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TM 10-4320-324-14
APPENDIX F
TORQUE LIMITS
Section I. INTRODUCTION
F-1. Scope.
This appendix lists torque specifications and torquing instructions for specific engine nuts and bolts.
F-2. General.
Preloading and angle torques are applied.
Section II. TORQUE SPECIFICATIONS
F-3. Torque Specifications.
The application, preloading, and torque angles in degrees are listed in Table F-1.
F-4. Torquing Instructions.
Preloading is applied with a torque wrench that is
calibrated in foot pounds (ft. lbs) or newton meters
(Nm). Preloading is applied before angle torques. All
angle torques listed in Table F-1 are accomplished by
turning the bolt/nut a specific number of degrees from a
zero reference point as shown. The tightening angle is
obtained by turning the handle of the wrench being used
to the desired angle selected from a clock face you
mentally superimpose over the bolt head. Torquing of
two or more bolts securing one assembly should be
accomplished in an alternating fashion to ensure
assembly seating and equal load distribution. For
example, if angle torque specified is 30° initial then 30°
final, proceed as follows:
a.
Coat bolt and surface under bolt head with engine
oil MIL-L-2104.
b.
Set bolts squarely to ensure assembly seating.
c.
Apply specified preload with torque wrench.
d.
Using angle torque meter (Appendix B, Section
III, Item 22) and socket wrench, apply 30° initial torque to
bolt 1.
F-1
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