Thermal Dynamics DRAG-GUN 38, Instruction Manual

Page: 44 / 60

SECTION 5: SERVICE 38 Manual 0-2729
J. Pressure Switch Replacement
1. Remove the right side panel from Power Supply per
paragraph 'D' above.
2. Disconnect wires to Pressure Switch.
3. Remove Pressure Switch Assembly from top end of
Tee fitting.
4. Replace Pressure Switch by reversing steps 1-3.
Apply Loctite #565(or equivalent thread sealant) to
Pressure Switch threads prior to installing.
Air Intake Filter
Compressor
Pressure Switch
#7 Connector
Tee Fitting
#6 Connector
1/8 NPT
A-02609
Figure 5-19 Pressure Switch Wiring Connections
k. Current Control Knob Guard(s)
Replacement
WARNING
Disconnect primary power at source before disas-
sembling the power supply.
NOTE
The torch lead and work lead must be disconnected
in order to replace the Current Control Knob Guards.
1. Remove top panel cover per paragraph 'E' above.
2. Remove nuts securing Current Control Knob
Guard(s) to top Panel Cover.
3. Install replacement Guard(s) by reversing steps 1-3.
WARNING
Be careful of ground wire when removing and in-
stalling cover.
l. Work Cable and Clamp Replacement
1. Remove right side panel per paragraph 'D' above.
2. Disconnect Work Cable connection at main PC
Board.
3. Remove Work Cable Strain Relief from top Panel
Cover and remove Cable from unit.
4. Install replacement Work Cable by reversing steps
1-3.
m. Capacitor PC Board Replacement
Procedure
1. Remove the top panel per paragraph 'E' above.
NOTE
For improved access to the Capacitor PC Board,
remove the two nuts and washers securing the cen-
ter divider to the unit base, then slide the divider
towards the Compressor.
2. Remove the black pad located on the Capacitors.
3. Squeeze the three plastic mounting standoffs secur-
ing the Capacitor PC Board to the Main PC Board.
(Two are located along the top edge of the PC Board;
the third is located near the center of the PC Board.)
A-02122
Capacitor
PC Board
Wire #3
(+) Terminal
(-) Terminal
Mounting Standoffs
(N)
Figure 5-20 Capacitor PC Board Connections