BRAKE SYSTEM REMOVAL AND INSTALLATION
30-12 EX20 Series
BRAKE SYSTEM
When assembling, be careful not to let any dirt or
dust get in.
High–pressure oil is stored in the piping connecting
the accumulator and brake valve even after the
engine has been stopped, so do as follows when
removing.
Method of removing
(1) Stop the engine.
(2) Depress the brake pedal repeatedly at least 10 times
to drain all the high–pressure oil from the piping to
the tank.
(3) Remove the piping.
Method of bleeding air
(1) Remove the cap from the air bleed plug, fit
one end of a vinyl hose, and put the other end
of the vinyl hose in a container of brake fluid.
(2) Loosen the air bleed plug approx. 3/4 turns,
then depress the brake pedal.
(3) Tighten the air bleed plug, then release the
brake pedal.
(4) Continue Steps (2) and (3) until no more bub-
bles come out from the hose.
(5) After completely bleeding the air, tighten the
plug and install the cap.
Bleed the air from the bottom cylinder first,
then bleed the air from the top cylinder.
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