SC_450 PreciseCoat Conformal Coating Jet_Rev_04.pdf - 第38页
SC-450 PreciseCoat C onformal C oating J et Maintenance and Service 32 © 2024 Nordson Corporation f. Install the f luid body assembly i nto the heater insulatio n , see 5.7.1 Removing and Replacing the He ater Assembly, …
SC-450 PreciseCoat Conformal Coating Jet Maintenance and Service
© 2024 Nordson Corporation 31
4. Inspect the U-cup seal in the fluid path on the inside bottom of the fluid body assembly.
> Do not remove the U-cup seal unless the U-cup seal is damaged or fluid leaks from the
body weep hole.
WARNING!
The U-cup seal may become damaged during removal causing fluid to leak from
the SC-450. Do not re-use the U-cup seal once it has been removed from the
SC-450.
a. If damaged, use the seal removal tool to remove the U-cup seal from the bottom of the
fluid body assembly.
b. Install a new U-cup seal by placing the U-cup seal on the end of the seal press tool
supplied in the shipping kit (with the side containing the spring facing outward)
(Figure 5-8).
Item Description
1 Seal Press Tool (Item 23)
2 U-Cup Seal (Items 19 and 23)
Figure 5-8 Utilizing the Seal Press Tool
c. Insert the seal press tool into the fluid body assembly (Figure 5-9).
d. Ensure the seal press tool is seated at the bottom of the chamber.
e. Push down on the seal press tool to seat the U-cup seal into the chamber.
> The U-cup seal should snap into place.
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NOTE
When replacing the U-cup seal, it is recommended to cycle the SC-450 with solvent at
zero (0) psi fluid pressure for 10,000 cycles.
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SC-450 PreciseCoat Conformal Coating Jet Maintenance and Service
32 © 2024 Nordson Corporation
f. Install the fluid body assembly into the heater insulation, see 5.7.1 Removing and
Replacing the Heater Assembly, Fluid Body, and Fluid Seal.
Item Description
1 Seal Press Tool (Item 23)
2 U-Cup Seal (Items 19 and 23)
3 Assy, Fluid Body, SS (Item 16)
Figure 5-9 Seating the U-Cup Seal
To install the heater assembly (Figure 5-7):
1. Inspect heater contact pads.
> Should be clean and free of any debris or coating material.
2. Slide heater assembly onto fluid body and up to valve.
3. Install three (3) screws securing the heater assembly to the valve body assembly.
4. Torque the three (3) screws to 1.35 Nm (12 in-lbs).
5. Install the fluid needle, see 3.6 Installing the Fluid Needle.
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SC-450 PreciseCoat Conformal Coating Jet Maintenance and Service
© 2024 Nordson Corporation 33
5.7.2 Replacing Heater Insulation and Interconnect PCA
To replace the heater insulation or heater interconnect PCA (Figure 5-10):
1. Remove the heater assembly, see 5.7.1 Removing and Replacing the Heater Assembly,
Fluid Body, and Fluid Seal.
2. Rotate the SC-450 upside down and remove one (1) screw securing the heater interconnect
PCA to the heater insulation and valve body assembly.
3. Disconnect the heater control cable from the heater interconnect PCA.
4. To replace the heater interconnect PCA:
a. Keep the applicator upside down and pull the heater control cable through the service
hole on the heater insulation.
b. Connect the heater control cable to a new heater interconnect PCA.
Item Description Item Description
1 Insulation, Heater (Item 13) 3 Screw
2 Cable, Heater Control 4 PCA, Interconnect, Heater (Item 14)
Figure 5-10 Removing the Heater Insulation
To install the heater insulation (Figure 5-10):
1. Pull the heater control cable through the service hole on the heater insulation.
2. Connect the heater control cable to the heater interconnect PCA.
3. Apply Loctite 242 to the screw.
4. Install the one (1) screw securing the heater interconnect PCA and the heater insulation to
the valve body assembly.
5. Torque the screw to 1.35 Nm (12 in-lbs).
6. Inspect heater contact pads.
> Should be clean and free of any debris or coating material.
7. Install the fluid body and heater assembly, see 5.7.1 Removing and Replacing the Heater
Assembly, Fluid Body, and Fluid Seal.
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