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If you can see a light on the valve but no functions are
working, the spool must be jammed in the valve. You can try
to unjam it by pushing the spool with a screwdriver while you
activate the function with the joystick (Photo 1). If it
doesn’t
work, the valve is probably defective.
Verification of the spool
PROCEDURE REF# A-TRB-003
Photo 1
TRB2000 with joystick only