Nissan Pick-ups and Pathfinder 1989-1995

Brake Hoses and Lines

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INSPECTION



See Figures 1 through 6

Inspect the hydraulic brake lines at the recommended intervals in the maintenance schedule. Check the flexible brake hoses that connect the steel tubing to each wheel cylinder. Replace any hose that shows signs of softening, cracking, or other damage. Follow the steel tubing from the master cylinder to the flexible hose fitting at each wheel. If a section of the tubing is found to be damaged, replace the entire section with tubing of the same type (steel, not copper), size, shape, and length.



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Fig. Fig. 1: Brake hydraulic lines-1989 heavy duty models with a Load Sensing Valve



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Fig. Fig. 2: Brake hydraulic lines-1989 models with a master cylinder-mounted proportioning valve



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Fig. Fig. 3: Brake hydraulic lines-1989 non-heavy duty models with a Load Sensing Valve



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Fig. Fig. 4: Brake hydraulic lines-1990 and later models with a master cylinder-mounted proportioning valve



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Fig. Fig. 5: Brake hydraulic lines-1990 and later models with ABS



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Fig. Fig. 6: Brake hydraulic lines-1990 and later models with a Load Sensing Valve

REMOVAL & INSTALLATION



Flaring steel lines is a skill that should be practiced before it is performed on a vehicle's brake line. It is essential that the flare be made uniformly to prevent any leaks when the brake system is under pressure. It is also recommended that the flare be a double flare. With the supply of parts available today, a preflared steel brake line should be available to fit your needs.

When installing a new section of brake tubing, flush clean brake fluid or denatured alcohol through to remove any dirt or foreign material from the line. Be sure to double flare both ends to provide sound, leak-proof connections. When bending the tubing to fit the underbody contours, be careful not to kink or crack the line. Tighten all hydraulic connections to 10-15 ft. lbs. (15-18 Nm).

When installing a new front brake hose, position the hose to avoid contact with other chassis parts. Place a new copper gasket over the hose fitting and thread the hose assembly into the front wheel cylinder. A new rear brake hose must be positioned clear of the exhaust pipe or shock absorber. Thread the hose into the rear brake tube connector. When installing either a new front or rear brake hose, engage the opposite end of the hose to the bracket on the frame. Install the horseshoe type retaining clip and connect the tube to the hose with the tube fitting nut.

Always bleed the system after hose or line replacement. Before and during bleeding, make sure that the master cylinder is kept full of the specified clean brake fluid.

 
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