Impact Wrenches, Using

Impact wrenches are generally allowed for removing bolts and nuts. However, it is not permitted when working inside an open high-voltage battery. Generally, no impact wrenches are permitted for these procedures.

If the following conditions are met, impact wrenches can be used to install bolts and nuts during repair procedures. This is generally intended for electric or pneumatic-powered impact wrenches.

Requirements:

• Bolts with locking fluid or self-locking nuts must be installed using only low speeds.
• Use suitable impact wrenches with adjustable speed and torque ranges.
• Use suitable wrench bits on more sensitive surfaces, for example, use plastic-coated bits on aluminum rims.
• Refer to the Natural Gas Fuel Systems - General Information repair information when performing procedures on natural gas fuel systems.

Application:

• Position bolts and nuts by hand.
• Only screw in bolts and nuts using an impact wrench until the bolt and/or nut head contacts the surface, and then use a torque wrench to continue turning.
• Clean the threaded pins before removing the bolt and/or nut.