Maintenance And Troubleshooting; Before Using - Miller MTL-17 Owner's Manual

SECTION
4
MAINTENANCE & TROUBLESHOOTING
4..
~.
~
V~
~
READSAF
of manual
ETYBLOCKSatbeginning
before proceeding.
Figure 4-1.
Maintenance Schedule
Table
4-1.
Troubleshooting
N OTE
1
Before using
troubleshooting table,
check selection and
preparation of
tungsten
electrode according to
Section
5.
Trouble
Remedy
Lack of high frequency~ difficulty in establishing
~
Check cables and torch for cracks
or
bad connections. Be
sure
that
torch
cables
arc.
Torch gas valve
not
working properly
-~
are
not close to
any
grounded metal. Repair
or
replace
necessary parts.
Check welding
power source
high frequency control. and if necessary. check
and
adjust spark
gaps.
Have Factory Authorized Service Station/Service Distributor check valve.
(if applicable).
Wandering
arc poor
control of direction of
arc.
~
-..j
Reduce gas flow
rate.
Tungsten electrode oxidizing and
not
remaining
-~
Shield weld
zone
from drafts. Check and tighten all
gas
fittings.
bright
after conclusion of weld.
Increase postflow time.
Check gas valve.
Turn Off all power before
maintaining.
~~Replace
Cracked
Parts
3-1, 3-3
Torch Body
Gas
Hose
Torch Cable
.
OM-1563 Page 5