Tech

 

ATR HQ-WB Hydraulic Clutch Pedal Assembly

Installation Instructions

 

Pre-Installation Notes:

Please ensure that you have the correct pedal assembly for your application. Early vehicles e.g. HQ have a bolt hole spacing of 1 ¾” between the brake pedal bolt hole and the clutch pedal bolt hole. Later models e.g. HZ have a spacing of 2 ¾”. WB models have all 3 holes and can use either early or late assemblies. Please refer to Figure 1 & 2.

The use of a 1/8 NPT x -3AN 90 elbow is recommended for the outlet of the master cylinder.

Braided line is recommended to be used depending on the Hydraulic throw-out bearing/ slave cylinder application.

 

Use only DOT 3, DOT 4 or DOT 5.1 fluids.

 

Parts Included:

Qty

Part

1

Hydraulic clutch pedal assembly

1

Top Bolt ½ x 6.5” UNC

1

Lower Bolt (Early ½ x 6” UNC)  (Late ½ x 4” UNC)

4

½” Washers

1

Wilwood Reservoir + Hose

 

Installation Procedure:

 

  1. Factory manual vehicles may begin by disconnecting and removing and remaining clutch cables or linkages.
  2. Remove the ½” brake pedal pivot bolt and allow pedal to hang. Repeat the procedure for the factory clutch pedal bolt, removing the pedal. (If fitted.)
  3. Install the supplied ½” UNC bolt (6” Long- Early, 4” Long- Late) through the lower hole first, followed by the ½ x 6.5” UNC bolt through the brake pedal hole with the thread towards the centre of the vehicle.
  4. Install 1/8 NPT fitting to the rear of the Wilwood master cylinder.
  5. Slide clutch pedal assembly over the ½ UNC bolts. (Some models may require a ½” Washer to be placed over the lower bolt before assembly is attached)
  6. Models where the clutch pedal is supplied loose may now slide pedal onto the lower ½ UNC bolt. Followed by a ½ “washer and cone lock nut. Repeat for the brake pedal pivot bolt.
  7. Snug both nuts down but do not tighten completely.
  8. Remove ‘R’ clip from pedal pushrod pivot, remove 1 washer and slide push rod end onto shaft. Replace 1 washer followed by the ‘R’ clip.
  9. Check pedal height in relation to the brake pedal pad. The assembly may be tilted slightly up or down to correct height. Once satisfied tighten both upper and lower pivot bolts.
  10. Paying attention not to overtighten lower clutch pedal pivot bolt. Once tight, ensure that the clutch pedal moves freely without binding.
  11. Check that the pedal has complete throw without obstructions such as carpet etc.
  12. Select suitable position for the remote reservoir on firewall or similar. Plumb reservoir and hydraulic line to master cylinder.
  13. Install clutch line and bleed system while checking for leaks. Use only DOT 3, DOT 4 or DOT 5.1 fluids.