Pic. 10.2. Mounting bolts (arrows) instrument panel upper upholstery in the front passenger's footwell
The pressure rod of the working cylinder has a different diameter between the piston and the clutch release lever. Depending on the size of the output of the rod from the flange of the working cylinder, the diameter of the rod changes, and the penetration of the caliber to one or another length determines the degree of wear of the lining of the clutch disc. The caliber can be made independently from a steel plate with a thickness of 0.6–0.8 mm and a width of 15 mm (pic. 10.2). If the caliber marks are not visible behind the flange of the slave cylinder, then the wear of the clutch disc is negligible.
Sequence of work
1. Place the car on stands and remove the lower engine protection.
Pic. 6.2. Clutch wear check: 1 - clutch slave cylinder; 2 – cylinder flange; 3 - a rod leading to the clutch release lever; 4 - test gauge
2. Insert test gauge 4 (pic. 6.2) into the groove in front of the flange of the working cylinder until it stops.
3. If marks are visible (shown by arrows) along the edges of the F caliber, the wear of the linings is close to the limit, that is, about 2 mm remains from the original 3.8 mm, in the future the clutch will begin to slip. If the caliber marks are not visible behind the flange of the working cylinder, the clutch disc is in good condition.