
NP2540
Maintenance and Lubrication
117
2019-04-12
417-459M
Normal Discharge
At the completion of stopping application and nurse tank
unhitching, all line valves are closed and all bleed valves
are open, and have been that way for at least an hour.
Transport may also have occurred, which aids clearing.
1. Verify that all line valves are closed, and all bleed
valves open. If this is not the case, there is risk of
trapped ammonia. See “
2. Carefully walk down-wind of the applicator. Check
for ammonia odor. If pungent, there is at least some
pure NH
3
vapor in the system, and possibly some
liquid. Give the applicator some time to vent.
If there is no, or only mild odor, check the delivery
loops for visible fluid. If only a few hours have
elapsed since application ended,
this liquid is pure
NH
3
. Stay away until it has vaporized.
3. From up-wind, check all the fittings and lines. If any
are cold (more than a few degrees below ambient
temperature), liquid evaporation is still in progress or
has only recently completed. Give the applicator
more time to vent.
Steps continue on next page...
System Blow-Out
4. To rapidly reduce the vapor in the system to trace
amounts, use compressed air at the Acme inlet
.
a. You will need to have the console connected to
the meter harness and powered up. Have the
console up-wind of the applicator.
b. If liquid NH
3
is suspected to be present, lower
the tines into the ground.
c. Connect the air hose to the Acme inlet
. Use
hose extensions as needed to perform this
blow-out outdoors. You also need a connection
at the Acme inlet that does not rely on a person
standing there to maintain it.
d. Open all line valves.
Open the emergency shut-off valve
.
On the console, turn the POWER switch on,
MASTER switch on, and
BOOM 1 switch on, and
any section valves ON.
Command a high rate.
e. Set the air source regulator to no more than
150 psi.
f.
Flow air through the system until odor falls to
acceptable levels.
Figure 79
Delivery Loops
34983
If there is ammonium hydroxide (NH
3
) fluid (or merely
condensed water) in the delivery loops, this blow-out
procedure may remove some, but not all, of that fluid.