Clutches & Flywheels

Question 1

What is the clearance needed in between a manual adjusting slave cylinder and release fork?

Answer 1

3mm (0.125”)

Question 2

What are Flywheels made of?

Answer 2

Modular or Grey Cast Iron with high graphite content to lubricate the clutch

Question 3

What is a dual mass flywheel?

Answer 3

Flywheel made with coil springs to absorb vibrations

Question 4

define a coil spring type pressure plate

Answer 4

Uses springs to move 3 release levers (typically 120 degrees apart) to disengaging clutch

Question 5

define a diaphragm type pressure plate

Answer 5

Uses cone shaped diaphragm (single sheet of spring steel) between plate ring and plate cover to disengage clutch

Question 6

What are the 3 types of flywheel faces?

Answer 6

Flat, Recessed & Stepped

Question 7

what are the types of friction surfaces?

Answer 7

molded & woven

Question 8

What can cause difficulty shifting into gears?

Answer 8

excessive free play or clutch disc sticking to splines

Question 9

What causes pedal pulsation when slightly depressed?

Answer 9

uneven release fingers

Question 10

What causes vehicle to shutter/lurch when engaging clutch?

Answer 10

Clutch disc grabs flywheel or damaged marcel/torsion springs

Question 11

What causes a slipping clutch?

Answer 11

coefficient of friction between pressure plate and flywheel is to low (oil coating, worn facings, weak diaphragm springs, etc.)

Question 12

What causes noise when clutch is disengaged?

Answer 12

worn release bearing

Question 13

How does a master cylinder operate?

Answer 13

A pushrod moves a piston and primary cup to create hydraulic pressure. A secondary cup at the snap ring end of the piston prevents external leaks