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Step 9. Carefully remove the seat
core from the mattress cover. Pull the
mattress cover over the screws while
pulling out the core. Inspect the core
for damage or contamination.
Step 10. Carefully remove the back core
from the mattress cover. Inspect the
core for damage or contamination.
Step 11. Carefully remove the core of
the foot section from the top cover. Pull
the top cover over the screws while
removing the core. Inspect the core for
damage or dirt.