Group 08, Section 15, Page 2 Mechanical Dock Leveler – M and FMC
Issue Date: 10/01/01, Rev, 0 (Part #038-550E)
LIP CROWN MODIFICATION
Increasing Lip Crown –
cont’d
Figure 91, illustrates the same situation
as Figure 90 with the lip modified for
additional crown. Note that the tip of
the lip is now making contact with the
truck bed but that a hang-up point has
been created.
TO INCREASE LIP CROWN -
Proceed As Follows:
The thickness of the material added is
determined by the amount of additional
crown required. The full width of the lip
must be built up so that the load is
equally distributed across the entire
width of the headboard. An unbroken
bead of weld may be used in place of
adding material. Two or more
continuous welds may be required,
depending on the amount of additional
crown required.
When a weld bead is used as build-up
material, deposit slightly more depth
than is required and then remove the
excess material with a grinder. This
will assure an equal thickness of
build-up across the full width of the lip
with no high or low areas, and will
distribute the load equally across the
full width of the headboard.
When the desired lip crown is
achieved, position the dock leveler onto
a truck bed and place sufficient weight
on the deck to force the lip fully against
the headboard. Inspect the mating
area of lip and deck, and lightly grind
off any sharp edge that may have been
created by the change of crown. With
increase of crown this will be the upper
rear edge of the lip and will contribute
to hang-up if not removed. Do not
over-grind, remove only the sharp
edge.
Figure 91
Figure 92
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