Replacing Valve Block Transmission - Husqvarna PT26D Workshop Manual

5. Connections can be interchanged. Mark
the hydraulic hoses so that they are
reassembled on the correct connections.
6. Release the hydraulic lines from the valve block.
Fit protective plugs.
7. Remove the valve block's mounting bolts.
8. Assemble in reverse order. Tightening Torques
for hydraulic lines as set out in the table.
Dismantling and reassembly
The flushing valve must only be dismantled if
cleaning is necessary or there is external
leakage. In other cases, replace the entire
valve.
1. Remove the plugs with a groove marked
key handle. Keep track of springs and
spring guides.
2. Pull out the valve slider with a pair of
needle-nosed pliers.
3. Loosen (do not remove) the locking nut
for the pressure limiting valve, key
handle 27 mm. Count the turns and
unthread the pressure limiting valve, key
handle 13 mm. Keep track of spring and
valve cone. When the valve has been
removed, the opening pressure must be
set again after assembly.
4. Remove all other plugs and connections.
5. Clean the block and removed parts
carefully. Blow all channels with dry
pressurised air.
6. Dip the slider into clean hydraulic oil.
Insert it into place and check that it
moves easily.
7. Fit springs with spring guides and plugs.
8. Refit the pressure limiting switch valve's
cone, spring and valve body with default
setting according to turns counted during
dismantling. Fit the lock nut without turn-
ing the valve body
9. Fit remaining plugs and connections.
10. Adjust the pressure limiting valve's
opening pressure.

Replacing valve block transmission

1. Drain the hydraulic tank.
2. Jack up and block the machine
3. Place a container under the valve block
to collect the waste oil.
4. Clean according to the general
instructions.
116
English-
REPAIR INSTRUCTIONS
Flushing valve
Valve slider
Valve block transmission, assembly
8043-188
8043-189
8043-125