Continental Refrigerator IO-240-A, Installation And Operation Manual, Page: 117 / 146

IO-240 Series Engine Installation & Operation Manual B-3
31 October 2011
Torque Specifications
B-3. Torque Wrench and Extension Calculations
Torque wrenches measure the force applied to the fastener on the axis of the square drive
socket adapter.
Figure B-1. Torque Wrench
Straight extensions and wobble extensions up to 15 degrees, which extend the square drive
length, do not alter the amount of force applied to the square drive enough to cause
concern. An offset adapter may be used with a torque wrench without affecting applied
torque if the extension is positioned at a 90 degree angle in relation to the square drive
adapter. In any other orientation, the extension alters the force applied to the fastener.
Figure B-2. Drive extensions
Apply the formula below to determine the appropriate torque wrench setting when using
an extension:
S=
T
x A
Where:
S = desired torque setting or reading
T= torque applied at square drive adapter
A= length of handle in inches
B= length of extension in inches
A + B
Squ
are
Driv
e
Force
Torque Setting/Reading = Force x Distance
Torque Wrench Square Drive Distance = A
Squ
are
Driv
e
Force
Torque Setting/Reading = Force x Distance
Torque Wrench Square Drive Distance = A
90°
90°
Set Torque = Fastener Torque
90°
90°
Set Torque = Fastener Torque
15°
If angle ≤ 15 °
Set Torque = Fastener Torque
15°
If angle ≤ 15 °
Set Torque = Fastener Torque