Tweco 42 CutMaster Operating Manual - Manual (Page 27)

CUTMASTER 42
Manual 0-5141 5T-1 SERVICE
SECTION 5 TORCH:
SERVICE
5T.01 General Maintenance
NOTE
Refer to Previous "Section 5 System" for
common 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 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 electrical
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 con-
tact cleaner into the torch and blowing it through with
compressed air.
CAUTION
Dry the torch thoroughly before reinstalling.
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 shield cup in place. Position the
torch with the shield cup facing upward to
prevent these parts from falling out when
the cup is removed.
1. Unscrew and remove the shield cup from the torch.
NOTE
Slag built up on the shield cup that cannot
be removed may effect the performance of
the system.
2. Inspect the cup for damage. Wipe it clean or replace
if damaged.
Art# A-09345
Electrode
Start Cartridge
Tip
Shield Cup
Torch Head
Consumable Parts
3. Remove the tip. Check for excessive wear (indicated
by an elongated or oversized orifice). Clean or
replace the tip if necessary.