Thermal Dynamics CUTMASTER 81, Service Manual

Page: 47 / 88

Manual 0-2957 5-7 REPLACEMENT PROCEDURES
5. Connect the input power cables and the cable con-
nections to the main input contactor.
6. Re-install the Power Supply cover.
7. Test the Power Supply for proper operation.
5.07 Rear Panel Parts Replacement
Refer to subsection 6.06 for parts list and overall detailed
drawing.
WARNING
Disconnect primary power from the source before
opening or disassembling the power supply.
A. Filter/Regulator Assembly Replacement
WARNING
Disconnect the gas supply at the source and bleed
down the system before attempting this procedure.
1. Disconnect the gas input hose from the Filter/
Regulator Assembly on the Rear Panel of the unit.
2. Remove the four bolts securing the Regulator
Mounting Bracket to the Rear Panel.
3. Disconnect the black gas tube from the Filter/
Regulator Assembly Adapter Fitting. Hold a
wrench or similar tool against the
locking ring on
the Fitting and pull on the tube to release it.
4. Remove the nut securing the Filter/Regulator As-
sembly to the Regulator Mounting Bracket. Re-
move the Filter-Regulator Assembly from the
Mounting Bracket.
5. Install the replacement Filter/Regulator Assem-
bly by reversing the steps above. When connect-
ing the gas tube to the Adapter Fitting, simply
insert the hose into the fitting until fully seated
and it will automatically lock.
B. Filter/Regulator Bracket Replacement
1. Remove the four bolts securing the Regulator
Bracket to the Rear Panel.
2. Remove the nut securing the Filter/Regulator As-
sembly to the Regulator Bracket. Remove the
Bracket from the Filter-Regulator Assembly.
3. Install the replacement Bracket by reversing the
above steps.
C. Input Power Cable Replacement
1. Remove the cover per subsection 5.04-A.
2. Locate and label the input power cable connec-
tions and disconnect the cable.
3. Unthread the retaining nut on the Input Cable
Strain Relief on the inside of the Rear Panel and
remove the Input Power Cable from the unit.
4. Install the replacement Input Power Cable by re-
versing the above steps. The Input Power Cable
ground wire requires a ring terminal.
D. Rear Panel Replacement
WARNING
Disconnect primary input power and the gas sup-
ply at the source and bleed down the system before
performing this procedure.
1. Remove the cover per subsection 5.04-A.
2. Remove the primary input power cable per sec-
tion 5.07-C.
3. Remove the Regulator/Filter Assembly per sec-
tion 5.07-A.
4. Remove two bolts at the bottom corners of the
Rear Panel.
5. Remove one nut on a stud on the inside of the
Rear Panel, at the rear edge of the center chassis.
6. Replace the Rear Panel by reversing the above
steps.
7. If not already done, attach the data tag(s), pro-
vided with the replacement Rear Panel. Position
these as on the original Rear Panel.