Repair 7-1 1997 Nordson CorporationAll rights reserved 106 915CIssued 11/97Manual 21-27Section 7RepairWARNING: Allow only qualified personnel to perform thefollowing tasks. Observe and follow the safety instructions inthis document and all other related documentation.WARNING: Risk of electrical shock. Failure to observe thiswarning may result in personal injury, death, or equipmentdamage.WARNING: System or material pressurized. Relieve pressure.Failure to observe this warning may result in serious injury.CAUTION: Do not overtighten parts. Failure to observe thisprecaution will result in equipment damage.Repair instructions for the WM-1 spray gun are described in theDisassembly and Assembly sections. Before replacing any worn ordamaged part(s), remove the spray gun from the fluid delivery system.To disconnect the spray gun from a fluid delivery system, perform thefollowing tasks:1. Turn off the electrostatic power supply.2. Flush the fluid delivery system through the WM-1 spray gun.3. Relieve coating material and air pressure within the fluid deliverysystem.4. See Figure 7-1. Disconnect the grounded air hose (4) from the WM-1spray gun connector (5).5. Loosen the captive screw (1) securing the rear slide (2). Remove therear slide by sliding upward.6. Remove the screws (7) securing the trigger (6). Remove the trigger.1. Introduction