Tweco Pak 200 - Manual (Page 83)

Manual 0-5057 7-3 TORCH MAINTENANCE
TORCH MAINTENANCE PAK 200
NOTE
Slag built up on the shield cup that cannot be
removed may effect the performance of the
system.
Electrode
Shield Cup Tip
Gas
Distributor
Torch Head
Water Tube Extension
(Gouging Only)
A-02188
Figure 7-2: Torch 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 orifi ce). Replace the tip if necessary.
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
(catalogue number 8-4025) applied.
Good Tip Worn Tip
A-02195
Figure 7-3: Tip Wear
4. Tilt the Torch Head to remove the gas distributor. The
end of the multipurpose wrench can be used to help
remove the gas distributor. Check for excessive wear,
plugged gas holes, or discoloration. Replace if neces-
sary.
5. Using the multipurpose wrench (electrode area) remove
the electrode. Refer to "Figure 7-4: Electrode Wear" and
check the face of the electrode for excessive wear.
Worn Electrode
New Electrode
A-02208
Figure 7-4: Electrode Wear
6. Install the electrode and tighten with multipurpose
wrench. Do not over tighten the electrode. The circular
area around the wrench used for electrodes will also
align the electrode in the Torch Head. This will prevent
installing electrodes on an angle and cross threading
the electrode in the Torch Head.
7. Install the gas distributor.
8. Install the tip and tighten with the multipurpose wrench.
Do not over tighten the tip.
CAUTION
Make sure both the tip and electrode corre-
spond with the plasma and secondary gases
being used, the current range, and the type of
operation. Refer to Section "3.11 T o r c h
Parts Selection" on page 3-14.
9. Hand tighten the shield cup until it is seated on the
Torch Head. If resistance is felt when installing the cup,
check the threads before proceeding.