Mc Leod 1400 Series Slip On Hydraulic Bearing - Manual (Page 2)

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McLeod Slip-On Style Hydraulic Throw-Out Bearing
Installation Instructions
Before installing the hydraulic Throw Out Bearing Assembly let’s take a look at your master cylinder and
pedal assembly combination. Key parts to the system:
1) Master cylinder bore size (3/4” recommended). Bore Diameter found on side of most aftermarket
master cylinders.
2) Clutch pedal travel.
3) Master cylinder “Push Rod” stroke should be 1”minimum.
4) 6:1 Pedal ratio. See
http://www.mcleodracing.com/info/?id=5262 for more info.
The master cylinder push rod needs a minimum of 1” of stroke if using a ¾” bore master cylinder. Less
travel is required with a larger diameter bore, although pedal effort will increase. More travel is required with a
smaller diameter bore, with decrease in pedal effort. If a larger than ¾” bore is required for your application, you
can ease pedal effort by mounting the master cylinder and push rod higher up the pedal toward the pivot point.
This will increase the amount of leverage you have with the pedal, thus an easier push. You will lose some push
rod travel by doing this however with the larger bore master cylinder you are dispensing more fluid per stroke to
compensate for the loss of pedal travel.
A 6 to 1 ratio is recommended with a ¾” bore master cylinder. Example…If the center of the pedal pad is
12” from the pivot point, the push rod connecting point should be 2” below the pivot point. Quick math: Pedal pad
is 12” below pivot point, divided by 6 (desired ratio) = 2”. Push rod should be attached to the pedal assembly 2”
from the pivot point.
An optional pedal stop may be attached to the pedal or the firewall. A bracket with a bolt and a jam nut
work nicely so that the stop is adjustable for more or less travel.