Subaru ff-1/1300/1400/1600/1800/Brat 1970-1984 Repair Guide

Hill-Holder®

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The Hill-Holder, introduced on late model cars, is a device that prevents the car from drifting backwards when starting up an incline from a stop. The Hill-Holder holds the brake on, temporarily, until the clutch pedal is released and the car is in forward motion.

A Pressure Hold Valve (PHV) is connected to one of the service brake lines. A clutch connected cable opens or closes the valve. When the vehicle is stopped and the clutch depressed hydraulic pressure is maintained even when the brake pedal is released.

REMOVAL & INSTALLATION



To remove the Hill-Holder PHV:

  1. Drain the fluid from the master cylinder primary side.
  2.  
  3. Remove the cable adjusting nut, clamp and cable mounting bracket from the engine mounting.
  4.  
  5. Detach the PHV cable from the mounting clips.
  6.  
  7. Separate the connector bracket from the PHV support.
  8.  
  9. Disconnect the brake line from the PHV. Use a flare wrench to prevent damage to the line nut.
  10.  
  11. Remove the PHV.
  12.  
  13. Installation is the reverse of removal.
  14.  
  15. Bleed the brake system after installing the PHV.
  16.  

ADJUSTMENT



  1. Inspect the clutch pedal free play adjust as necessary.
  2.  
  3. Test the Hill-Holder on a grade of 3° or higher.
  4.  
  5. If the vehicle moves when the Hill-Holder is applied or the engine stalls when the Hill-Holder is released:
  6.  
    1. Engine stalls: The Hill-Holder is releasing after the clutch. Loosen the adjusting nut gradually until smooth starting and no stalling is enabled.
    2.  
    3. Vehicle slips backwards: The Hill-Holder is releasing before the clutch. Tighten the adjusting nut so that the Hill-Holder is released after the clutch engages.
    4.  



WARNING
When adjusting the control cable nut be sure to prevent the cable from turning.

 
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