1. Teknik Kendaraan Ringan
MASTER CYLINDERS
Teknik Kendaraan Ringan
Semester 4 th Class XI
Kompetensi Kejuruan
SK-KD 12TH

2. DIAGRAM ALUR PENCAPAIAN KOMPETENSI

3. The Master Cylinder

4. Dual Master Cylinder Cast Iron (One Piece)

5. Master Cylinder
Plastic and Aluminum
Lighter Weight
Bore is anodized

6. At Rest
Replenishing Port
Release (Return Stroke)

7. Allows Brakes to Release
Spool Area
Fill Port (Vent Port)
Allows Brakes to Release

8. Residual Check Valve Old Style Single Master Cylinder
Used on Drum Brakes

9. Residual Check Valves
Four Wheel Drum Brake Maintains 5 psi in lines

10. Modern style Two separate Systems Can be split diagonally
Maintains one half of brake system during failure
Pushrod contacts secondary piston

11. Quick take up Designed for zero disc drag fwd cars
Provides large volume of fluid at low pressure with little pedal movement

12. Quick take up Bore is two different sizes at primary piston
Contains a “fast fill valve”
Takes up “free play” in disc brake retracting seals and drum brake return springs
Beginning Application

13. Quick take up valve
When “play” is taken up, pressure builds and excess fluid unseats fast fill valve and fluid flows to reservoir
On brake release, fluid flows through fast fill for primary and vent port for secondary

14. Quick take up valve Beginning Application Pressure is unequal
Increases working pressure ahead of primary piston

15. Quick take up valve Pressure equalized
Ball opens and allows fluid to return to reservoir