Case IH FARMALL 30B, Руководство по обслуживанию, Страница: 28 / 41

INTRODUCTION
NOTE: Fasteners should be replaced with the same or higher grade. If higher grade fasten-
ers are used, these should only be tightened to the strength of the original. When replac-
ing cap screws, always use a cap screw of the same measurement and strength as the cap
screw being replaced.
NOTE: Make sure the fasteners threads are clean, and that thread engagement is started.
This will prevent them from failing when being tightened. Assure that joints that utilize
threaded fasteners are properly tightened, and that they remain tight during the period of
their intended usage.
NOTE: Tighten plastic insert or crimped steel-type lock nuts to approximately 50 % of table
torque, applied to the nut, not the bolt head. Tighten toothed or serrated type lock nuts to
their full torque value.
NOTE: Always use the torque values listed in the supplied charts in this section when val-
ues are not supplied in a procedure.
NOTE: DO NOT use these torque values when values are given in a specified procedure.
NOTE: Reuse of fasteners. Fasteners that have been tightened above yield point during
assembly should not be reused after disassembly. They have been permanently deformed
and the elastic range has been shifted closer to the ultimate tensile point.
NOTE: Torque and Turn is a recommended procedure for manufacturing and service when
sophisticated tools are not available, especially for large diameter fasteners.
NOTE: Large diameter fasteners, unless specifically stated, should be tightened in
sequence using the related torque chart below, at a low torque that is sufficient until the
joint is closed. Each bolt is then rotated 90 degrees in sequence. Each bolt is then rotated
another 90 degrees in sequence. The result is a clamp load above the yield point. This
procedure results in a consistent clamp load. The fasteners should not be reused after
disassembly.
df5019-1
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NOTE: Shown above is the suggested initial torque tightening sequences for general applications, tighten
in sequence from item 1 through to the last item of hardware.
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