Group 177 Design and Function Design and Function Clutch General For further information concerning component specifica- tions see service information in Group 1, “Oil and Filter Change Intervals for Volvo Components,” publication number 175–001, and appropriate vendor literature. Hydraulic fluid in the clutch system collects moisture from the air and will eventually hold enough moisture to affect the metal surfaces in the system unless removed. Replace the fluid at the recommended intervals or more frequently. The clutch pedal play (1) is given by the clearance be- tween the plunger and the piston (1a) in the master cylinder.
Thus the pedal will always have a play, regard- less of the clutch adjustment. The correct play is adjusted with the upper adjusting screw (1b) in the pedal carrier. Fig. 1: Clutch Volvo Clutch Slave Cylinder Slave cylinder stroke ( A ) is 29 ± 1 mm (1.14 ± 0.04 in.). The clutch pedal throw (2 - Figure 1) gives the stroke. The lower adjusting screw (2a) limits the pedal throw and thereby the clutch slave cylinder stroke. Distance B should never be exceeded. The distance is adjusted by removing the fork from the lever and reposi- tion lever on the cross shaft. Distance C is set when the clutch is new. During wear of clutch, the distance will decrease.
Readjustment should not be needed before it is time to reface the clutch disc. Fig. 2: Volvo Clutch Slave Cylinder 23