Tweco PakMaster 50XL Plus (CE) - Manual (Page 32)

SECTION 5: SERVICE 26 Manual 0-2780
A-02476
Filter
Element
Housing
Cover
Barbed
Fitting
Spring
Assembled Filter
Figure 5-1 Optional Dry Air Filter Replacement
3. Disconnect gas supply hose from barbed fitting.
4. Turn the Cover counterclockwise and remove it
from the Filter Housing. The Filter Element is lo-
cated inside the housing.
5. Remove the Filter Element from the Housing and
set Element aside to dry.
6. Wipe inside of housing clean, then insert the re-
placement Filter Element cup side first, as shown
below.
7. Replace Housing on Cover.
8. Reattach gas supply hose to barbed fitting.
NOTE
If unit leaks between housing and cover, inspect
the "O" Ring for cuts or other damage.
5.03 Common Operating Problems
WARNINGS
Disconnect primary power at the source before dis-
assembling the power supply, torch, or torch leads.
Frequently review the Important Safety Precau-
tions at the front of this Manual. Be sure the op-
erator is equipped with proper gloves, clothing, eye
and ear protection. Make sure no part of the
operator’s body comes into contact with the work-
piece while the torch is activated.
CAUTION
Sparks from the cutting process can cause damage
to coated, painted, and other surfaces such as glass,
plastic and metal.
NOTE
Handle torch leads with care and protect them from
damage.
A. Piloting
Piloting is harder on parts life than actual cutting because
the pilot arc is directed from the electrode to the tip rather
than to a workpiece. Whenever possible, avoid excessive
pilot arc time to improve parts life.
B. Torch Standoff
Improper standoff (the distance between the torch tip and
workpiece) can adversely affect tip life as well as shield
cup life. Standoff may also significantly affect the bevel
angle. Reducing standoff will generally result in a more
square cut.
C. Edge Starting
For edge starts, hold the torch perpendicular to the work-
piece with the front of the tip at the edge of the work-
piece at the point where the cut is to start. When starting
at the edge of the plate, do not pause at the edge and
force the arc to "reach" for the edge of the metal. Estab-
lish the cutting arc as quickly as possible.
D. Direction of Cut
In the PCH/M-40 torches, the plasma gas stream swirls
as it leaves the torch to maintain a smooth column of gas.
This swirl effect results in one side of a cut being more
square than the other. Viewed along the direction of travel,
the right side of the cut is more square than the left (Refer
to Figure 5-2). To make a square-edged cut along an in-
side diameter of a circle, the torch should move counter-
clockwise around the circle. To keep the square edge along
an outside diameter cut, the torch should travel in a clock-
wise direction.