Attaching Hoses To Torch Flashback Arrestors/Check Valves; Attaching Cutting Attachment To Torch Handle - Hobart 770 500 Owner's Manual

6-4. Attaching Hoses To Torch Flashback Arrestors/Check Valves

2
3
Tools Needed:

6-5. Attaching Cutting Attachment To Torch Handle

1
OM-254 957 Page 10
4
11/16 in.
Pipe Sealant
Do not use petroleum-based
!
pipe sealants.
Flashback
!
valves are factory installed on
the torch handle. Do not re-
1 move these components.
.
The hex nut on the fuel hose has
notches on the corners. The hex
nut corners are smooth on the
oxygen hose.
1 Torch Handle
2 Fuel Hose (Red)
3 Oxygen Hose (Green)
4 Flashback Arrestors/Check
Valves
Flashback arrestors/check valves
are designed to prevent the reverse
flow of gases and stop a flashback
from going beyond the point where
they are installed.
Attach fuel hose (red) to fuel inlet
fitting on torch flashback arrestor. The
nut on the fuel hose has left-hand
threads.
Attach oxygen hose (green) to oxy-
gen inlet fitting on torch flashback
arrestor. The nut on the oxygen hose
has right hand threads.
Use supplied wrench to tighten
connections.
Do not use cutting attach-
!
ment if the o-rings are miss-
ing or damaged.
Do not use petroleum-based
!
pipe sealants.
.
See Section 6-7 for attaching
brazing tip to torch handle.
2
1 Cutting Attachment
2 Torch Handle
The cutting attachment uses two
o-rings to seal the connection to the
torch handle. If replacing the cutting
attachment, be sure the o-rings are
properly installed.
Attach cutting attachment to torch
handle.
Use wrench to tighten connections.
arrestors/check
161-031
Tools Needed:
3/4 in.
Pipe Sealant
161-032