Marco 1000830, Service Manual

Page: 30 / 42

SP9 ServiceManual.docx 06/02/2015 Page 30 of 42
Head Unit Control Board Replacement
Remove the front curved panel, as described previously. It should be possible to achieve sufficient
clearance for removal of the control board without having to disconnect the tubing from the
reservoir.
Disconnect the cable connection from the control board. Remove the adjustment knobs and
retaining nuts from the adjustment pots. Remove the head unit control board from inside the head
unit.
Replace the control board by following the preceding instructions in reverse.
Reservoir and Solenoid Replacement
Remove the front curved panel, as described previously. Disconnect the wires from the solenoid.
Remove the tubing from the bottom of the solenoid and the three tubes from the bottom of the
reservoir. Remove the retaining nuts and silicone spacers from the reservoir.
The solenoid is attached by pushing it in to the silicone mounting seal in the reservoir. Remove the
solenoid from the reservoir by pulling the two apart while twisting them.
When replacing the reservoir or solenoid, follow the instructions above in reverse.
Figure 20.