TM 5-3810-307-24-1-1
The following types of Loctite brand adhesives are
lubricant, plating, or other factors that might require
available from Grove Worldwide, Product Support.
variation from standard torque values.
When maximum recommended torque values have
Loctite Number
Grove Part Number
been exceeded. the fastener should be replaced.
277
9999100806
When referring to the applicable torque charts, use
242
9999100805
values as close as possible to the torque values
592
9999100804
shown to allow for wrench calibration tolerance. An
erratic or jerking motion of the wrench can easily
FASTENERS AND TORQUE VALVES.
result in excessive torque. ALWAYS use a slow
Use bolts of the correct length. A bolt which is too
wrench
movement
and
STOP
when
the
long may bottom before the head is tight against the
predetermined value has been reached.
part it is to hold. If a bolt is too short, there may not
be enough threads engaged to hold the part securely.
Torque wrenches are precision instruments and are
Threads can be damaged. Inspect them and replace
to be handled with care to ensure calibrated
fasteners, as necessary. Hardened flat washers
accuracy. Calibration checks should be made on a
must be used with high strength fasteners (Grade 5
scheduled basis. Whenever the wrench might be
and 8). Be sure a hardened flat washer is installed
either over stressed or damaged, it should
under the end to be rotated/torqued.
immediately be removed from service until
recalibrated.
Torque values should correspond to the type bolts,
studs, and nuts being used.
KNOW YOUR TORQUE WRENCH! Flexible beam
type wrenches, even though they might have a
The torque tables in this section are provided by
preset feature, must be pulled at right angles and
Grove Worldwide for reference when performing
the force must be applied at the exact center of
maintenance. These tables shall be followed unless
the handle. Force value readings must be made
specific values are cited in the detailed maintenance
while the tool is in motion.
instruction.
Rigid handle type torque wrenches are available
Use of proper torque values is extremely important.
with torque limiting devices that can be preset to
Improper torquing can seriously affect performance
required values and which eliminate dial
and reliability. Identification of fastener grade is
readings.
always necessary. When marked as a high strength
NOTE
part (Grade 5 and 8.), the mechanic must be aware
that he is working with a highly stressed component
and the fastener should be torqued accordingly.
Metric tools may be marked using either
Newton-meter (N-m), or kilogram /meter
NOTE
(kg/m) units. To convert pounds-foot of
torque to
metric units, multiply the
Some special applications require
pounds-foot value by 1.36 for the (N-m)
variation from standard torque values.
equivalent, or multiply by 0.014 for the
Reference should always be made to
(kg/m) value,
component overhaul procedures for
NOTE
recommendations.
Special attention should be given to the existence of
When multiplier and/or special tools are
used to reach hard to get at spots,
ensure torque readings are precisely
calculated.
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