Medela lactrina, Service Instructions Manual

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2.1.4 Dismantling
Important:
Before taking off the back of the Lactina
®
housing for service purposes,
do not forget to switch off the pump and to disconnect the power cord
from the mains supply
Gearbox unit:
– Remove the back (20) after releasing the screws (15 and 19)
– Release power cord with cable tension relief (16 to 18) from the
back (20) and gearbox unit (11)
– Turn the gearwheel until the pumping arm (2) is swung in fully
– Swing out the pumping arm (2) fully by hand
– Lock the return spring by inserting the spring holder (14)
obtainable from Medela in the slot provided for this purpose (see
exploded view diagram)
– Swing in pumping arm (2)
– Withdraw bearing pin (12)
– Swing out pumping arm (2) again fully
– Detach electrical connections on right-hand side from main
terminal and withdraw
– Remove gearbox unit (11)
Electronics:
– Remove gearbox (11) as described above
– Compress retainer of switch case and press out switch (21) from
inside to outside
– Remove SPS red + blue connections from switch (21)
– Disconnect motor leads from switch (21)
– Withdraw LED (D1) (fuse holder 9/10 + 23 is also preferably
dismantled beforehand)
– Detach SPS cable (24) from its holders
– Remove cover (28) from knob (26 + 27)
– Release screw in knob (26 + 27) and remove knob
– Release nut under knob (26 + 27) and draw off
potentiometer inwards
– Swing in pumping arm (2) fully
– Hold pump case (5) by handle and withdraw SPS (24) with
other hand
Pump arm:
– Remove gearbox (11), preferably also SPS (24) according to
description above
– Dismantle cover insert (7) after releasing the screws (8)
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