Tweco PCM-120 Machine Torch - Manual (Page 32)

CUSTOMER/OPERATOR SERVICE 5-2 Manual 0-2698
It is recommended to apply a very light film of o-
ring lubricant, (Catalog Number 8-4025), to the in-
ternal torch head assembly o-rings on a weekly ba-
sis.
NOTE
DO NOT use other lubricants or grease, they may
not be designed to operate within high tempera-
tures or may contain “unknown elements” that
may react with the atmosphere. This reaction can
leave contaminants inside the torch. Either of these
conditions can lead to inconsistent performance or
poor parts life.
5.03 Common Operating Faults
The following lists the more common cutting faults and
what is the possible cause:
1. Insufficient Penetration
a. Cutting speed too fast
b. Torch tilted too much
c. Metal too thick
d. Worn torch parts
e. Cutting current too low
f. Non-Genuine Thermal Dynamics Parts
2. Main Arc Extinguishes
a. Cutting speed too slow
b. Torch standoff too high from workpiece
c. Cutting current too high
d. Work cable disconnected
e. Worn torch parts
f. Non-Genuine Thermal Dynamics Parts
3. Excessive Dross Formation
a. Cutting speed too slow
b. Torch standoff too high from workpiece
c. Worn torch parts
d. Improper cutting current
e. Non-Genuine Thermal Dynamics Parts
4. Short Torch Parts Life
a. Oil or moisture in air source
b. Exceeding system capability (material too thick)
c. Excessive pilot arc time
d. Air flow too low (incorrect pressure)
e. Improperly assembled torch
f. Output current too high
g. Torch tip contacting workpiece
h. Damaged or loose torch head components
i. Non-Genuine Thermal Dynamics Parts
5. Poor Pilot Starting
a. High coolant conductivity (Refer to Power Supply
Manual)
b. Non-Genuine Thermal Dynamics Parts
5.04 Inspection and Replacement
Consumable Torch Parts
WARNINGS
Disconnect primary power to the system before
disassembling the torch or torch leads.
DO NOT touch any internal torch parts while the
AC indicator light on the front panel of the Power
Supply is ON.
Remove the consumable torch parts per the following
procedure (See Note):
NOTE
A multipurpose wrench is supplied for changing
the tip, electrode and gas distributor in the torch
head.