TM 9-2330-384-14&P
5-7. GAGE MARKER ROD REPLACEMENT (Con't).
a. REMOVAL
WARNING
When working inside tank, always provide adequate forced air ventilation
at the manhole opening with air directed into compartment where work
is being performed. Forced air ventilation allows for removal of any ex-
plosive quantities and contaminants resulting from the type of work
being done and serves to prevent oxygen deficiency. Failure to follow
this warning may result in death to personnel.
NEVER work alone inside a tank: a second person must be stationed at
l
the manhole opening. The person inside the tank must have a safety line
and harness on in case of emergency for rescue operations. If a rescue
operation is required, summon assistance IMMEDIATELY. DO NOT at-
tempt a rescue until assistance has arrived.
Remove gage marker rod (1) from attachment to manhole collar (2), if present.
b. INSTALLATION OF GAGE MARKER ROD
WARNING
When working inside tank, always provide adequate forced air ventilation
at the manhole opening with air directed into compartment where work
is being performed. Forced air ventilation allows for removal of any ex-
plosive quantities and contaminants resulting from the type of work
being done and serves to prevent oxygen deficiency. Failure to follow
this warning may result in death to personnel.
NEVER work alone inside a tank: a second person must be stationed at
the manhole opening. The person inside the tank must have a safety line
and harness on in case of emergency for rescue operations. If a rescue
operation is required, summon assistance IMMEDIATELY. DO NOT at-
tempt a rescue until assistance has arrived.
DO NOT perform any welding procedure unless tank is purged. Failure to
follow this warning will result in serious injury or death to personnel.
NOTE
Illustrations show proper location of gage marker rod (1) when installed.
To ensure proper calibration, gage marker rod must be installed accord-
ing to specifications given.
Refer to TM 9-237, Operator's Manual for Welding Theory and Applica-
tion, for proper welding procedures.
(1)
Position gage marker rod (1) at manhole collar (2). Rod must be placed 2 in. (5.1 cm) to
curbside of rear midpoint of manhole collar. Top of rod must be placed 1 in. (2.5 cm) from
lower flange of collar.
(2)
Weld gage marker rod (1) to manhole collar (2).
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