Question about GMC Denali 700C Road Bike

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My brakes seem to move to one side, I tried adjusting the pads and also the cable but once I press the brakes, the whole assembly moves on one side and starts touching the rims even after I release them

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Yes but you didn't tighten the actual brake assembly. Grab a 10mm to 12mm box wrench and tighten that down. You should be good to go but before you ride off into the sunset make sure to do the other set as well and to readjust the brake pads on the rims and tighten all the pads snuggly.

Posted on Jan 16, 2013

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Parking brake functions but will not stop car?


The brake shoes or pads seem to be out of adjustment, the components inside the brake drum could also be corroded frozen . Unless you are qualified to do brake work, I don't recommend you do it yourself . Its called an emergency brake for just that reason ,you and your familys life could depend on it working correctly what ever the cost go to a professional .

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Re position the braking assembly so the stationary pad is just about to touch the rim and tighten. Then with the adjustment adjust the pad that moves so that it applies appropriate braking force when you squeeze the hand brake.

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How to adjust parking brake on 1993 chevy lumina ?




  • Adjustments




  1. Apply service brake pedal three times with a force of approximately 175 lbs.


  2. Fully apply and release parking brake three times. Full application may require two pedal strokes.


  3. Raise and support vehicle, then mark relationship between wheel and axle flange.


  4. Check parking brake pedal assembly for full release as follows:






    1. Turn ignition switch to On position.


    2. If ``Brake\'\' lamp is illuminated, operate manual brake release and pull downward on front parking brake cable to remove slack from pedal assembly.





  1. Remove rear wheel and tire assemblies, then install two lug nuts to retain each rotor assembly.


  2. If two parking brake levers on both calipers are not against lever stops on caliper housings, check for binding in rear cables and/or loosen cables at adjuster until both left and right levers are against their stops.


  3. Tighten parking brake cable at adjuster until either the left or right lever begins to move off the stop, then loosen adjustment until lever moves back barely touching stop.


  4. Operate parking brake several times to check adjustments. A firm pedal feel should be obtained by pumping pedal two full strokes and rear wheels should not rotate forward when parking brake is fully applied.


  5. Install wheel and tire assemblies, aligning marks made in step 3.

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1 Answer

Emergency brake stuck


Raise the car , use jack stands for safety, inspect the e-brake cable assemblies along the bottom of the car for any signs of impact damage. Next, spin each wheel to see if one or both wheels are affected. Remove both rear wheels , if you have drums, try to wiggle or pry the drum off with a couple of screw drivers , inspect for fallen or broken hardware, if all looks ok, roll the adjuster so the drums can be installed freely. If this is caliper style, remove caliper , press and rotate the piston inward at least 1/4 ,if your going to install new pads, go all the way in, re-install calipers and wheels, depress brake pedal until firm and recheck wheels for binding.

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Rubbing brake pad side pull brakes


Age old problem with side pull bakes. You have to loosen the brake assembly and try to move whole assembly a little to the other side. Also if you have a worn pad on one side and not the other, reverse the pads.

Aug 26, 2013 | Schwinn Cycling

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Have installed new (rebuilt) calipers on '83 El Dorado. Parking brake doesn't work on passenger side. Had to use tool to press piston in far enough for installation on other side (driver) but this...


Your description gives me a suspicion the calipers weren't rebuilt to a very high standard.

The pistons don't turn as they are pushed out but mostly they have to be rotated or screwed and pressed in prior to fitting the pads.

Once fitted and bled ensure the caliper parking brake lever is hard against the backstop and then press the brake pedal hard a few times and the adjustment should be complete after removing any slack or free play from the parking brake cable.
With a new or quality rebuilt caliper a good parking brake should be obtained without needing to shorten the cable so the caliper levers are lifted from the backstops. That is the sort of compromise needed as the internal components become worn.

Apr 07, 2017 | 1983 Cadillac Eldorado

1 Answer

Replacing rear brakes



REMOVAL & INSTALLATION
It is a good idea to only disassemble and assemble one side at a time, leaving the other side intact as a reference.

  1. Raise and support the vehicle safely.
  2. Remove the brake drum.
  3. Disconnect the parking brake rear cable and conduit.
  4. Remove the brake shoe hold-down springs and brake shoe hold-down pins.
  5. Remove the brake shoe adjusting screw spring.
  6. Remove the brake shoe adjusting lever and adjuster screw.
  7. Remove the brake shoe retracting spring.
  8. Remove the brake shoes from the backing plate.
  9. Remove and discard the parking brake lever clip. Remove the washer.
  10. Remove the parking brake lever from the rear brake shoe.

To install:
  1. Thoroughly clean the backing plate with brake cleaning solvent and dry completely.
  2. Use silicone grease to lubricate the brake backing plate-to-brake shoe contact areas.
  3. Apply a light coating of premium grease to the threaded areas of the adjuster. Turn the adjuster in and out to spread the lubricant. Turn the adjuster all the way down on the screw and loosen one-half turn.
  4. Install the parking brake lever to the rear (secondary) brake shoe with a new clip.
  5. Position the brake shoes on the backing plate and install the brake shoe hold-down springs.
  6. Attach the parking brake rear cable and conduit to the parking brake lever.
  7. Attach the brake shoe retracting spring.

The socket end of the brake adjuster screw is stamped with "R" or "L" to indicate that it is to be installed either on the right (passenger's side) or left (driver's side) of the vehicle. The adjuster nuts can be distinguished by the number of grooves machined around the body of the nut. Two grooves indicate a right-hand adjuster nut and one groove indicates a left-hand adjuster nut. Another way to identify brake adjuster assemblies is to check thread pitch. The right side adjuster assembly has right-hand threads and the left side has left-hand threads. If installed correctly, the brake adjuster assembly will increase in length when the brake shoe adjusting lever is operated.
  1. Install brake adjuster screw in the slots on the brake shoes. The wider slot on the socket end must fit in the slot on the front (primary) brake shoe.
  2. Install the brake shoe adjusting lever on the lever pin.
  3. Install the brake adjusting screw in the slot on the secondary brake shoe and in the slot on the brake shoe lever. The brake shoe adjusting lever should contact the brake adjuster screw.
  4. Adjust the brake shoes.
  5. Install the drums.


ADJUSTMENTS

The drum brakes are self-adjusting and require a manual adjustment only after the brake shoes have been replaced, or when the length of the adjusting screw has been changed while performing some other service operation.
Drum Installed

  1. Raise and support the vehicle safely.
  2. Remove the rubber plug from the adjusting slot on the backing plate.
  3. Insert a Brake Adjustment Tool (D81L-1103-C) or equivalent into the slot and engage the lowest possible tooth on the starwheel. Move the end of the brake spoon downward to move the starwheel upward and expand the adjusting screw. Repeat this operation until the brakes lock the wheels.
  4. Insert a small screwdriver or piece of firm wire (coat hanger wire) into the adjusting slot and push the automatic adjusting lever out and free of the starwheel on the adjusting screw and hold it there.
  5. Engage the topmost tooth possible on the starwheel with the brake adjusting spoon. Move the end of the adjusting spoon upward to move the adjusting screw starwheel downward and contract the adjusting screw. Back off the adjusting screw starwheel until the wheel spins freely with a minimum of drag. Keep track of the number of turns that the starwheel is backed off, or the number of strokes taken with the brake adjusting spoon.
  6. Repeat this operation for the other side. When backing off the brakes on the other side, the starwheel adjuster must be backed off the same number of turns to prevent side-to-side brake pull.
  7. When the brakes are adjusted, make several stops while backing the vehicle to equalize the brakes on both of the wheels.
  8. Lower the vehicle.

Drum Removed
See Figure 2


0900c152800ae432.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 2: When using a brake adjustment gauge, first measure the inside diameter of the drum (top) and then adjust the brakes shoes to the proper outside diameter (bottom)

  1. Remove the brake drum.
  2. Make sure that the shoe-to-contact pad areas are clean and properly lubricated.
  3. Using a Brake Adjustment Gauge (D81L-1103-A) or equivalent, check the inside diameter of the drum.
  4. Measure across the diameter of the assembled brake shoes, at their widest point.
  5. Turn the adjusting screw so that the diameter of the shoes is 0.030 in. (0.76mm) less than the brake drum inner diameter.
  6. Install the drum.


INSPECTION

See Figure 3


0900c152800ae433.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 3: Measure brake shoe thickness in several places around the shoe
Inspect the brake shoes for wear using a ruler or Vernier caliper. Compare measurements to the brake specifications chart. If the lining is thinner than specification or there is evidence of the lining being contaminated by brake fluid or oil, replace all brake pad assemblies (a complete axle set).

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