Tweco A40-A60 CutMaster - Manual (Page 73)

CUTMASTER A40, A60
Manual 0-5120 SERVICE 5T-1
SECTION 5 TORCH:
SERVICE
5T.01 General Maintenance
NOTE
Refer to Previous "Section 5 System" for com-
mon and fault indicator descriptions.
Cleaning Torch
Even if precautions are taken to use only clean
air with a torch, eventually the inside of the torch
becomes coated with residue. This buildup can
affect the pilot arc initiation and the overall cut
quality of the torch.
WARNING
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 of the Power Supply is
ON.
The inside of the torch should be cleaned with elec-
trical contact cleaner using a cotton swab or soft
wet rag. In severe cases, the torch can be removed
from the leads and cleaned more thoroughly by
pouring electrical contact cleaner into the torch
and blowing it through with compressed air.
CAUTION
Dry the torch thoroughly before reinstalling.
O-Ring Lubrication
An o-ring on the Torch Head and ATC Male Con-
nector requires lubrication on a scheduled basis.
This will allow the o-rings to remain pliable and
provide a proper seal. The o-rings will dry out,
becoming hard and cracked if the lubricant is not
used on a regular basis. This can lead to potential
performance problems.
It is recommended to apply a very light film of
o-ring lubricant (Catalog # 8-4025) to the o-rings
on a weekly basis.
Upper Groove
with Vent Holes
Must Remain Open
Threads
Upper O-Ring
in Correct Groove
Lower O-Ring
Art # A-03725
Torch Head O-Ring
ATC O-Ring
NOTE
DO NOT use other lubricants or grease, they
may not be designed to operate within high
temperatures or may contain “unknown ele-
ments” 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.
5T.02 Inspection and Replacement of
Consumable Torch Parts
WARNING
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 of the Power Supply is
ON.
Remove the consumable torch parts as follows:
NOTE
The shield cup holds the tip and starter cartridge
in place. Position the torch with the shield cup
facing upward to prevent these parts from fall-
ing out when the cup is removed.
1. Unscrew and remove the shield cup from the
torch.