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D9WL2 / D9WL5
Replace the suction valve:
• Unscrew the suction valve locking nut.
• Release the suction valve by pulling it through the middle of the injection
assembly
Replace the dosing pump body O-ring:
• Completely unscrew the dosing locking nut
• Release the snap ring by spreading the lugs.
• Remove the dosing body by pushing it through the sleeve
• 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.
• 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 and its locking nut.
Replace the injector sleeve O-ring:
• Follow the method explained above.
Replace the dosing piston seal:
• Replace the dosing pump body O-ring following the method described
above.
• Clean the seal seating without any tools.
• Reassemble by hand. It is extremely important that the seal is not twisted
once it is in place, as this would compromise the seal.