Maintenance Instructions - ESAB C-84-42 Manual De Instrucciones

MAINTENANCE INSTRUCTIONS

For all repairs other than those covered below,
send the torch to an ESAB Remanufacturing Cen-
ter, Ebenezer Road, Florence, SC 29501, or to your
ESAB welding equipment distributor. Improperly
repaired apparatus is hazardous.
Preheat Valves: Leakage around either throttle
valve can almost always be corrected by tightening
the packing nut slightly.
If either preheat valve will not shut off completely,
loosen the packing nut and remove the throttle as-
sembly from the body. Wipe the seat on the valve
stem, and the seating surface in the body, with a
clean cloth. Then reinstall the valve assembly and
retighten the packing nut. If the valve still leaks, in-
stall a new throttle valve assembly. After you do so,
tighten the packing nut until you find it extremely
difficult to turn the valve wheel. Set the unit aside
for a few hours to set the packing. Then loosen the
packing nut until the valve stem turns readily.
If leakage though either preheat valve is still evi-
dent after a new throttle valve assembly has been
installed, send the torch to your distributor for
reseating.
Cutting Valve: If leakage is detected between
the cutting valve, or if the valve fails to shut off
completely when cutting oxygen valve lever is
released, unscrew the lock screw (see illustration)
with a spanner wrench. When the thread is fully
disengaged, lift out the valve assembly. Then tilt
the torch and let the valve spring drop out in your
hand.
Now pull the lock screw off the valve stem and
remove seat and retainer from the stem. Examine
the stem carefully. If either the seating surface or
the cylindrical section that runs in the valve screw
is marred, replace the stem with a new part. Always
replace the seat with a new part. Replace the small
'O'-ring in the lock screw with a new part if there
has been leakage around the valve stem. Inspect
the large 'O'-ring and replace it if it is not in excel-
lent condition. Place new seat on stem, slide on the
retainer, and insert stem in lock screw (be sure the
lock screw has both 'O'-rings in position). Finally,
slide valve spring into body, insert valve assembly,
and tighten lock screw.
Cleaning Cutting Nozzles: If the cutting nozzle does
not produce straight, uniform flames, or if any of
the nozzle orifices become clogged, clean them by
hand with the correct size twist drills shown in the
table on page 4, or with OXWELD tip cleaners. (The
relationship between OXWELD tip cleaners and
drill sizes is shown on the tip cleaner case.)
To clean the preheat slots on internal nozzles,
remove the external sleeve and use a soft bristled
brush (750F99).
For longer life, nozzles should be cleaned peri-
odically in a solution of OXWELD Nozzle Cleaning
Compound (P/N 761F00) made up and used as
directed on the jar in which it is packed.
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