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HERO Operator’s Manual – Page 17 of 23
The Gland Seal is located behind the Gland Nut directly in front of the gun trigger and should be replaced
periodically as part of preventive maintenance. A worn Gland Seal can be the cause of leaking between
the Gland Nut and the Needle directly in front of the trigger. If leaking occurs, try tightening the Gland
Nut before changing the Gland Seal.
To Replace The Gland Seal:
1. Remove the Material Flow Adjustment Screw, Spring and Needle from the back of the gun.
2. Using the opened end of a 7/16" combination wrench, remove the Gland Nut.
3. Being careful not to damage the threads of the gland nut chamber, remove the Gland Seal using a
hardened needle or pick.
4. Replace the Gland Seal and re-install the Gland Nut.
5. Re-install the Needle, Spring and Material Flow Adjustment Screw.
Tighten the Gland Nut as much as possible without restricting the free movement of the trigger. If the
gun continues to spray after the trigger is released, the gland nut is too tight. If material leaks out between
the Gland Nut and the Needle directly in front of the trigger, the gland nut is too loose. Adjust
accordingly.