General-Torque Values; Definitions; Torquing Requirements - Cub Crafters CC18-180 Maintenance Manual

CUB CRAFTERS, INC.
CC18-180 MAINTENANCE MANUAL

1. GENERAL-TORQUE VALUES

This chapter gives the requirements for torquing the fasteners on the CC18-180.
No lubricating or anti-seize compounds are to be applied to threaded fasteners except when
specified. At the time of installation, the threads must be clean and free of corrosion, paint or
any products other than those applied by the fastener's manufacturer.

2. DEFINITIONS

Running torque: The average torque developed after the fastener is at least one full thread
through the nut, but prior to the tightening of the joint (also called self-locking torque, locking
torque, friction drag torque).
Assembly torque: The torque required by Design Engineering in order to create the desired axial
load on the bolt/nut assembly (also called tightening torque, installation torque).

3. TORQUING REQUIREMENTS

Whenever possible, the nut shall be turned during torquing.
Where it is necessary to tighten the fastener assembly from the head, the installation torque
shall be the maximum torque indicated in Chapter 20-00-7 + 10 percent.
(Note: This is only applicable for fasteners greater than 3/16" in diameter).
When nuts are to be secured to fasteners by means of cotter pins or lock wire, the low side of
the specified torque range shall be approached for tightening. If necessary, tightening shall be
continued until the next slot aligns with the hole.
Nuts shall not be loosened to obtain the required alignment.
The maximum torque shall not be exceeded.
Threaded fasteners which have been torqued above the maximum value specified shall not be
backed off and retorqued but shall be removed, rejected and rendered unserviceable.
If there is doubt that a fastener has been under-torqued, the nut shall be backed off one
complete rotation (360°) maximum and retightened to the specified value; the bolt, screw or stud
must not be allowed to rotate.
20-00
Manual number TC10000AMM
Page: 2 Date: 05/20/08