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) 
  

 

RTW47CSF000301 

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.