Made in the U.S.A.
FIELD SETTINGS
At that time the operator should stop and replace the shear bolt. Use a ½” by 3” long
bolt. Orthman recommends using a grade 5. A grade 2 bolt can be used, but the opera-
tor must be aware that a grade 2 could shear too easily, and a softer grade 2 bolt may
deform or bend instead of shear off clean. This may deform the shear bolt hole, and
make the bolt difficult to remove. A grade 8 bolt is not recommended, as the shank will
experience damage or bending before a grade 8 bolt will shear.
If the upper pivot bolt or lower shear bolt is tightened up too much they will exert a
clamping load on the main frame that will add resistance to the tail’s ability to trip. It is
important to not over-tighten these two bolts. A good check is to remove the lower shear
bolt, and use a lifting device to rotate the tail upward about the upper pivot bolt. If the tail
will not rotate up, the upper pivot bolt is too tight. When installing the lower shear bolt,
tighten it to the point where the nut will flatten a lock washer. If these two bolts are tight-
ened correctly, the tail should not be loose, but will not have an excessive clamping load.
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