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Inserting Batteries

1. Pull the small tab in the middle of the cap towards you.  The 

indicator will change from 

green

 to 

red

.

2. Push down on the cap and slide it to your right.  Both indicators  

now show 

red

.

  Lift the cap to open.

3. Insert the battery, aligning the 

red

 dots.  Be sure to properly fold   

down the top portion of the battery label to ensure water  
tightness.  Also, be sure the gasket on the bottom side of the  
cap is clean and free from dirt and debris. 

4. Close the battery compartment by pushing the cap down and 

sliding it to the left.  The indicator shows 

green

.

5. Push the small locking tab in the center of the cap forward.  The  

indicator will now show 

green

 and the compartment is securely  

closed.

FREEDOM INNOVATIONS

Charging Batteries

For optimal performance, alternate batteries every day. To charge, align the 

red

 dot on the battery with the 

red

 dot on the charger.  A 12V car charger is

also included.

The Status LeD will illuminate 

red

 if the charger has power.  The Charge LeD 

will illuminate 

red

, indicating the battery is charging.  When the battery is 

completely charged, the LeD will illuminate 

green

. If the Charge LeD stays 

red

 for more than four hours, this indicates that the battery is either damaged 

or worn out.  The temperature of the battery should be kept between 8 °C 
and 38 °C (46 °F to 100 °F) while charging.   If the temperature goes outside 
this range, the Charge LeD will shutoff indicating that charging was stopped 
before the battery was fully charged.

Battery Cap Closed

Adjustment of Swing Flexion Resistance

The Plié®3 MPC Knee provides swing flexion resistance to limit 
heel rise during walking.  excessive heel rise limits your ability 
to walk at variable cadences.  The swing flexion resistance can 
be increased or decreased by changing the air pressure in the 
hydraulic cylinder. A higher air pressure provides more swing 
flexion resistance and is more effective for limiting heel rise.
Over time, the air pressure in the hydraulic cylinder will decrease, 
resulting in a performance change.  To ensure the knee provides 
appropriate swing flexion resistance, periodically check the air 
pressure and add as needed.

To check the air pressure in the hydraulic cylinder, remove the 
plug by pushing in the white release ring and pulling on the soft 
plastic tab on the side of the plug.  Attach the air pump by gently 
inserting the tip of the adapter into the port. Push the pump 
adapter tip gently and firmly into the port, it will stop when fully 
inserted. Using the air pump, increase the air pressure to the 
value recommended by your prosthetist.  If you add too much air 

pressure, it can be decreased by pressing the air pump relief valve under the gauge 
on the pump.  The knee should be used with the air pressure between 20 and 100 psi 
(140 to 690 kPa).  Remove the air pump by pushing in the release ring and gently 
pulling the tip out of the port. Insert the air plug, pushing firmly and gently until
it bottoms out.

The pump’s pressure gauge always indicates the air pressure inside the knee. However, 
when the air pump is connected, about ½ of the pressure in the knee will flow into 
the pump, and the pump gauge will read ½ of what was in the knee.  For example, 
if the pump’s gauge indicates 15 psi at the time it is connected to the knee, the knee 
had about 30 psi of air pressure before connecting the pump.  Air pressure in the knee 
does not drop when the air pump is disconnected.  For example, if the pump’s gauge 
indicates 30 psi before it is disconnected, the knee will still have 30 psi of air pressure 
after disconnecting the pump.  When the air pump is removed from the knee, a sound 
of air leaking may be heard. This sound is air expelling from the pump hose to the 
atmosphere.

except when adjusting the air pressure, the air cap should remain inserted. The air 
cap prevents lint and other debris from contaminating the air valve.  Additionally, the 
air cap acts as a second seal to minimize air pressure loss.

Plié3 Owner’s

 Guide

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