Installing Hoses On Regulators - Hobart 770 500 Owner's Manual

6-3. Installing Hoses On Regulators

1
2
3
Tools Needed:
11/16 in.
Pipe Sealant
Use only industrial grade
!
hose. Grade T hose (supplied
with kit) is acceptable for all
fuel gases. Grade R hose is for
acetylene only.
Replace hoses at the first sign
!
of any defects, flaws, or dam-
age. The hoses should other-
wise be replaced every four
years. Inspect hoses for dam-
age or leaks before each oper-
ation. Do not allow hoses to
come in contact with hot met-
al, molten solder, or corrosive
chemicals. Do not expose
hoses to fluxing agents as
these agents will deteriorate
the hose materials and cause
them to leak.
Do not splice or use damaged
!
hoses.
1 Regulator
2 Hose
3 Flow Adjustment Handle
Connect green hose to the regulator
on the oxygen cylinder. Connect red
hose to the regulator on the fuel gas
cylinder.
.
The fuel fittings have left-handed
threads.
Use wrench to tighten fittings.
NOTICE − Before opening the cylin-
der valves, turn regulator adjusting
screws all the way out to release
pressure on the regulator dia-
phragm. Pressure may damage the
regulators.
Stand with the oxygen cylinder valve
between you and the regulator.
Slowly open the oxygen cylinder
valve 1/4 turn until the tank pressure
stabilizes, then fully open the oxygen
valve to seat it in the open position.
Tighten the adjustment handle (on
the regulator adjustment screw) to
bring the pressure up to 5 psi (34
kPa). Allow oxygen to flow through
hose for about 10 seconds. Stop
oxygen flow by turning adjustment
handle counterclockwise.
Stand with the fuel cylinder valve
between you and the regulator. Us-
ing the supplied key wrench, slowly
open the fuel cylinder valve 1/4 turn
until the tank pressure stabilizes,
then open the fuel valve to a maxim-
um of one full turn (acetylene) or fully
open (all other fuel gases). Leave
wrench on cylinder so cylinder can
be shut off quickly.
Tighten the adjustment handle (on
the regulator adjustment screw) to
bring the pressure up to 5 psi (34
kPa). Allow fuel gas to flow through
hose for about 10 seconds. Stop fuel
gas flow by turning adjustment
handle counterclockwise.
161-030
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