Tweco SL100 - Manual (Page 38)

SERVICE 5-4 Manual 0-2962
Worn Electrode
New Electrode
Art # A-03284
Electrode Wear
7 . Reinstall the Electrode by pushing it straight into the
torch head until it clicks.
8 . Reinstall the desired starter cartridge and tip into the
torch head.
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.
5.05 Troubleshooting Guide
This subsection covers troubleshooting that requires
disassembly 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
/ Operator determine the most likely causes for various
symptoms.
This guide is set up as follows:
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 switch in SET position
a. Place RUN / SET switch to RUN position.
2. Parts - In - Place (PIP) not satisfied.
a. Check that shield cup is properly installed.
3. Upper O-ring on torch head is in wrong position.
a. Remove shield cup from torch; check position
of upper O-ring. Correct if necessary.
Lower O-Ring
Upper O-Ring
in Correct Groove
Upper Groove
with Vent Holes
Must Remain Open
Threads
Art # A-03640
4. Faulty Torch Switch or PIP Switch
a. Check PIP switch for continuity.
5. Faulty torch parts
a. Inspect torch parts and replace if necessary.
Refer to Section 5.04, Inspection and Replace-
ment Consumable Torch Parts
6. Gas pressure too low
a. Set proper operating gas pressure.
7. Faulty components in torch and leads assembly
a. Inspect torch assemblies and replace if neces-
sary.
8. Faulty components in power supply
a. Return for repair or have qualified technician
repair per Service Manual.