Husqvarna Rider ProFlex 21 II Workshop Manual page 84

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Control Valve Replacement
1. Lower the cutting unit to the ground.
Stop the engine.
2. Remove the plastic cover from the
hydraulic valve block.
3. Clean, see Working Methods on
page 78.
4. Hold the valve block nipples in place and
loosen the hydraulic connectors from the
control valve. A small amount of oil will
leak out.
5. Remove the hose nipple from the top
part of the valve.
6. Remove the Allen screws and spacing
tubes and remove the control valve from
the valve block. Keep track of the two o-
rings that are between the control valve
and the valve block.
7. When replacing the control valve, move
the nipple, including the rubber/steel
washer for the forward hose, to the new
valve. Keep in mind that this nipple is to
be equipped with a throttle, which the
other nipple lacks.
8. Fit the o-rings into the valve and replace
the valve in the valve block with the Allen
screws fitted with spacing tubes.
9. Refit the nipple without the throttle with
the washer in the connector for the upper
hose.
10. Connect the hydraulic connectors. Twist
the hoses so that they do not chafe
against any sharp edges. The upper
hose on the valve shall run to the forward
cylinder connector and be pointed
forwards so that it is free from the cover.
11. Remove the transmission cover and top
up with transmission oil. Be observant
when running the engine and top up so
that the tank is not emptied.
12. Test run and bleed the hydraulic system
of excess air.
13. Replace the removed covers.
Control Valve, Disassembly/Assembly
1. Remove the control valve, see above.
2. Clean in accordance with Working
Methods on page 78.
3. Place the valve in the vice. Tighten down
on the lower part (under the slider hole).
4. Remove the check valve. Set the tool to
the wide wrench setting, 15 mm.
82
English-
HYDRAULIC SYSTEM
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Plastic cover
Control valve
Oil tank
Check valve
8009-374
8009-388
6012-057
8009-389