Troubleshooting
6-8
Part 237478_03
E 2012 Nordson Corporation
Service Block Pneumatic Operational Check
Use this procedure to determine if air is flowing properly through the service
block.
1. Relieve hydraulic pressure (refer to the Relieving Hydraulic Pressure
procedure in Section3, Installation).
2. Place under the gun nozzle a drain pan capable of withstanding adhesive
temperatures of 230_C (450_F).
3. Ensure that the gun trigger safety is in the LOCKED position.
4. Use a hex wrench to remove the two socket‐head screws that secure the
module to the service block, then remove the module.
5. Slowly increase air pressure.
Figure 6‐4 Installing the Auxiliary
Guide Handle
6. Being careful to shield the area and operator, trigger the gun.
S Air flowing from the service block: normal indication. Return to
Table6‐1, Troubleshooting Guide.
S No air flowing from the service block: service block clogged or air
valve defective. Clean or replace service block or air valve (refer to
Section7, Repair).