Husqvarna TE 310-450-510 210 I.E. Owner's Manual page 158

FRONT BRAKING SYSTEM BLEEDING (SMR)
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 (bleeding valve 1), then
the brake caliper (bleeding valve 1A).
In both cases, proceed as follows:
- Remove the rubber cap on the bleeding valve (1) or (1A).
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- Attach a clear plastic hose to the bleeding valve on the brake
caliper and turn the other end of the hose into a container
(make sure that the end of the hose is submerged in brake
fluid during the entire bleeding operation).
- Remove fluid reservoir cap (2), the rubber and fill the reser-
voir with fresh brake fluid.
- Open the bleeding valve and pump with brake lever several
times until the fluid, clear and without bubbles, comes out of
the hose: now close the bleeding valve.
1A
SMR
SMR