Grizzly G3690 instruction manual Troubleshooting, Testing After Assembly

IX. MAINTENANCE

D. TESTING AFTER ASSEMBLY

To initially test the gun after a repair pro- cedure:

1.Put on your safety glasses, reduce the regulated air pressure to 30 PSI. Do not put any fasteners into the magazine. Connect the air hose.

NOTE: It is important to reduce the ini- tial test pressure so that damage to the gun does not occur when firing without any fasteners in the magazine.

2.Check for any leaking air. You will hear it hissing or feel it rushing through the spaces.

3.If everything sounds normal, press the safety nose down on a piece of wood and pull the trigger a couple of times. Air should be exhausted normally each time.

4.Disconnect the air hose. Adjust the regu- lated air pressure back up to the mini- mum required to set your fasteners. Load the magazine with recommended fasten- ers.

5.Re-connect the nail gun to the air supply.

6.Press the safety nose on a suitable test material and pull the trigger. If the gun is still not working properly, re-check your repair procedure or call the appropriate service location for advice.

See Section VII.D and VII.E. for more infor- mation about testing and routine use.

X. TROUBLESHOOTING

This section covers some other potential prob- lems and possible causes. If you have taken the gun apart before, as in the above section, you will realize that most problems can be repaired on the job site with a few basic parts. If you are heavily dependent upon this tool for production work, it makes good sense to have an O-ring repair kit and a complete driver unit on hand just in case a problem does develop.

The following list describes some potential problems and solutions.

1.LEAKS: A leak can usually be fixed by simply loosening and retightening the cap screws on the gun cap symmetri- cally or providing more lubricant to the O-rings.

2.If the driver does not return to its starting position, then the main piston O-ring may be worn or broken.

3.If air constantly leaks at the exhaust port, then the head valve piston O-ring may be worn or broken.

4.If air constantly leaks at the trigger, then the trigger system O-rings may be worn or broken.

5.If the gun misfires or over-drives the fas- tener into the workpiece without manual- ly changing the air pressure, then the bumper may be worn or broken.

6.If the wrong type of oil has been used for lubrication, O-rings may swell and dis- lodge from their grooves. This could cause leaks anywhere in the gun.

Again, if you have a problem and would like assistance, please call the appropriate service department. They will be glad to assist you.

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