GreenWorks CU800 - Bleeding the Hydraulic Brake System

MAINTENANCE AND ADJUSTMENT OF EV CU800 Service Manual
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3.2.6 Bleeding the Hydraulic Brake System
WARNING
Bleed the brake system if:
· The system has been disassembled.
· A brake hose or brake pipe have been
loosened or removed.
· The brake fluid has been very low.
The brake operation has been faulty. A
loss of braking performance may occur if
the brake system is not properly bled.
1. Bleed:
·brake system
a. Add the proper brake fluid to the reservoir.
b. Install the diaphragm. Be careful not to spill
any fluid or allow the reservoir to overflow.
c. Connect the clear plastic hose ① tightly to
the caliper bleed screw ②.
□
F
Front
□
R
Rear
d. Place the other end of the hose into a
container.
e. Slowly apply the brake pedal several times.
f. Push down on the pedal and hold it.
g. Loosen the bleed screw and allow the pedal
to travel towards its limit.
h. Tighten the bleed screw when the pedal limit
has been reached, then release the pedal.
i. Repeat steps (e) to (h) until all the air bubbles
have disappeared from the fluid.
j. Tighten the bleed screw.
NOTE
If bleeding is difficult, it may be necessary to let the brake fluid settle for a few hours.
Repeat the bleeding procedure when the tiny bubbles in the system have disappeared.
k. Add brake fluid to the proper level.
WARNING
Check the operation of the brake after bleeding the brake system.