Thermal Dynamics CE PAKMaster 75 XL Plus, Operating Manual, Page: 35 / 50

Manual 0-2782 5-1 SERVICE
SECTION 5:
SERVICE
5.01 Introduction
This section describes basic maintenance procedures per-
formable by operating personnel. No other adjustments
or repairs are to be attempted by other than properly
trained personnel.
For major troubleshooting and parts replacement pro-
cedures refer to PAK Master 75XL Plus Power Supply
Service Manual (CE) 0-2783.
5.02 General Maintenance
WARNING
Disconnect primary power to the system before dis-
assembling the torch, leads, or power supply.
To clean the unit, open the enclosure (refer to Section 5.05-
A, Opening Enclosure) and use a vacuum cleaner to re-
move any accumulated dirt and dust. The unit should
also be wiped clean. If necessary, solvents for cleaning
electrical apparatus may be used.
Perform maintenance per Appendix 3, Maintenance
Schedule.
A. Filter/Regulator Element Replacement
The Filter/Regulator Assembly is on the rear panel. For
better system performance, the Filter/Regulator Assem-
bly filter element should be checked per the Maintenance
Schedule, and either cleaned or replaced.
1. Remove power from the power supply; turn off
the gas supply.
2. Unscrew the plastic bowl on the bottom of the Fil-
ter/Regulator Assembly. The filter element will
be visible and still attached to the main body of
the Filter Regulator.
3. Grasp the filter element and unscrew it from the
Filter/Regulator body. The filter element will
come off with a spool and some additional pieces.
Regulator/Filter
Assembly
Spool
Bowl
Spring
Filter
Element
Baffle
Ring
A-02988
Figure 5-1 Standard Filter Element Replacement
4. Note the correct assembly of the filter/spool then
remove the filter from the spool and either clean
it or replace it.
5. The filter element and spool, with the baffle ring
in place (teeth facing downward) can be screwed
back into the Regulator body by compressing the
spring on the spool. Tighten firmly by hand.
B. Optional Single-Stage Air Filter Element
Replacement
This part is an option and is not installed on all units. See
Section 6, Parts Lists, for replacement element catalog
number.
NOTE
The XL PLUS Power Supply shuts down automati-
cally when the Filter Element becomes completely
saturated. The Filter Element can be removed from
its housing, dried out, and reused. Allow 24 hours
for Element to dry.
1. Remove power from power supply.
2. Shut off air supply and bleed down system before
disassembly to change Filter Element.