Service manual

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