SC_450 PreciseCoat Conformal Coating Jet_Rev_04.pdf - 第40页
SC-450 PreciseCoat C onformal C oating J et Maintenance and Service 34 © 2024 Nordson Corporation 5.7.3 Replaci ng the Solenoid Valve The solenoid va lve and associate d parts are part of th e cable with solenoid ass emb…
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.
4
1
3
2
SC-450 PreciseCoat Conformal Coating Jet Maintenance and Service
34 © 2024 Nordson Corporation
5.7.3 Replacing the Solenoid Valve
The solenoid valve and associated parts are part of the cable with solenoid assembly (Item 12).
To remove the solenoid valve (Figure 5-11):
1. Remove the SC-450 from the coating system, see 5.6 Removing the SC-450.
2. Remove the heater assembly and separate the fluid body and and heater insulation from
the valve body, see 5.7.1 Removing and Replacing the Heater Assembly, Fluid Body, and
Fluid Seal.
3. Remove the four (4) screws from the junction plate.
4. Separate the junction plate and 3-way valve from the valve body assembly.
5. Remove and set aside the two (2) O-rings (Items 11 and 23).
6. Remove and set aside the O-ring (Items 10 and 23).
Item Description Item Description
1
Screw, M3 x 0.5 x 16 SHCS, SS
(part of Item 12)
4 Assy, Cable w/Solenoid (Item 12)
2 Plate, Junction (part of Item 12) 5 O-Ring, 020, Viton (Items 10 and 23)
3 O-Ring (Items 11 and 23) 6 Dowel Pins
Figure 5-11 Replacing the Solenoid Valve Assembly
1
3
4
2
5
3
6
SC-450 PreciseCoat Conformal Coating Jet Maintenance and Service
© 2024 Nordson Corporation 35
To install the solenoid (Figure 5-11):
WARNING!
Special care should be taken when handling O-rings and seals. If O-rings and
seals are damaged, the film coater may leak or fail prematurely.
1. Apply a thin coat of lubricant to new O-rings (Items 10, 11, and 23).
2. Install the O-rings into the valve body assembly.
3. Slide the solenoid onto the dowel pins extruding from the valve body assembly.
4. Apply a thin coat of dry paste lubricant (Item 23) to a new O-ring (Items 11 and 23).
5. Insert the O-ring (Items 11 and 23) into the rear of the junction plate.
6. Install the junction plate onto the dowel pins extruding from the valve body assembly.
> Ensure the control cable is fully seated into the groove of the junction plate.
7. Install four (4) screws securing the junction plate and 3-way valve onto the valve body
assembly.
8. Install the SC-450, see 3.4 Installing the SC-450 PreciseCoat Jet.