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13
and mark the position for the placement of the vertical
section of the shoe.
Axis of rotation
for gate leaf
Centerline of
gate leaf
Vertical section can be
located on either side
of axis of rotation
Minimum of
3/4 in. (1.9 cm)
Recommended minimum of 10 in. (25 cm)
Thickness
of the
gate leaf
Bottom of
U-shaped
section
Absolute minimum of 5 in. (12.7 cm)
between vertical section and end of
U-shaped section
Figure 10. Top view of the U-shaped section of the gate leaf shoe
Next you need to position the splined collar (or the
shear-pin assembly) on the bottom side of the U-shaped
section of the shoe as shown in Figure 9. In positioning
the splined collar, meet the following two requirements:
1.
On the bottom of the U-shaped shoe section,
accurately center the sleeve around the pilot
hole that marks the axis of rotation. Accuracy
is important.
2.
Center one notch on the sleeve along the
centerline of the gate leaf (see Figure 11). You
can then align this centered notch with the
punch mark on the splined shaft of the pinion
as a reference in case you ever need to remove
the shoe later.
Caution:
NEVER
weld the splined shaft of the pinion
to anything.
Spot-weld the splined collar into place on the bottom of
the shoe's U-shaped section. If you are using the shear-
pin assembly, spot weld the splined collar to the bottom
of the shear-pin assembly, and spot weld the top of the
shear-pin assembly to the bottom of the shoe’s U-
shaped section. (You must still meet the two alignment
requirements noted above even if you are using the
shear-pin assembly.)
Next you must test the temporarily welded position of
the sleeve. Fit the sleeve over the splined shaft with the
U-shaped section aligned in the gate leaf's fully closed
position. Verify that the axis of rotation falls through
thehinge(s), the pilot hole, and the center of the splined
shaft.
Align one notch on the sleeve
of the splined shaft with the punch
mark on the splined shaft itself
Gate post end of the gate leaf shoe
Figure 11. Center one notch along the
centerline of the gate leaf shoe and place over
the punch mark on the splined shaft
If the axis of rotation alignments are correct, then
permanently weld the sleeve for the splined shaft to the
bottom of the U-shaped section of the shoe.
Also, you now need to weld the pilot hole closed, and
you need to weld the vertical section of the shoe to the
U-shaped section of the shoe.
Lubricate the splined shaft with grease and place the
finished gate leaf shoe assembly over the shaft in the
closed position.
Содержание 760
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