One-Circuit Operation - Suzuki Samurai 1986 Service Manual

One-circuit operation (Primary chamber "a" circuit failure)
Depressing the brake pedal forces the primary piston "A" to move as described previously, but since the
brake circuit connected to the chamber "a" cannot hold the pressure, no pressure is produced in the fluid
immediately ahead of the piston "A". The piston "A" keeps moving while compressing the spring and
when it reaches the retainer, the piston "B" is pushed and begins to move. This causes the pressure to rise
in the chamber "b" and the pressure acts on rear wheel brakes (right & left).
Fig. 19-4
One-circuit operation (Secondary chamber "b" circuit failure)
In this case, the leftward movement of the piston "A" has but little effect in causing the fluid pressure to
rise in the chamber "a" in the beginning, because the initial rise of the fluid pressure causes the piston "B"
to promptly yield and move to the left. However, when the forward end of the piston "B" comes to the
head of the cylinder and stops there, the Ieftward movement of the piston "A" becomes effective. Thus
the'fluid pressure is produced in the chamber "a" and it acts on front wheel brakes (right & left).
The below figure shows secondary piston "B" at halt.
Fig. 19-4
19-5