Wilwood Slave Cylinder - Manual (Page 3)

Slave Cylinder Mounting
Figure 4. Clutch Fork Hole, Peen or Counter Sink
PEEN OR COUNTER SINK HOLE
LOCK NUT
ADJUSTMENT NUT
CLUTCH FORK
SPRING TO BELL HOUSING OR CHASSIS
Clutch Fork Modifications (Continued)
Drill the hole in the clutch fork a little larger than the rod diameter to allow movement or change of angle without binding.
Dependent on fork construction material, peen hole slightly or counter sink to allow wider bearing area for pivot bushing,
see Figure 4.
Dependent on application, a clutch fork can either disengage the clutch by pulling toward the front of the vehicle, or by
pulling towards the rear of the vehicle. The following instructions are to be utilized for a clutch fork that disengages by
rearward motion (towards the rear of the vehicle).
Insert threaded rod through clutch fork mounting hole. Install pivot bushing and one adjustment nut. Hold cylinder along side
of transmission. Determine if there are existing bosses or studs available to use as a mounting location for rod end (within
limits of adjustment travel). If not, it may require a platform or bracket to be fabricated to hold the cylinder at the correct
distance and angle. Cylinder angle must be 90 degrees from clutch fork at the apex of travel and parallel with clutch swing
movement, see Figure 5. Off axis (angle) installation will cause premature wear or failure due to side loading. Do not mount
slave cylinder to chassis, as engine torque movement can cause changes in engagement and binding in the cylinder.
Figure 5. Slave Cylinder Mounting Requirements
CYLINDER PARALLEL
CLUTCH
FORK SWING
APEX
90°
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