[00:00:30] However on the subject of what’s below the hood, I am the coed. Observe me as specialists train me how you can diagnose, repair, and modify vehicles on Autoblog’s Wrenched. – Alright, so what is the distinction between disc brakes and these right here, drum brakes. – Properly the disc brake really has two brake pads that squeeze collectively hydraulically by a caliper and create the friction to sluggish the automobile down. – Okay. – A drum brake has two sneakers which sit with springs on the within of this drum, and thru a wheel cylinder, hydraulically develop and trigger the friction
[00:01:00] on the within of this drum. – [Larry] So a caliper squeezes, and a drum type of pushes out. – [Spencer] Precisely. – [Larry] Okay. Alright nicely I’ve finished disc brakes earlier than and people went fairly nicely. Is that this the identical type of concept? – As soon as I present ya how, you can do it. – [Larry] It is necessary to grasp that it is a sophisticated job that has many alternative set-ups distinctive to every respective car, so remember, your particular drum brakes might not precisely resemble those present right here, and also you may want extra info or instruments
[00:01:30] particular to your automobile to do the job correctly. Bear in mind, our purpose with this video is to present you an concept of what is concerned in these kinds of initiatives must you select to exchange the brakes your self. For those who’re uncomfortable, merely rent an expert mechanic. First, we take away the drum with two bolts that, as soon as screwed in evenly, will slowly push the drum away from brake meeting. In any other case, just a few hits with a sledgehammer on both sides will assist dislodge the rusty drum, revealing the pads beneath. For novices like myself,
[00:02:00] Spencer urged I take a cellphone image of the brake meeting after I pull the drum off and particularly earlier than I begin pulling the sneakers aside. That is basically disassembling after which reassembling a giant jigsaw puzzle, so an image is value a thousand phrases to a novice. There are loads of particular instruments that make your life simple when eradicating drum brakes, however most will be finished along with your commonplace needlenose pliers. Start by eradicating the highest return spring with needlenose, or the particular spring pliers discovered at any auto retailer.
[00:02:30] This spring is used to drag the brake sneakers away from the drum when the brake pedal is launched. Subsequent take away the spring and pin that holds the brake shoe to the backing plate by compressing the small spring and twisting to unlock the pin holding it in place. Then take away the decrease spring, and the star wheel adjuster. One aspect ought to be eliminated at this level, and each bit regularly positioned on the ground or bench within the actual place it was eliminated that can assist you reassemble.
[00:03:00] Now take away the opposite shoe’s spring and pin holding it to the backing plate to permit you the flexibleness to take away the emergency brake cable, which will be tough at instances. The emergency brake meeting is usually hooked up to just one aspect of the brake shoe. Typically the entrance shoe, or typically the rear shoe, relying on the actual automobile. Both approach, you will most certainly must reuse this , so be additional cautious when disassembling these parts. We’ll come again to this shortly, however let’s take a more in-depth have a look at the elements. Discover the shoe closest to the entrance of the car
[00:03:30] is shorter in size than the shoe closest to the rear. That is why it may be useful to solely do one brake job at a time, and at all times examine the previous shoe with the brand new shoe to ensure they’re the best half earlier than you go any additional. Proceed to drag out all the brand new elements from the auto retailer and lay them out so as and do a fast stock. As soon as all of the elements have been accounted for, clear the previous elements that you will be reusing with brake clear, together with the brand new drum, which comes from the manufacturing facility with a skinny protecting coating for delivery
[00:04:00] that ought to be eliminated with brake clear previous to putting in. Use a wire brush to wash up the brake shoe’s contact factors with the backing plate. There are usually three spots on both sides. Right here, right here, and right here. As soon as brushed clear, add a lightweight dab of excessive temp grease to every spot. Now swap out the previous elements with the brand new substitute elements in your bench diagram, and double-check you might have all of the items in your package. Reinstall the previous emergency brake arm on the brand new shoe, however be very certain it is the right size shoe.
[00:04:30] Preserve referring again to your image to double-check what else must be added to the brand new shoe in your explicit drum brake set-up. Reinstall the emergency brake spring to the holder and safe the clip. Reattach the e-brake cable, and slide the pin from the again aspect by the backing plate and the shoe, and compress and twist the spring over the pin till it catches. This spring and pin is what holds the shoe in place.
[00:05:00] Now, reinstall the star wheel adjuster, however ensure it is clear, then lubricate it, so it strikes out and in freely. The adjuster threads are exhibiting, or in different phrases, have been prolonged as a result of put on on the previous shoe. Nevertheless, as a result of we’re changing with new or thicker sneakers, now we have to string again the star wheel to reset for the brand new sneakers, and to permit the drum to suit over them with out touching. Subsequent, deal with the decrease spring and high spring, then set up the spring and pin like we did on the opposite shoe.
[00:05:30] Earlier than we put the drum again on, shortly wire brush the hub face and add a lightweight dab of excessive temp grease to make sure the drum lays flat and would not wobble sooner or later. Afterwards, Spencer has me faucet the sneakers to ensure all the pieces is linked and centered to ensure that the drum to take a seat correctly. Now set up the brand new drum and hand-tighten just a few bolts to have it full seated. We’ll retorque the bolts correctly after we reattach the wheel.
[00:06:00] Spin the drum to get a really feel for a way free or tight the star wheel adjuster may be. At this level, it is regular or okay to have the drum spin freely. Nevertheless, a brake adjustment have to be finished with a screwdriver or a brake adjustment software that matches in a small gap within the again aspect of the brake meeting. The purpose right here is to spin the star wheel till the shoe is prolonged sufficient to have the drum spin, however has a little bit of drag when it is doing it. While you’re all set, put the wheel again on and make sure to torque them to your producer’s urged foot-pounds.
[00:06:30] As I am certain you have seen by now, changing your brake sneakers and is not any easy activity. Every brake meeting could also be barely totally different from the one proven right here, however use this video as a reference should you select to tackle this mission. For those who’re uncomfortable, search an expert mechanic. For extra how-to automobile restore movies, go to Autoblog.com/wrenched. I am Larry Kosilla from AmmoNYC.com. As at all times, thanks for watching.
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