1978 dual wheel Dodge Motorhomes present a somewhat unique challenge when it comes to performing rear brake work. In theory, the job is essentially the same as performing it on any other 1978 Dodge; however, the sheer weight of the Motorhome, and the dual rear wheels provide some extra hurdles you must get past in order to complete this job. As with all automotive repairs, only those who are able bodied and possess basic automotive repair skills along with a good set of tools should attempt this procedure.
Tools Used: Lug wrench, Heavy-duty floor jack, 2 heavy-duty jack stands, Drip pan, Brake cleaner, Drum brake tool, Dead blow hammer (optional)
Remove the Dual Wheel Brake Drums
Empty the Motorhome of any extra weight, such as household supplies and food.
Loosen the lug nuts on both rear wheels by placing the lug wrench on the lug nuts and turning each one counterclockwise. Slide the heavy-duty floor jack under the read differential and lift the rear end of the Motorhome high enough to place the heavy-duty jack stands under the rear axle. Place the jack stands outward along the axle tubes, towards the brakes.
Remove the lug nuts and all four rear wheels by hand. Dual wheels are often far heavier than standard car or truck wheels, so be prepared to deal with the weight.
Place the drip pan under the brake assembly on one side. Spray the outside of the brake drum with brake cleaner to remove any built-up brake dust. Insert the spray nozzle of the brake cleaner can into the crack between the brake drum and backing plate and spray inside thoroughly until the drippings that come from the bottom of the drum are no longer black. Brake dust is toxic, so avoid breathing it by removing as much as possible with the brake cleaner.
Turn the adjuster star on the backing plate counterclockwise with the drum brake tool to remove outward pressure on the brake shoes inside the drum. You can pick up a drum brake tool at most auto parts stores for about the same price as a screwdriver.
Pull off the brake drum by hand. If the drum will not come off, hit the face of the drum with the dead blow hammer approximately 1 inch above the center of the drum. Rotate the drum ¼ turn and hit it again. Repeat until you have hit the drum four times. Pull the drum off by hand now. If it still won't come off, continue hitting and rotating it until you can pull the drum off. Dead blow hammers are also available at most auto parts stores or tool retailers.
Repeat Steps 4 through 6 on the opposite side.
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