, place axle stands underneath and then remove your wheels.

Pull the handbrake gaiter out and using a suitable socket, slacken off the handbrake cables.

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Rotate the disc until you can see the brake shoe adjusting wheel.

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De-adjust the shoe adjuster using a screwdriver.

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Remove the caliper securing spring.

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Remove the brake pad sensor.

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Remove the 2 plastic caps then using a 7mm Allen key, remove the Allen key bolts.

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Remove the brake pads then undo and remove the caliper frame securing bolts.(16mm)

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Remove the disc retaining Allen key bolt(6mm)

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Using a hammer, give the disc a sharp hard hit to slacken the disc from the hub, then pull the disc off from the hub. You can see here the inner handbrake surface is pretty rusty, compromising the shoes gripping the disc.

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Using a 5mm Allen key, remove the shoe retaining pins.

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To remove the shoes, I use a long screwdriver on the top spring and lever against the hub to remove the spring, then pull the complete shoe set down with the bottom spring and adjuster still attached to the shoes.(New shoes in pics as I was in a rush)

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Clean up the brake back plate with a wire brush, clean up the adjuster and handbrake fulcrum/lock, then lightly grease up the contact points,(be careful not to get carried away as any grease over the shoes will negatively impact performance), grease up your adjuster threads and your handbrake fulcrum/lock, then refit your handbrake lock to the cable.

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With your new shoes off from the car, fit the lower spring on the shoes, slide in the adjuster, then open up the shoes at the top and then slide them over the hub and into position, then secure them with the retaining pins.

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Now fit your top spring, same principle as when you removed the spring earlier, use a long screwdriver and lever against the hub, double check the shoes are all located correctly on the adjuster and handbrake lock and all springs are fitted correctly

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You're now ready to fit your disc, make sure the adjuster is fully wound back in as shown below before attempting to fit the new disc. (Ignore the lack of lower spring, photos were taken at different times during work)

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Fit your new disc minus the Allen key securing bolt, rotate the adjuster until you can no longer rotate the brake disc on the hub, then back off the adjuster 5 clicks, make sure the disc spins easily enough backwards and forwards, you can now fit the disc securing bolt.

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Clean up your caliper frames, mainly where the brake pads come into contact with the frame, the pads should be able to slide easily in the frames with no great resistance. A wire brush, sandpaper and/or a file can be used. Then copper slip the points where the pads make contact with the frame, make sure you don't spill to much on the inside of the frame, else it will go over the disc when fitting the frame. Bolt up the caliper frame and torque the bolts up to the required setting.

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You're now ready to push the caliper pistons back, remove the reservoir top and check you have sufficient space for the excess fluid in the reservoir when the pistons are pushed back, else it will overflow out. You can use a syringe or lots of tissue paper to soak up any excess fluid.

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Apply some brake pad anti squeal to the rear surface of your pads before fitting them, then bolt up your rear caliper, torque it up, fit your anti rattle spring and your new brake pad sensor.

Once you're happy everything is fitted correctly, pump the brake pedal to allow the pads to come into contact with the discs, then check your brake fluid level.

Fit your wheels and torque them up to the required setting.

To extinguish the brake pad warning light, leave the ignition on for 30 seconds, it should reset itself, if it doesn't then check your sensor is connected properly, else you may have a faulty sensor. Later models with iDrive will need to be reset through the dash or with diagnostic equipment. For the first 100 odd miles you should avoid excess heavy braking, to allow the pads to bed in nicely.

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On 10/20/2018 at 8:32 PM, Gazza said:

I have to renew the rear discs, will I have to de-adjust the handbrake ?

You should yes Gazza, as the new discs probably won't fit over the shoes, also if someone has previously not set up the handbrake correctly, you may end up with a poor handbrake.

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