Husqvarna K3600 Mk II Workshop Manual page 48

M5
VALVES
Brake valve
Function
The main task of the brake valve is to quickly slow the rotation of the blade
once the start control has been released. This function is particularly impor-
tant on the K2500 with its practically friction-free transmission system.
Without a functioning brake valve, the blade on the K2500 would rotate even
with the start control in stop position. (An explanation of this can be found
on page 30.)
Problems with the brake valve are practically unheard of. However, some -
times it is a component that mechanics forget to re-fit!
Inspection
From the position of the main
valve: Push the valve towards the
spring.
Pressure hose position:
Insert a Philips screwdriver.
Removal
The brake valve has an M5
thread and is pulled out using a
screw.
Inspection
Check that the units are free
from external damage/corrosion
and contaminants. Check that
the centre hole is open.
Inspection
Movement of the brake valve can be
checked in two ways:
From the position of the main valve:
With the hydraulic motor cover and the
main valve removed, the brake valve
becomes accessible. Push it towards the
spring using a screwdriver.
Pressure hose position:
It is best to test the brake valve from the
pressure side of the hydraulic motor as
the hydraulic hose has been removed.
Insert a Philips screwdriver and test valve
movement.
If the inspection is done in this way,
the brake valve should be removed for
inspection at the same time.
Removal
The brake valve has an M5 screw thread
in the end towards the hydraulic hose.
Screw a long screw into the brake valve
and pull out the complete unit.
If the spring does not come out, this
can easily be removed using a magnetic
driver.
Inspection
The valve and the spring must be free
from external damage/corrosion and
contaminants. Check that the centre hole
of the brake valve is open.
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