Wilwood Slave Cylinder - Manual (Page 4)

Page 4
Slave Cylinder Mounting (Continued)
After test fit installation, install pivot bushings and adjustment nuts. Cut excess threads on the rod mount to prevent
interference, leaving enough for future adjustment purposes. Do not attempt to capture rod by mounting nuts on both sides
of the fork as the rod must float. If you experience excessive movement or rattling, use a low tension spring positioned
from the fork to the bell housing or chassis to help prevent movement, see Figure 4.
Mounting for a clutch fork that disengages pulling toward the front of the vehicle is similar to description outlined above,
but the rod end or bracket will mount to the engine.
Install a stainless steel braided flex line (-3 is recommended size) from the slave cylinder to the chassis. 3/16” tubing is
recommended for use from the chassis to the master cylinder. Carefully route lines to prevent interference with moving
parts, linkage and exhaust.
Fill and bench bleed clutch master cylinder. Attach line and bleed slave cylinder. Slave cylinder will only bleed completely
with bleed screw at the 12:00 o’clock position. Test to see if full travel is experienced on the slave cylinder with the full
stroke of the clutch cylinder. If not, re-bleed the system.
Troubleshooting
Not enough travel on the slave cylinder:
• Trapped air in system, re-bleed the system.
• Not enough travel on the clutch pedal.
• Master cylinder sizing to small. Use .75” bore master cylinder.
Slave cylinder travel is the maximum amount (1.38”), but clutch will not fully engage or disengage within adjustment:
• Wrong location on clutch for rod mount attachment. Moving attachment point closer to clutch fork pivot point requires
less slave cylinder movement, or stroke. Farther away from pivot point requires more slave cylinder movement.
Slave cylinder wears, or leaks in a short period of time:
• Check alignment of slave and clutch fork for off axis force or binding.
• Check fluid, use only Wilwood DOT 3 or DOT 4 rated brake fluids.
NOTE: Silicone DOT 5 brake fluid is NOT recommended
for racing or performance driving.
Brake Testing and Pad Bedding
• Make sure pedal is firm: Hold firm pressure on pedal for several minutes, it should remain in position without
sinking. If pedal sinks toward floor, check system for fluid leaks. DO NOT drive vehicle if pedal does not stay firm
or can be pushed to the floor with normal pressure.
• At very low speed (2-5 mph) apply brakes hard several times while turning steering from full left to full right, repeat
several times. Remove the wheels and check that components are not touching, rubbing, or leaking.
• Carefully examine all brake components, brake lines, and fittings for leaks and interference.
• Make sure there is no interference with wheels or suspension components.
• Drive vehicle at low speed (15-20 mph) making moderate and hard stops. Brakes should feel normal and
positive. Again check for leaks and interference.
• Always test vehicle in a safe place where there is no danger to (or from) other people or vehicles.
• Always wear seat belts and make use of all safety equipment.
WARNING • DO NOT DRIVE ON UNTESTED BRAKES
BRAKES MUST BE TESTED AFTER INSTALLATION OR MAINTENANCE
MINIMUM TEST PROCEDURE