Mc Leod Soft Lok - Manual

Soft Lok Clutch Instruction
The Soft Lok clutch assemblies consist of an adjustable Ford/Long style pressure plate, sintered iron disc
and flywheel. Steel flywheels are normally used on engines that are under 450hp but usually are not
heavier than 22 lbs. Engines over 450hp use an aluminum flywheel with a steel insert. Car weight, tire
size and gearing do play into this decision. Call the McLeod Tech Line if you need a recommendation.
Warning: DO NOT USE SOFT LOK ON ANY DYNO!!
The McLeod Ford/Long style pressure plate has an aluminum pressure ring inside with a steel face
riveted to it. It has nine springs, six are adjustable. Most Soft Lok clutches have 200 lbs of base pressure.
Each of the six adjusters are found on either side of the levers. It is important to have steel surfaces on
either side of the disc to keep the same coefficient of friction.
The disc is sintered iron and is very aggressive. In order to control the aggression, McLeod reduced the
pressure in the pressure plate. This disc has a special characteristic and is expressed as: “The hotter it
gets, the harder it bites”. This will be explained further in these instructions.
Soft Lok Assembly shown with aluminum flywheel
PREPARATION:
When you receive your Soft Lok assembly, bolt it up to the flywheel. Remove the lever blocks
between the three levers and the pressure plate cover. Get yourself a T-Handle Allen wrench that fits the
six adjusters. (Helpful Hint: mark one of the ‘T’ by painting, striping or taping it). Put the T-Handle in one
of the adjusters and move it back and forth ½ turn. Get used to the feel of what base pressure feels like.