Tweco FP-82 - Manual (Page 27)

Manual 0-2870 5-1 CUSTOMER/OPERATOR SERVICE
SECTION 5:
CUSTOMER/OPERATOR
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.
5.02 General Maintenance
A. Maintenance Schedule
WARNING
Disconnect primary power and bleed down the sys-
tem before disassembling the torch, leads, or power
supply.
To clean the unit, open the enclosure per procedure 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.
Refer to Appendix 3 for maintenance schedule and proce-
dures.
B. Regulator/Filter Element Replacement
The Regulator/Filter Assembly is on the rear panel. For
better system performance, the Regulator/Filter Assembly
filter element should be checked per the Maintenance
Schedule, and either cleaned or replaced. Refer to Section
6, Parts List, for replacement filter element catalog num-
ber.
1. Remove power from the power supply; turn off the
gas supply and bleed down the system.
2. Unscrew the bowl on the bottom of the Regulator/
Filter Assembly. The filter element will be visible
and still attached to the main body of the Regula-
tor/Filter.
3. Grasp the filter element and unscrew it from the
Regulator/Filter body. The filter element will come
off with a spool and some additional pieces.
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.
A-02995
Regulator/Filter
Assembly
Spool
Bowl
Spring
Filter
Element
Baffle
Ring
Regulator/Filter Element Replacement
6. Reinstall the bowl.
7. Turn on the air supply.
C. Optional Single-Stage Filter Element
Replacement
These instructions apply to power supplies where the op-
tional Single-Stage Filter has been installed.
The Power Supply shuts down automatically when the
Filter Element becomes completely saturated. The Filter
Element can be removed from its housing, dried, and re-
used. Allow 24 hours for Element to dry. Refer to Section
6, Parts List, for replacement filter element catalog num-
ber.
1. Remove power from power supply.
2. Shut off air supply and bleed down system before
disassembling Filter to change Filter Element.
3. Disconnect gas supply hose.
4. Turn the Cover counter-clockwise and remove it
from the Filter Housing. The Filter Element is lo-
cated inside the Housing.