Tweco C-20A CUTSKILL - Manual (Page 19)

Manual 0-4677 5-1 SERVICE
SECTION 5:
SERVICE
5.01 General Maintenance
O-rings on the Torch require lubrication on a regular
basis, depending on how frequently the torch shield
cup is disconnected and re-connected. This will allow
the O-rings to remain pliable and provide a proper
seal. The O-rings will dry out, becoming hard and
cracked, if the O-ring lubricant is not used on a regular
basis. This can lead to potential performance prob-
lems.
Remove and apply a very light film of O-ring lubricant
(Catalog # 8-4025) to the O-rings on a weekly basis.
NOTE
DO NOT use other lubricants or grease on the torch
O-rings. They may not be designed to operate within
high temperatures or may contain “unknown ele-
ments” that may react with the atmosphere. This
reaction can leave contaminants inside the torch.
Either of these conditions can lead to inconsistent
performance or poor parts life.
Lower O-Ring
Cat. #8-3486
Upper O-Ring
in Correct Groove
Cat. #8-3487
Upper Groove
with Vent Holes
Must Remain Open
Threads
Art # A-04394
5.02 Basic Troubleshooting Guide
WARNING
There are extremely dangerous voltage and power
levels present inside this unit. Do not attempt to
diagnose or repair unless you have had training in
power electronics measurement and troubleshoot-
ing techniques.
1. Basic Troubleshooting Overview
This guide covers basic troubleshooting. It is helpful for
solving many of the common problems that can arise with
this system. If major complex subassemblies are faulty,
the unit must be returned to an authorized service center
for repair.
Follow all instructions as listed and complete each sec-
tion in the order presented.
2. Common Symptoms
A. Primary power switch is ON, but power indicator
doesn’t light.
1. Improper electrical connection.
a. Check the input cable line & connection.
b. Check input power that its turned on.
c. Check the input power fuse.
2. System was overloaded.
a. Turn Primary Power Switch Off and then On
again.
3. Switch may be faulty.
a. Return to an authorized service center for re-
pair.
B. Primary power switch is on, but the cooling fan
does not work.
1. No power / incorrect power to fan or failed fan.
a. Return to an authorized service center for re-
pair.
C. No air flow at torch when air check switch is turned
on.
1. Input air connection is disconnected.
a. Connect the input air.
2. Input air supply not working.
a. Check the compressor manufacturer's manual
for trouble shooting and follow local mainte-
nance procedures.
3. Internal connection is disconnected or loose.
a. Check all air line connections and fittings.
4. Filter or control PCB faulty.
a. Return to an authorized service center for re-
pair.