An impact wrench is a tool powered by compressed air or electricity. The high-torque action of the impact wrench can loosen bolts or nuts -- such as those on vehicle wheel studs -- that would normally be very difficult, if not impossible to remove by hand with a ratchet wrench. Electric impact wrenches usually have a sealed motor, but air impact wrenches have moving parts that must be lubricated periodically.
Things You'll Need
- Light motor oil
Disconnect the air hose from the wrench by pushing the collar fitting on the air hose away from the tool while pulling the air hose straight out of the tool.
Hold the tool with the air inlet -- usually located in the bottom of the hand grip -- facing upward.
Squeeze the trigger and hold it in.
Squeeze one or two drops of light motor oil into the air inlet hole.
Release the trigger. Wipe up any spilled oil from the exterior of the tool with a rag.
Tips & Warnings
- To keep from having to manually oil your impact wrench, install an inline oiler between the air compressor and the air hose used to supply air to the tool. A small reservoir allows the right amount of lubricating oil to travel through the air line to the tool. Top off the reservoir with oil regularly to ensure the supply does not run out while using the impact wrench.
- Use only sockets and extensions designed to be used with impact wrenches. Standard sockets and extensions can shatter if used with an impact wrench, possibly causing severe injury to the user and to bystanders.
- Never operate an impact wrench at a higher air pressure than the tool can handle. Consult the owner's manual to determine the wrench's maximum allowable air pressure.
How to Check Your Oil
Modern cars don't use much oil. You may not have to add any between oil changes, but you should check it every...
How to Use an Impact Wrench
An impact wrench may not be thought of as a basic, everyday tool, but it can sure make quick and easy work...
How to Adjust the Torque on an Impact Wrench
The hammering action of an impact wrench makes life easier when loosening stubborn nuts and bolts. Using one to tighten a fastener...
How to Oil an Ingersoll Rand Air Impact 231C
The Ingersoll Rand 231C series is the latest generation of air impact guns from the Rand Company as of 2010. To oil...
How to Troubleshoot an Air Impact Wrench
Air impact wrenches are designed for heavy-duty maintenance and fastening work. The tools tend to have multiple forward and reverse power levels...
What Type of Oil Do I Use for an Air Wrench?
Air wrenches, also called pneumatic wrenches, require regular lubrication to prolong their life and enhance their performance. Like car engines, air wrenches...
How Much Oil to Put in Pnuematic Air Tools?
Keeping your pneumatic air tools oiled properly is one of the easiest things you can do to keep them working at their...