Tweco FP-55 - Manual (Page 27)

Manual 0-2846 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 other than by properly trained
personnel.
NOTE
Trained personnel can receive more advanced
troubleshooting instructions and information on
parts replacement by requesting Service Manual
0-2847.
5.02 General Maintenance
A. Maintenance Schedule
WARNING
Disconnect primary power to the system before dis-
assembling the torch, leads, or power supply.
To clean the unit, open the enclosure per procedures in
section 5.05-A, Cover Removal, and use a vacuum cleaner
to remove any accumulated dirt and dust. The unit should
also be wiped clean. If necessary, solvents for cleaning
electrical apparatus may be used.
Perform routine maintenance according to the schedule in
Appendix 3. The actual frequency of maintenance may
need to be adjusted according to the operating environ-
ment.
B. Filter Regulator Element Replacement
The Filter /Regulator Assembly is located on the rear panel.
For better system performance, the Filter/Regulator As-
sembly filter element should be checked per Appendix 3,
Maintenance Schedule, and either cleaned or replaced.
1. Remove power from the power supply; turn off the
gas supply.
Filter
Element
Regulator
Assembly
Spool
Spring
Baffle
Ring
A-02954
Bowl
Figure 5-1a Filter/Regulator - Removing the Filter
Element (units with type A Regulator/Filter)
A-02995
Regulator/Filter
Assembly
Spool
Bowl
Spring
Filter
Element
Baffle
Ring
Figure 5-1b Filter/Regulator - Removing the Filter
Element (units with type B Regulator/Filter)