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Page 6

SKU 92421

For technical questions, please call 1-800-444-3353

Operation (continued)

Refer to FIGURES 2 and 3 on page 5, and the Assembly Drawing on page 9.
Note: Turn off your air compressor and disconnect the air hose when you are changing

sockets.  After you attach the socket, attach the air hose and turn the air compressor
on.

1.

Select the appropriate size 1” drive socket for your needs.

2.

Push and snap the socket (not included) onto the Anvil (38).

3.

To operate the Forward/Reverse Valve (17) follow the directions in FIGURE 4 below.

 FIGURE 4

Forward

Reverse

The Forward/Reverse Valve (17) has

three forward and three reverse speeds.

Turn the Valve to the right toward the

clockwise arrow to tighten, and to the

left, toward the counterclockwise

arrow to loosen.

Handle

Tightening

Note: Set the Forward/Reverse Valve (17) so that the anvil turns clockwise (forward).

7.

Tighten the nut as tight as you can by hand.

8.

Place the socket (not included) over the nut you wish to tighten.

9.

Grip the Impact Wrench firmly with two hands and gently squeeze the Trigger (13).

Note: If the Impact Wrench cannot tighten the nut to your satisfaction, do not raise the air

pressure on the compressor over 90 PSI.  Pressures above 90 PSI will strip the work-
piece and damage the tool, potentially causing the tool to fail, causing serious injury.
Use other appropriate methods and tools to tighten the nut.

10.

When the nut is tightened, release the Trigger (13).  Turn off the air compressor and
disconnect the hose.

11.

Always  check the recommended torque specification for the nut.  Use a torque
wrench to tighten the nut to the proper setting after using the Impact Wrench.

(Shown without protective coating for clarity.)

Summary of Contents for Earthquake 92421

Page 1: ...stions and replacement parts please call 1 800 444 3353 Model 92421 Copyright 2005 by Harbor Freight Tools All rights reserved No portion of this manual or any artwork contained herein may be reproduc...

Page 2: ...able gases or liquids 3 Keep children away Children must never be allowed in the work area Do not let them handle machines tools extension cords or air hoses 4 Store idle equipment When not in use too...

Page 3: ...tool any part that appears damaged should be carefully checked to determine that it will operate properly and perform its intended function Check for alignment and binding of moving parts any broken...

Page 4: ...g or broken please call Harbor Freight Tools at the number on the cover of this manual as soon as possible For best service you should incorporate an oiler regulator and inline filter as shown in the...

Page 5: ...Case 43 and secure it with four Screws 46 and Washers 46A See FIGURE 1 Operation Warning This Impact Wrench supplies powerful torque and is designed to be operated with two hands Failure to operate t...

Page 6: ...ise arrow to loosen Handle Tightening Note Set the Forward Reverse Valve 17 so that the anvil turns clockwise forward 7 Tighten the nut as tight as you can by hand 8 Place the socket not included over...

Page 7: ...t is loosened release the Trigger 13 Turn off the air compressor and disconnect the hose 15 If needed remove the nut from the socket Maintenance 1 Make sure your Impact Wrench is disconnected from the...

Page 8: ...ORIGINAL PRODUCT OR REPLACEMENT PARTSTHERETO OR ARIS ING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO Parts List Part No Description Qty Part No Description Qty 1 Trigger Handle 1 28 Cy...

Page 9: ...Page 9 SKU 92421 For technical questions please call 1 800 444 3353 Assembly Drawing...

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