dosatron D90GL05BPVF, User Manual

Page: 31 / 44

©
DOSATRON INTERNATIONAL S.A.S / 30
CHANGING THE SEALS IN THE DOSING ASSEMBLY
Frequency: at least once a year.
Contact DOSATRON or a dealer to select the appropriate seal kit for your
dosing pump.
Dismantle the dosing assembly in accordance with the instructions in
§ DISMANTLING/REASSEMBLING THE DOSING ASSEMBLY.
IMPORTANT! Only use appropriate tools; do not use any metal
implements.
Replace the dosing piston seal:
Pinch the seal between your thumb and finger; push it sideways to distort
the seal.
- Increase the distortion in order to take hold of the protruding part of the
seal and then pull it out of its groove.
- Clean the seal seat without using any tools.
- Reassembly must be carried out manually. It is very important to avoid any
twisting of the seal once it is in place as this would impair its watertightness.
- Replace the O-ring on the dosing body (Fig. 23a).
- Implement the method explained above.
- Replace the suction valve:
- Unscrew the suction valve locking nut (Fig. 23c)
- Remove the suction valve by pulling it in the line of the dosing assembly.
- Replace the O-ring on the dosing pump body (Fig. 23d)
- Completely unscrew the dosing locking nut (Fig. 23b)
- Release the snap ring by spreading the lugs.
- Slide out the dosing pump body by pushing it up through the sleeve
- Replace the dosing pump body O-ring following the method described
above.
- Replace the dosing pump body inside the sleeve using the guide groove
and lug.
- Replace the snap ring, ensuring that it is positioned in the groove intended
for it.
- Fully retighten the dosing locking nut.
- Finish by refitting the suction valve and its locking nut.