The power seat is moved forward and
rearward and up and down by reversing the
rotation of the motors which drive the
screw-jack type adjusters.
The horizontal adjuster is fastened at one
end to a bracket mounted on the floor pan
of the body. The other end of the adjuster is
attached to the seat frame which rides on
the track assemblies bolted to the body
floor.
When rotation of the screw-jack causes it to extend, the seat is pushed
forward; when reverse rotation causes it to retract, the seat is pulled
backward.
A horizontal bar, pivoted at each end at the
lower seat track, equalizes the forward and
rearward motion of the right and left track
assemblies.
The vertical adjuster is attached at the front
end to a bracket on the seat frame. The
other end is fastened to a cam link and
levers which join the upper and lower seat
tracks.
When the screw-jack extends, its thrust is
converted into vertical movement by the
cam link and levers, thus raising the seat.
When the screw-jack retracts, it causes the
seat to descend.
An assist spring aids in raising the seat. A
bar, fastened to the upper seat tracks,
equalizes the up and down movement of the
right and left track assemblies.
PRINCIPLES OF OPERATION
