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3. Securing the Shock Module
To secure the shock module tighten the 3 hex screws (Figure 3b). Start
with the top hex screw and work down by applying 3Nm with a torque
wrench. Perform this sequence twice, since the upper hex screws will
loosen in the first run.
Warning: Overtightening the hex screws can strip threads and cause
shock module to bind.
4. Applying a Permanent Shock Module Setting
To permanently fix the shock module, remove the hex screws one by
one; apply Loctite 243 and 3Nm with a torque wrench. When finished,
re-apply torque of 3Nm on all hex screws. Failing to apply Loctite 243
to the hex screws may result in the shock coming loose.
DYNAMIC ALIGNMENT
Heel Wedges
Heel wedges influence the heel to toe function. Start altering the heel
resistance to improve foot response by adding a heel wedge. The small,
medium and large wedges can be interchanged to customize the
stiffness and achieve the desired functional characteristics. The wedges
can be trimmed using sharp scissors to customize stiffness.
Temporary Wedge Placement (Figure 5)
• Place the wedge in the angle of heel and foot module.
• Secure in position with tape wrapped around the foot module
Permanent Wedge Placement
• Roughen the upper and lower surface of the heel with abrasive paper.
• Apply adhesive on the lower side of the wedge only.
• Locate in the foot/heel junction and position before adhesive sets.
• For split toe feet install the heel wedge then remove a thin slice in the
middle by cutting with a sharp knife through the split in the carbon
foot module (Figure 6).
Instant adhesive is necessary to bond the urethane heel wedge. The
adhesive cures in 15-20 seconds. For removal the adhesive may be
softened by soaking in acetone or cyanoacrylate adhesive remover.
Heel Divider
The heel divider should be placed in the last third of the split heel part. To
secure its position a drop of instant adhesive can be used on one side.
PROTECTIVE FILM ON PYRAMID
The protective film protects the pyramid from scratching. Remove the
film when the fitting is complete.
CATEGORY SELECTION CHART
Please refer to the selection charts below to determine the appropriate
stiffness required according to Össur recommendations.
WEIGHT KG
WEIGHT LBS
Low Impact Level
Moderate Impact Level
High Impact Level
45-52
53-59
60-68
99-115
116-130 131-150 151-170 171-194 195-220 221-256 257-287 288-324
1
1
1
2
2
3
69-77
78-88
2
3
4
3
4
5
4
5
6
89-100
101-116 117-130 131-147
5
6
6
7
7
8
N/A
7
8
8
N/A
N/A
5
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