TM 9-4931-355-14
WARNING
The R/T tester is a sealed unit which is purged
Toluol
solvent
is
toxic
and
with dry nitrogen at 90-day intervals. The unit is purged
to prevent condensation of moisture which may hinder
flammable. Use only in a well-
the operation of the unit. A purging adapter kit which is
ventilated area. Avoid prolonged or
supplied for organizational maintenance of the Sheridan
repeated breathing of the vapor.
vehicle is connected to a nitrogen cylinder and to the fill
Avoid prolonged or repeated contact
valve of the R/T tester. The fill valve is color coded
with the skin.
gray and the escape port is color coded yellow. The
b. Clean area with a wiping cloth dampened with
following procedure shall be used to purge the R/T
toluol solvent.
tester.
c. Apply primer and paint to the affected area per
a. Remove fill valve cap from the R/T tester fill
valve (1, fig. 2-1).
Air dry primer for a minimum of 1/2 hour. Within two
b. Remove screw plug from the R/T tester exhaust
hours after application of primer, apply one coat of paint
port (7, fig. 2-1).
per table 3-3.
c. Attach one end of the purging adapter kit to the
3-11. R/T Tester Purging and Charging Procedure .
nitrogen cylinder and the other end to the R/T tester fill
valve.
Table 3-3. Materials Needed For Cleaning and Touch-up Painting
Item Name
Specification
FSC
WARNING
Isopropyl alcohol is flammable. When using it for cleaning, keep it and all flammable cleaning
materials away from open flames.
Toluol solvent is toxic and flammable. Use only in well-ventilated area. Avoid prolonged or
repeated breathing of the vapor. Avoid prolonged or repeated contact with the skin.
Adhesive
RTV-8262 (General Electric Co.)
8030
Cotton, Flannel, (wiping rag)
CCC-C-458
8305
Filler, Engraving
TT-F-325, type II
8010
MIL-F-14256
3439
Identification Marking of U. S. Military Property
MIL-STD-130
MISC
Isopropyl Alcohol Grade I
TT-I-735
6810
Methyl Ethyl Ketone Technical)
TT-M-261
6810
Paint, Olive, Drab X240)87
FED-STD-595
8010
Paper, Lens Tissue
NNN-P-40
6640
Primer Coating, Zinc Chromate
MIL-P-6808
8010
Primer, Fluorescent, Pink
SS4004 (General Electric Co.)
8030
Solder, Tin Allov Sn 60
QQ-S-571 type WRMAP-2
3439
Toluol. ('leaning, Solvent
T324
6810
Waxed Cord
11737916
d. Turn the tank valve on the nitrogen cylinder
l. Allow the R/T tester to purge for at least 20
counterclockwise to open the valve.
minutes at the 141.0 psig pressure.
e. Set the pressure regulator for 141.0 psig.
m. Reduce the pressure to less than three psig.
f. Turn the control valve on the purging adapter kit
n. Install the plug screw in the R/T tester exhaust
counterclockwise to open the valve.
port.
g. Allow the R/T tester to purge for a minimum of
o. Repressurize to a pressure of 101.0 psig.
one minute.
p. Turn the control valve on the purging adapter kit
h. Turn the control valve on the purging adapter kit
clockwise to close the valve.
clockwise to close the valve.
q. Remove the purging adapter kit from the R/T
i. Allow the R/T tester to depressurize to ambient
tester fill valve.
pressure.
r. Install the fill valve cap on the R/T tester fill
j. Repeat f through i above four times and
valve.
continue with paragraph k below.
s. Close the valve on the nitrogen tank and relieve
the pressure in the purging adapter kit.
k. Turn the control valve on the purging adapter kit
counterclockwise to open the valve.
3-4
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