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.
Always check and drain the water bowl on your F/R/L unit.
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.
Never exceed the maximum air pressure specified on the torque chart supplied with your J-GUN.
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.
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.
Check the air hose for leaks. An air leak will result in inaccurate torque.
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.
Check your J-GUN’s back cover gasket for air leaks. An air leak will result in inaccurate torque.
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.