Motion Pro 08-0134 - Manual (Page 2)

NOTE: When using 3 inches for distance “A”, torque wrench and torque adapter must be in line.
If the adapter is positioned at an angle to the torque wrench, distance “A” will be decreased. When
the adapter is at a 90-degree angle to the torque wrench, distance “A” will be equal to zero (0).
Example: To tighten an engine’s cylinder base nuts to 20 ft.-lb. with the torque adapter, and a torque wrench with a lever length
of 12 inches, compute the extension formula as follows:
1. List all of the known formula variables:
2. Plug-in each of the formula variables
into the extension formula:
3. Thus, you can solve the formula as follows:
Solution: In this example, your torque wrench would register 16 ft.-lb., but the cylinder base nuts would be tightened to 20 ft.-lb.
TORQUE ADAPTER EXTENSION FORMULA
To recalculate a torque specification when using the
Motion Pro Torque Adaptor, use the following formula:
I08-0134 042009
Corrected torque reading =
Torque required x wrench length
Wrench length + extension length
T = Actual torque reading as listed in the service manual.
L = Torque wrench lever length. This is the lever length of your torque
wrench — center of grip to center of drive (see drawing). Refer to
the instruction sheet that came with you torque wrench on how to
determine this length.
A = Torque adapter extension length. When using the Motion Pro Torque Adapter,
the torque adapter length is 3 inches (see note below).
R = Corrected torque reading (indicated torque value to set on torque wrench).
R =
T x L
L + A
A L
T = 20 ft.-lb. (actual torque specification)
L = 12 in. (torque wrench lever length)
A = 3 in. (torque adapter extension length)
R =
R = 16 ft.-lb.
=
T x L 20 x 12
L + A 12 + 3
20 x 12 240
12 + 3 15
= =