Valeoscope Commercial Vehicles Clutch 2020

Valeo clutch and actuation for heavy duty

1.6 Release bearing The release bearing applies the disengagement efforts on the diaphragm through a determined stroke. ●● Sleeve: Specific to each type of gearbox and clutch linkage. ●● Ball bearing: Specifically designed to absorb the declutching efforts, and to work in more and more difficult conditions (temperature, dust). ●● Self-centering release bearing: The self-centering system allows a radial displacement of the ball bearing to be aligned with the axis of cover assembly to avoid the diaphragm fingers wearing. This auto-alignment is done when the mechanic starts the engine after the clutch replacement. Release bearing for Push type clutch This type of release bearing pushes on the diaphragm without a device. The release bearing contact on the diaphragm can be: ą ą toric for diaphragm with flat fingers ą ą flat contact for diaphragm with bombed fingers.

1.7 Actuation Clutch Master Cylinder (C.M.C.)

Fixed type release bearing The fixed release bearing has to be fitted on the diaphragm by a locking system before the assembly of the set on the flywheel. In case of complete kits, the release bearing is fitted by Valeo directly on the cover assembly.

The clutch master cylinder is connected directly to the pedal. The pressure applied to the pedal pushes the piston along the path inside the cylinder. The piston translates this force into hydraulic pressure and a volume flow, transferring it to the clutch slave cylinder or concentric slave cylinder via the clutch pipe.

Nr.

Part name

1

retaining ring

2

housing

3

cap

4

rubber plug

5

bushing

Fixed type release bearing

6

ring

7

spring

Snap-on/off release bearing This system consists of a hook cup system assembled on the diaphragm of the cover assembly and of a release bearing using a specific ball bearing shape. This release bearing is connected on the cover assembly once the gearbox is fitted back on the engine, with the help of the fork.

8

hood

9

plate

10

piston

11

sleeve

12

lip ring

13

sleeve

14

snap ring

15

protecting cap

16

piston rod

Clutch Master Cylinder

Flat contact bearing

Toric contact bearing

Snap-on/off release bearing

Release bearing for pull type clutch This release bearing needs to be connected to the diaphragm with a device. There are two types of pull-type release bearing:

ą ą fixed release bearing ą ą snap-on/off bearing.

16

17