Isuzu KB P190. Manual — part 1196

7C-6 CLUTCH

4JK1 (High Output) (MUA) /RHD, 4JJ1 (High Output) (MUX)

RTW77CSF000101

4JK1-TC, 4JJ1-TC, 4JA1-T (MSG, MUA) /RHD

RTW47CSF000401

The master cylinder converts mechanical energy into hydraulic energy.
Depressing the clutch pedal causes the push rod to move against the piston to close the return port.
Clutch fluid is forced out of the master cylinder.
Releasing the clutch pedal causes the return spring to force the piston back to its original position.
The return port is opened and the clutch fluid flows back into the fluid reservoir.
Quickly releasing the clutch pedal will cause the fluid pressure at the return spring side to be lower than the fluid
pressure at the push rod side.
This allows the fluid at the push rod side to quickly flow to the return spring side through a port in the piston head.
This equalizes the pressure at both sides of the piston.

CLUTCH 7C-7

SLAVE CYLINDER

4JJ1 (High Output) (MUX)

RTW77CSF000701

4J series (MSG, MUA)

C24SE (MUA)

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The slave cylinder converts hydraulic energy into mechanical energy.
Hydraulic fluid supplied by the master cylinder moves the slave cylinder piston to actuate the shift fork.
The mechanical energy produced by the slave cylinder is directly proportional to the diameters of the master
cylinder and the slave cylinder.
A bleeder screw is provided to bleed the slave cylinder.

7C-8 CLUTCH

The Clutch Damper Valve is installed in the slave cylinder for MUX.
The Clutch Damper Valve delays return speed of clutch fluid when clutch is being engaged quickly at Low or
Reverse, and decreases a shock torque transmitted to drive train.

CLUTCH 7C-9

HYDRAULIC DAMPER CYLINDER

RTW77CMF000401

The hydraulic damper cylinder is installed between the master cylinder and the slave cylinder to smooth out
variations in clutch pedal feel.