You would remove the plug from the front of the hammer case and add a high quality grease specifically for impact wrenches. Alternatively, daily, add 10-15 drops of 10-weight air tool oil directly into the air inlet before use to maintain the internal components.
AIRCAT Air Impact Wrench, 1/2in. Drive, 800ft./lbs. Torque, Model# 1431

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- 1/2in. impact wrench delivers 800 ft./lbs. of nut-busting torque
- Twin hammer mechanism delivers maximum power and long life
- Ergonomically designed grip perfectly fits the hand, providing superior user comfort
- Cross bolt forward/reverse and power management control provides excellent control
- Triple heat-treated Ni-Cr-Mo alloy steel hammer mechanism and anvil provide ultimate reliability
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