Case IH RBX443, Repair Manual

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SECTION 00 - GENERAL INFORMATION - CHAPTER 1
00-12
TECHNICAL INFORMATION
HARDWARE
General
The round balers have been built using mostly metric
hardware. However, there are some places where
inch hardware is required.
NOTE: Be sure to use the hardware specified when
using tapped holes, as trying to install a metric bolt in
an inch thread, or an inch bolt in a metric thread, will
damage the thread.
The standard metric hardware callouts are for exam-
ple M8 x 16. The M indicates metric. The first number
(8) is the diameter in millimeters. The second number
(16) is the length in millimeters. Following the num-
bers there may be a letter designation such as CS
(cap screw) or CB (carriage bolt).
Certain hardware must be tightened to specific
torque specifications. If specific torque specifications
are not noted, tighten the hardware to the standard
torque chart specification listed in this manual.
Plating
Hardware used is plated with zinc chromate (gold
color). Gold colored hardware has different torquing
requirements from unplated or zinc plated (silver col-
or) hardware because of the difference in the coeffi-
cient of friction of the plating material. The torque
charts in this manual list the correct specifications for
gold, silver, and unplated bolts.
Nut Tightening
Whenever possible, the nut should be tightened, not
the head of the bolt. When tightening using the bolt
head, the clamp load can be lost because some of
the torque applied twists the bolt instead of tension-
ing (stretching) it. The tension on the bolt is what
holds the joint together.
Approximately 90% of the torque applied during as-
sembly goes to overcoming friction between the
parts. The other 10% is used to tension (stretch) the
bolt. After assembly, the frictional forces disappear,
which is the basis for the saying “If it does not fail dur-
ing assembly, it will not fail in service.” The bolt may
later fail due to other factors, but not from being over
tightened.
Locknuts
Most locknuts are coated with a special lubricant that
is dry to the touch. Anytime a locknut is used, a lower
than normal torque is required. Refer to the torque
charts in this manual for specific values.
Jam Nuts
When using a jam nut to lock a regular nut, the jam
nut should be installed first and tightened to one half
the recommended torque, then held in place while
installing a regular nut to the recommended torque.
Thread Lubrication
The addition of antiseize compound, Molykote, oil,
graphite, or any other lubricant to a bolt decreases
the friction between it and a nut. This makes it neces-
sary to reduce the recommended torque to prevent
over tensioning of the bolt. When using the torque
charts in this manual, decrease the value by 20%
whenever a lubricant is used.
Tapered Splines
In an installation where a component such as a fly-
wheel, shaft, gear, etc. is attached to a shaft with
tapered splines and held in place with a washer and
cap screw, it must be hammer seated.
Be sure the splines in both components are clean.
Install the component. Be sure the shaft does not
protrude through the component; if it does, check for
excessive wear in either component. Install the
washer and cap screw. Tighten the cap screw to the
corresponding torque for that bolt size or to the speci-
fied torque for that component.
Strike the hub of the component with a hammer or
use a punch and hammer if necessary. Recheck the
torque. Repeat the process until the torque of the bolt
holds.
NOTE: The washer must not bottom out on the shaft
before the component is tight.