Tweco PCM-120 Machine Torch - Manual (Page 33)

Manual 0-2698 5-3 CUSTOMER/OPERATOR SERVICE
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 from the torch.
NOTE
Slag built up on the shield cup that cannot be re-
moved may effect the performance of the system.
Electrode
Shield Cup Tip
Gas
Distributor
Torch Head
Water Tube Extension
(Gouging Only)
A-02188
Figure 5-2 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 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-02195
Figure 5-3 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) re-
move the electrode. Refer to Figure 5-4 and check the
face of the electrode for excessive wear.
Worn Electrode
New Electrode
A-02208
Figure 5-4 Electrode Wear
6. Install the electrode and tighten with multipurpose
wrench. Do not over tighten the electrode. The cir-
cular 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.