SWM SM 500 R E4 2018 Manual - Uso - Mantenimiento página 135

FRONT BRAKING SYSTEM BLEEDING
The braking system must be bled after the fluid
replacement or when, due to air in the circuit, the
lever stroke is long and spongy.
Regarding the front braking system, first proceed
to bleed the upper braking system control, then the
brake caliper.
In both cases, proceed as follows:
- Remove the rubber cap on the bleeding valve
(1).
- Fit a transparent plastic tube on the bleeding
valve (1) and insert the other end of the tube
in a container (make sure that the end of the
tube stays immersed in the fluid throughout the
operation).
- Remove fluid reservoir cap (2), the rubber and
fill the reservoir with fresh brake fluid.
- Open the bleeding valve (1) and pump with
brake lever several times until the fluid, clear
and without bubbles, comes out of the hose:
now close the bleeding valve (1).
- Repeat the same operations acting on the
bleeding valve (1A) positioned on the brake cal-
liper.
- Restore the brake fluid level (A) then reassem-
ble the rubber and the fluid reservoir cap (2).
2
A
1
B
WARNING*:
During the bleed operation the fluid level inside
the reservoir must never be lower than the mini-
mum level.
Tightening torque for bleed valve is 1,2 ÷ 1,6 kgm
(12 ÷ 16 Nm; 8.8 ÷ 11.8 ft-lb).
As the braking fluid is a very corrosive sub-
stance, in the case it comes in contact with your
eyes wash them abundantly with water.
During the bleeding of the braking circuit keep
the handlebar turned leftwards. This is the way
to lift the pump tank and to make easier the
bleeding of the braking system.
If following falls or workshop repairs, the brake
lever stroke is stretchy resulting in insufficient
braking action, repeat circuit bleeding as de-
scribed above.
As the bleeding operation does not fully elimi-
nate the air inside the circuit, the small quantity
of air remaining inside will be eliminated after a
short time of use of the brake. In this case how-
ever, the action of the lever will be harder and
the stroke shorter.
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