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REPLACING THE INJECTION SEALS
Frequency: at least once a year.
Contact DOSATRON, or a dealer to select the appropriate seal kit for your
dosing pump.
Dismantle the injection assembly in accordance with the instructions in the
Removing/Refitting the injection assembly section, page 44.
ATTENTION! Do not use metal tools or utensils.
D9WL3000
Replace the suction valve:
• Unscrew the suction valve locking nut.
• Release the suction valve by pulling it through the middle of the injection
assembly (the suction valve is made up of 2 parts: hose connector + valve)
Replace the dosing pump body O-rings:
• Completely unscrew the dosing locking nut
• Release the snap ring by spreading the lugs.
• Remove the dosing body by pushing it through the sleeve
• Unscrew the upper part of the dosing pump body
• Remove the seal from the lower part of the dosing body and replace it.
• Screw the upper part of the dosing body back on by hand.
• Using your thumb and forefinger, pinch the component and the seal; push
towards the other side to distort the seal.
• Continue until you can grip the protruding part of the seal, then pull it out of
the groove and replace it.
• Refit the dosing pump body into the injector sleeve using the centring pins.
• Refit the snap ring, ensuring that it is correctly positioned in its groove.
• Retighten the dosing locking nut completely.
• Finish by refitting the suction valve (make sure it is fitted in the right direction)
and its locking nut.
Replace the injector sleeve O-ring:
• Follow the method explained above.
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