Clutch Master Cylinder

Clutch Master Cylinder
Function
Clutch Master Cylinder

ClutchRelease Bearing & Fork
Release Cylinder

The clutch master cylinder is a device
that transforms mechanical force into
hydraulic pressure. As the driverpresses the clutch pedal, the pedal
lever applies force to the clutch
master cylinder which transmits
hydraulic pressure to the clutch
release (slave) cylinder that
disconnects engine power to thetransmission.

Structure and Components[Conventional Type]
Inlet Union
Oil Spill Hole
Aluminum Body

Flare Nut Pipe Joint

BootSpring

Primary Cup

Resin Piston

Push RodRelSecondary Cup

Spring

Metallic Clevis Damper

Stud Bolt

The clutch master cylinder structure consists of the piston, cups, and springs, built within aprecision machined body. The primary cup, positioned on the leading side of the body,functions to create hydraulic pressure when fluid is forced inside by the piston. Located on
the trailing side is the secondary cup, which guides the piston and prevents fluid fromleaking. When the clutch pedal is pressed, the primary cup is blocked away by the piston
from the oil spill port leading to the reservoir tank, pressure in the cylinder rises as thefluid is fed through the pipeline. When the clutch pedal is released, the hydraulic pressure
and the force of the return spring pulls back the piston to relieve fluid back into thereservoir. The clutch master cylinder is what provides the necessary force to control theapplication of drivetrain power.

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Clutch Master CylinderVariations

Clutch Master Cylinder Variations●

Conventional Port-less Type●Stand Alone / Integrated Reservoir Type●

Types With and Without Stud Bolts●

Types With and Without Clevis Damper●

Types With and Without Clutch Booster[Stand Alone Reservoir Type]

Clevis Damper Type

Without Clevis Damper TypeStud bolt[Integrated Reservoir Type]

Reservoir tank3

Installation Procedure
CAUTION!

1

Failure to follow recommended procedures may cause clutch failure and injury.
Always consult the manufacturer's vehicle specific service manual for reference.

2

Do not allow dust, dirt, and debris toenter the cylinder or reservoir tank.

Always use vehicle manufacturer
specified fluid.

Dirt
DebrisDust
Specified brake fluid

Internal damage may occur, resulting in fluid
leakage and improper hydraulic pressure.

3

Other brake fluidsSealing can be impaired if mineral additives
are mixed with fluid which can cause clutch
failure.

4

Tighten bolts, nuts, and screws as
specified by the manufacturer'svehicle specific manual.

Damage of screws and threads may cause
improper function.

Adjust the clutch pedal leveraccording to the method specified by
the manufacturer's vehicle specificmanual.

Improper adjustment will cause poor clutch
engagement and release.

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Clutch Master Cylinder

CAUTION!

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Failure to follow recommended procedures may cause clutch failure and injury.
Always consult the manufacturer's vehicle specific service manual for reference.

Handle with care. Clutch mastercylinders are precision manufactured.
Do not drop or deform. Never use adamaged unit.

Optimal hydraulic pressure may not be
achieved due to damaged internal parts,
resulting in incorrect operation and injury.

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