6-3. OXYGEN CONTROL VALVE
The oxygen control valve is disassembled as part of a major overhaul of the torch kit system, when
damaged, when obstructed, or when an oxygen leak is detected. During the normal course of
operations it should not be necessary to disassemble the oxygen control valve.
The repair procedure calls for securing brass/aluminum components in a vise. Brass/aluminum is a
soft metal that bends or distorts easily. Damage to torch parts can affect fit-up and cause oxygen
leakage, making the torch unsafe to operate.
a.
Disassembly.
1) Using a 3/8" open end wrench to hold the brass lock nut and a flat tip screwdriver, unscrew
the oxygen control lever screw from the brass lock nut and remove the oxygen control lever
from the torch body.
2) Secure the torch body with the control valve nut facing up.
The valve spring is under tension and may cause an uncontrolled separation
of the control valve nut from the torch body.
Use caution to avoid damaging the valve nut gasket.
3) Using a 13/16" box end or socket wrench, unscrew and remove the control valve nut from the
torch body.
4) Separate the valve stem spring from the valve stem.
5) Separate the valve stem from the control valve nut.
6) Separate the valve stem washer from the valve stem.
7) Do not remove the valve stem o-ring unless it has first been determined the o-ring will be
replaced.
8) Do not remove the valve nut gasket unless it has first been determined the gasket will be
replaced.
b.
Inspection.
1) Inspect the brass lock nut, oxygen control lever screw, the oxygen control lever, the control
valve nut, the valve stem spring and the valve stem for damage or wear. Replace as required.
2) Inspect the valve stem washer, valve stem o-ring, and the valve nut gasket for cuts or
deformation. Replace as required.
CAUTION
CAUTION
