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the drum if machining causes the drum to exceed the BRAKE LINE AND HOSES Flexible rubber hose is used at both front brakes and at the rear axle junction block. Inspect the hoses Inspect the hoses for surface cracking, scuffing, or worn spots. Replace any brake hose immediately if Also check brake hose installation. Faulty installa- tion can result in kinked, twisted hoses, or contact The steel brake lines should be inspected periodi- cally for evidence of corrosion, twists, kinks, leaks, or Factory replacement brake lines and hoses are rec- ommended to ensure quality, correct length and supe- Use new copper seal washers at all caliper connec- tions. Be sure brake line connections are properly BRAKE FLUID CONTAMINATION Indications of fluid contamination are swollen or deteriorated rubber parts. Swollen rubber parts indicate the presence of petroleum in the brake fluid. To test for contamination, put a small amount of drained brake fluid in clear glass jar. If fluid sepa- If brake fluid is contaminated, drain and thor- oughly flush system. Replace master cylinder, propor- SERVICE PROCEDURES BRAKE FLUID LEVEL Always clean the master cylinder reservoir and cap before adding fluid. This will prevent dirt from fall- The reservoir has a ADD and a FULL mark on the side (Fig. 11) fill to the FULL mark. MASTER CYLINDER BLEEDING A new master cylinder should be bled before instal- lation on the vehicle. Required bleeding tools include BLEEDING PROCEDURE (1) Mount master cylinder in vise. Then position each tube end into reservoir (Fig. 12). Fig. 10 Measuring Rotor Thickness 1 – MICROMETER Fig. 11 Master Cylinder Fluid Level 1 – FLUID LEVEL MARKS 5 - 12 BRAKES XJ DIAGNOSIS AND TESTING (Continued) |