Petsafe Drinkwell Big-Dog Pet Fountain Manuel D'utilisation page 8

Motor Removal & Cleaning
7)
a) Turn the bowl over and unlock the motor from its cavity by
slipping your finger into the indentation behind the motor
and pulling that end of the motor out toward you, so that it
has turned a quarter of a turn (See Fig. 6). Do not attempt
to remove motor without turning it 90 degrees, this may
damage the fountain and cause a leak.
b) Now that the motor is unlocked, remove it from the fountain.
If you find this difficult, you can push the motor out from the
bowl side.
c) Carefully lift the impeller (the white "propeller") out of the
motor. It should slide out with no resistance. Remove any
hair tangled around it and wash it with the rest of the parts.
d) Pour soapy water inside the motor cavity and clean it with a
small round bristle brush (Cleaning Kits are available). Rinse
well and replace the impeller after it is cleaned.
Fig. 6
8) Hand wash the rest of the fountain parts in soapy water and
rinse well. You may place items in the dishwasher, but if your
dishwasher is too hot - the plastic parts can be damaged. Use
a longer bristle brush to clean the square intake tube in the
filter housing. (See Fig. 7) The reservoir is not dishwasher
safe.
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Fig. 7
Square Intake
Tube