Tweco Maximizer 300 Torch for BNFL - Manual (Page 33)

Manual 0-2990 5-3 SERVICE
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.
Multi-Purpose Wrench
(Catalog Number 20-0001)
Used for Electrodes
Used for 11/16" ( 17.5 mm)
Across Tip Flats
Gas Distributor Notch
Used with 11/16" (17.5 mm)Tip
Used for 5/8" (15.9 mm)
Across Tip Flats
Gas Distributor Notch
Used with 5/8" (15.9 mm)Tip
This Side
Towards Torch
A-01639
Figure 5-1 Multi-Purpose Wrench
1. Unscrew and remove the shield cup body and end
cap from the torch.
NOTE
Slag built up on the shield cup that cannot be re-
moved may effect the performance of the system.
Torch Head
Electrode
Tip
Gas Distributor
Shield Cup Body
Art # A-02207
End Cap
Figure 5-2 Consumable Parts
2. Inspect the cup for damage. Wipe it clean or replace
if damaged.
3. Using the multipurpose wrench (5/8 inch slot) remove
the tip. Check for excessive wear (indicated by an elon-
gated or oversized orifice). Replace the tip if neces-
sary.
NOTE
The tip, electrode and gas distributor have o-rings
on each part. The o-rings should be removed and a
light coating of o-ring lubricant (catalog number
8-4025) applied.
Good Tip
Worn Tip
A-01578
Figure 5-3 Tip Wear