Tweco PCM-62 Machine Torch - Manual (Page 31)

Manual 0-2817 5-3 SERVICE
Good Tip Worn Tip
A-00942
Figure 5-2 Tip Wear
4. Remove the gas distributor and check for excessive
wear, plugged gas holes, or discoloration. Replace if
necessary.
5. Remove the SureLok Electrode by pulling it straight
out of the torch head. Refer to the following figure
and check the face of the electrode for excessive wear.
Worn Electrode
New Electrode
A-02794
Figure 5-3 Electrode Wear
6. Reinstall the SurLok electrode into the torch head by
pushing it straight into the torch head until it clicks.
7. Reinstall the gas distributor and tip into the torch head.
8. 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.
5.05 Troubleshooting Guide
This subsection covers troubleshooting that requires
dissasembly and electronic measurements. It is helpful
for solving many of the common problems that can arise
with this torch assembly.
How to Use This Guide
The following information is a guide to help the Customer
determine the most likely causes for various symptoms.
This guide is set up in the following manner:
X. Symptom (Bold Type)
Any Special Instructions (Text Type)
1. Cause (Italic Type)
a. Check / Remedy (Text Type)
Locate your symptom, check the causes (easiest listed first)
then remedies. Repair as needed being sure to verify that
unit is fully operational after any repairs.
Troubleshooting
A. Torch will not pilot when torch switch is activated
1. Power Supply RUN / SET or RUN / SET / LATCH
switch in SET position
a. Place switch to RUN position
2. Parts - In - Place (PIP) not satisfied
a. Check canted coil spring inside shield cup
3. Faulty torch switch
a. Check continuity
4. Faulty torch parts
a. Inspect torch parts and replace if necessary. Re-
fer to subsection 5.04, Inspection and Replace-
ment Consumable Torch Parts.
5. Gas pressure too high
a. Set proper operating gas pressure
6. Faulty components in torch and leads assembly.
a. Inspect torch assemblies and replace if neces-
sary. Refer to subsection 5.06, Torch and Leads
Troubleshooting.
7. Faulty components in power supply system components
a. Return for repair or have qualified technician
repair per Service Manual.
B. No cutting output
1. Torch not properly connected to power supply
a. Check that torch leads are properly attached
to power supply.
2. Shield cup not properly installed on torch
a. Check that shield cup is fully seated against
torch head (do not overtighten).
3. Parts - In - Place (PIP) not satisfied
a. Check canted coil spring inside shield cup