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REPLACING THE MOTOR PISTON (WITHOUT PRESSURE)
WARNING: Before performing any work on the DOSATRON, you must
read to the Precautions section, page 17.
NOTA: Before dismantling, and to avoid any contact with the injected
additives, turn on the DOSATRON and allow it to draw in clear water in order
to rinse the injection assembly.
• Turn off the water supply and allow the pressure to drop to zero.
• Unscrew the cover by hand and remove it.
• Remove the motor piston assembly by pulling upwards.
• The rod and plunger piston will follow the motor piston upwards.
• Change and refit the assembly in the reverse order to dismantling.
• Refit the cover, taking care not to damage the seal, and screw it on by hand.
fig 49