Lesson 6/Learning Event
USING THE HYDRAULIC FILLER/BLEEDER
The hydraulic filler/bleeder is used to purge (remove trapped air)
hydraulic system such as a hydraulic brake or a hydraulic clutch system.
When a hydraulic brake or clutch system must have a component repaired or
replaced, the system must be opened. This allows air to enter the system.
Air in the system results in spongy pedal feel and action. Since air in the
system is compressible, reduced pressure and force result in poor braking
action when the brakes are applied.
Although you can bleed a hydraulic brake or clutch system without a
filler/bleeder, using it simplifies the job, and allows you to accomplish
the task without assistance.
hydraulic clutch systems, dual safety cylinders, dual clutch and brake
cylinders, all power brake systems, and any master cylinder with or without
a check valve.
The filler/bleeder, Figure 67, is a round cylinder divided into two chambers
by a tank diaphragm.
The top chamber holds hydraulic brake fluid.
bottom holds pressurized air.
The filler/bleeder is mounted on casters
(rollers) which allow it to be moved easily around the shop.