TM 1-1740-204-13&P
Section II. Preventive Maintenance Checks and Services (PMCS)
SECTION CONTENTS
PARA
PAGE
BEFORE YOU OPERATE
2-4
2-6
SETUP
2-5
2-7
SETTING THE HIGH PRESSURE RELIEF VALVE
2-6
2-9
SHUTDOWN PROCEDURE
2-7
2-9
LEAK CHECK AND CONFIDENCE TEST PROCEDURE
2-8
2-10
2-4. BEFORE YOU OPERATE
Always keep in mind caution and warning. Review those in the front of this manual. Handle the High Pressure Nitrogen
Servicing Cart like you would any other high pressure pneumatic equipment. See Table 2-1 for normal preventive
maintenance checks and services.
NOTE
Within the designated interval, these checks are to be performed in the order listed.
TABLE 2-1. Preventive Maintenance Checks and Services
Item
Item to be
Not Fully
No.
Interval
Checked or
Procedure
Mission Capable
Serviced
if:
1
With
each
new tank
O-ring
seal
at
tank
nipple connector
Visually inspect. Then leak test with
soap solution (item 8 of Appendix D)
after connecting to tanks.
Deformed,
cut,
missing or dry.
2
90 days
Hoses
Visually inspect
Cut, leaking
3
6 mos.
Automatic
mechanical
drain in low
pressure filter
Remove filter bowl and inspect for
less than 1/4 in. Level of water. Fill
bowl with water and verify valve
drains water down to 1/4 in. Level.
Binding or frozen;
bowl full of water
or contaminants
4
6 mos.
Wheel assembly
Visually inspect tire, valve stem and
wheel. Check tire pressure and
inflate to 60 psi.
Tire is flat, has
cuts or bruises.
Wheel is bent.
5
6 mos.
Wheel bearing
grease
Remove wheel assembly from axle
to examine bearings. Clean and
repack as necessary.
No grease, water
in bearings
6
6 mos.
Gauge damping fluid in
gauges G1 or G3 (see
figure 2-1)
Inspect gauge face plate. Refill with
glycerin (item 9 of Appendix D) via
blow out plugs to within 1/4 in. From
top of gauge face plate.
2-6
