Locking devices, where specified, must be fitted. If the efficiency of a locking device is
impaired during removal it must be renewed.
This applies particularly to micro-encapsulated fixings which must always be replaced if
disturbed.
Where necessary, the text in this manual will indicate where such a fixing is used.
Use of Crow Foot Spanner Adapters with Torque Wrenches
The use of a crow foot spanner adapter will effectively lengthen the lever arm of a
torque wrench. The amount of torque applied to a fastener is increased as the torque
wrench lever arm is extended, therefore the torque wrench setting must be adjusted in
order to achieve the correct tightening torque.
Before tightening a fixing using a crow foot spanner adapter, measure the normal length
of the torque wrench from the centre of the drive square to the centre of the handle
(dimension L1). Fit the crow foot spanner adapter to the torque wrench as shown below.
Measure the extended length of the torque wrench from the centre of the crow foot
spanner head to the centre of the handle (dimension L2).
Use the following formula to calculate the correct torque wrench setting to achieve the
required tightening torque.
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