9 Fitting Advice
Springs are supplied as matched sets i.e. the blade/toe and heel springs are designed to work
together to give smooth progression for most users.
Heel Wedge
A heel wedge is supplied with the foot. Fitting the wedge will have the effect of stiffening the
heel spring. These can be taped in place for trial. For permanent fitting, wedges should be
adhered in place by application of Loctite 424 (926104) between the lower contacting surface of
the heel and the wedge.
Heel Stiffness
Progression throughout the stance phase should be smooth; heel function is key to this process:
• Too soft a heel or load line excessively posterior will result in sinking at heel strike and
difficulty in getting over the toe.
• Too hard a heel or load line excessively anterior will result in a rapid progression through
mid-stance or jarring at heel strike.
Heel too soft
Heel too hard
Toe/ Blade too soft
Please contact your supplier if it is not possible to achieve a smooth gait after following the
advice above.
Symptoms
• Sinking at heel strike
• Difficulty climbing over the
toe (toe feels too hard)
• Rapid transition from heel
strike through stance phase
• Difficulty in controlling heel
action,
foot jars into mid-stance
• Foot feels too rigid
• Rapid progression through
mid-stance.
• 'Drop off' at higher Activity
Levels
1.
Move socket anteriorly in
relation to the foot (excess
movement may result in drop
off )
2.
Add heel wedge
1.
Remove heel wedge (if fitted)
2.
Move socket posteriorly in
relation to foot
1.
Move socket posteriorly in
relation to foot
2.
Plantarflex foot slightly - note:
some
re-alignment may be required
11
Remedy
938295S/2-0120