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Heel too hard
Symptoms
• Rapid heel to toe movement
• At initial contact the amputee has poor control of his prosthesis
• Minimal energy return feeling
• Knee may become unstable
Action
• Replace heel wedge with a smaller one.
• Shift socket posterior or foot anterior.
HEEL WEDGES CM150011 (Figure 4)
The wedge can influence the heel to toe function. Start altering the heel
resistance to improve foot response by adding a heel wedge. The 2°, 4° &
6° wedges can be interchanged to customize the stiffness and achieve
the desired functional characteristics. A combination of wedges may be
used
1.
2° – yellow
2.
4° – red
3.
6° – blue
Temporary Wedge Placement
• Cut the wedge to the width of the foot module.
• Roughen the upper and lower surface of the wedge with abrasive
paper.
• Place the wedge in the angle of heel and foot module.
• Secure in position bond to upper surface (Figure 4) with tape wrapped
around the foot module (Figure 5).
Permanent Wedge Placement
• Apply adhesive on the upper 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 ASSEMBLY
If it is necessary to replace the heel component or heel bolts use Loctite
410 and torque to the following specifications:
Category
1-6
7-9
Note: After service the bolts should be tightend, allowed to set for a few
minutes and then tightened again. A biannual inspection of attachment
bolts is recommended:
Check for corrosion and sign of wear. Replace bolts if needed.
Bolt Size
1/4"
5/16"
Heel Bolt Torque
14 Nm (10ft-lbs)
28 Nm (21ft-lbs)
6
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