TABLE 2-1. Preventive Maintenance Checks and Services (Cont'd)
Item to be
Leak check by pressurizing system with
output valves shut off. Soap bubble test
per paragraph 2-8.
Check that valve vents at no higher than
4,200 psi per paragraph 2-6.
Relief valve does not vent.
Paint, item 7 of
Visually inspect for corrosion, chipping
and worn areas. Treat corrosion and
touch up per TM 43-0139
Nitrogen tanks must be secured tightly to the hand truck's saddles. Loose or unsecured tank
retention straps will allow the tanks to shift during towing. This could damage the tank
connectors, hoses or tow vehicle.
The maximum safe towing speed for the High Pressure Nitrogen Servicing Cart is 15 miles per
hour. Do not exceed this speed.
To set up the cart, follow these procedures:
Verify that the high pressure charging hose is connected to the high pressure output port labeled HIGH
Place one or two pressurized, 230 cu ft nitrogen tanks into the saddles of the hand truck. Roll each tank into its
saddle. Adjust the upper and lower pairs of tank retention straps until they hold the tanks securely.
Refer to Figure 2-2. Inspect the O-ring at the end of the nipple connector (1) for cuts and bruises. Connect each
tank to its connector by inserting the nipple connector (1) into the tank connector port (2), fully seating the
connector (1) and turning the knurled hand nut (3) until it is hand tight.
Leave the tank valve(s) completely closed until ready for use. Refer to Figure 2-1. Before any test or operation
of the unit, verify that the following controls are properly set:
-Back off both low pressure regulator, R1, and high pressure regulator, R2, by turning the T-handles counter-
clockwise until they spin freely.