Troubleshooting

1. Only use your J-GUN with a factory-specified F/R/L unit. The F/R/L unit is designed to filter out dirt, drain water and lubricate the air motor.

2. Always check and drain the water bowl on your F/R/L unit.

3. Always check and fill up the oil bowl on your F/R/L unit. Set the oil drip to one (1) drop every ten (10) seconds. Using your J-GUN without oil will result in air motor damage. MARVEL AIR TOOL OIL is recommended.

4. Never exceed the maximum air pressure specified on the torque chart supplied with your J-GUN.

5. Check the female coupler on your F/R/L unit’s hose and the male coupler on your J-GUN for dirt. Dirt entering your J-GUN will result in air motor damage.

6. Before connecting an external air supply to your F/R/L unit, check the air pressure gauge and verify that it is set at “zero” pressure. A damaged air gauge will result in inaccurate torque.

7. Check the air hose for leaks. An air leak will result in inaccurate torque.

8. Check your J-GUN’s gear box for loose or missing screws. DO NOT operate if any screws are loose or missing, or serious damage may occur. Use LOCTITE 262 on screws.

9. Check your J-GUN’s back cover gasket for air leaks. An air leak will result in inaccurate torque.

THE NUT WILL NOT LOOSEN WITH TOOL:

• Take the tool off the application and test. (Recheck fittings)
• Don’t force a smaller tool to do the impossible.

It can take 1.5 to 3 times the original torque to bust loose.

Example: A 2” stud according to GE/Westinghouse should torque to 3300 ft lbs. Because of heat corrosion the torque necessary to remove the nut may be 6600 to 9900 ft lbs.

SOCKET ISSUES:

• Is the socket being used a high quality impact socket?
  (sockets are designed for the huge forces created by hydraulic & pneumatic wrenches)
• Insure the socket is fully engaging the nut.
• Inspect the socket for cracks before using.
• Has the socket become worn out from use on an impact wrench?
  (we recommend that separate sockets be used with impacts since impact tools hollow out sockets and may make them unsafe when used with a jGun driver)
• Altered sockets are more likely to break – use with care, keep body parts clear.