GM Storm/Spectrum 1985-1993 Repair Guide

Brake Hoses and Lines

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REMOVAL & INSTALLATION



See Figures 1 and 2

A minimum clearance of 1 inch from all moving or vibrating parts must be maintained, when installing brake hoses and lines. Never use copper tubing for a brake line service repair.

  1. Raise and support vehicle safely. Remove wheel if necessary.
  2.  



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Fig. Fig. 1: Front brake hose



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Fig. Fig. 2: Brake hose and line

  1. Clean dirt and foreign matter from both brake hose and fittings.
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  3. Using a back-up wrench to hold the hose, loosen the connector nut with the proper size flare nut wrench and disconnect the hose from the fitting. Remove the hose retaining clip.
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  5. Drain the hose into a container. If equipped with gaskets on either side of the hose connections, discard old gaskets and replace with new.
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  7. Visually inspect the brake hose for signs of cracking, damage and swelling. Inspect the fitting threads for damage. Make replacements as required. If a repair or part is questionable, replace the part.
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  9. Visually inspect the brake line for damage, cracks, indentations or corrosion. Inspect the threads for damage. Make replacements as required.
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To install:
  1. Connect the brake hose to the brake line fitting by hand making sure new gaskets are in place, if equipped. Slowly tighten (by hand) the fitting and loosen it several times to ensure the correct mating of the threads.
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  3. Using the flare nut and back-up wrenches, tighten the fitting. Install brake hose retaining clip.
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  5. Fill the master cylinder and bleed the brake system.
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BRAKE PIPE FLARING



Flaring steel lines is a skill that needs to be practiced, before it should be done. Flaring steel lines should be used only as a last resort method of repair. If attempted, it is essential that the flare be done uniformly to prevent any leaks when the brake system is under pressure. It is also recommended that the flare be a double flare (rolled twice). With the supply of parts available today, a preflared steel brake line should be available to fit your needs. Due to the high pressures in the brake system and the serious injuries that could occur if the brake system (flare in a brake line) should fail, it is strongly advised that preflared lines are installed when repairing the braking system. If a line were to leak brake fluid due to an defective flare, and the leak was to go undetected, brake failure would result.

The following procedure applies to most commercially available double-flaring kits. If these instructions differ in any way from those in your kit, follow the instructions in the kit.

  1. Cut the brake line to the necessary length using a tubing cutter.
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  3. Square the end of the tube with a file and chamfer the edges.
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  5. Insert the tube into the proper size hole in the bar until the end of the tube sticks out the thickness of the single flare adapter. Tighten the bar wing nuts tightly so the tube cannot move.
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  7. Place the single flare adapter into the tube and slide the bar into the yoke.
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  9. Position the yoke screw over the single flare adapter and tighten it until the bar is locked in the yoke. Continue tightening the yoke screw until the adapter bottoms on the bar. This should form the single flare.
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Make sure the tube is not forced out of the hole in the bar during the single flare operation. If it is, the single flare will not be formed properly and the procedure must be repeated from Step 1.

  1. Loosen the yoke screw and remove the single flare adapter.
  2.  
  3. Position the yoke screw over the tube and tighten until the taper contacts the single flare and the bar is locked in the yoke. Continue tightening to form the double flare.
  4.  

Make sure the tube is not forced out of the hole in the bar during the double flare operation. If it is, the double flare will not be formed properly and the procedure must be repeated from Step 1.

  1. Loosen the screw and remove the bar from the yoke. Remove the tube from the bar.
  2.  
  3. Check the flare for cracks or uneven flaring. If the flare is not perfect, cut it off and begin again at Step 1.
  4.  

 
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