Great Plains NP4000B Operator Manual - Manual (Page 30)

26 2013+ NP4000/A/B Table of Contents Index Great Plains Manufacturing, Inc.
417-199M Table of Contents Index 2014-05-14
The following callouts are for trailing nurse tank cart
components. See the “Using Anhydrous Ammonia
Safely” manual (407-551M) for all nurse tank callouts
(
- ). The present manual lists only those required
for applicator field operations.
A56.Acme Parking Plug
A threaded stud (or other means) for storage of the
outlet hose when not coupled to the applicator.
A57.Acme Female Hose Coupler
This end of the hose connects the tank withdrawal
valve
to the leading applicator inlet at the
breakaway coupler. For use with a Nutri-Pro
®
applicator, the outlet end of the hose must be
equipped with a 1
3 ⁄
4
-4 female Acme fitting.
The outlet end of the hose has a swivel collar
a
or
shroud containing the female Acme fitting. This
allows connection without needing to twist the hose.
Acme hose couplers are intended for hand
tightening only. Do not use tools to make the
cart-applicator connection. A liquid-tight seal is
made by the gasket in the male Acme fitting on the
applicator break-away coupler.
For dual-tank carts, each tank usually has its own
hose.
A58.Outlet Hose Assembly
The hose may have zero, one or two operating
valves
, one or more bleed valves , and a
hydrostatic relief valve . The outlet end may
have an Acme. plug.
A59.Nurse Tank Hose Body
NH
3
hoses are time-dated components. Operator
action is to replace the assembly when it
reaches the end of its operating life.
A60.Hose Valve(s)
The hose may have zero, one or two operating
valves
.
Excess NH
3
Release Hazard:
If the outlet hose is entirely dismounted (both ends free)
for transport and storage, and both ends are 1
3 ⁄
4
-4 Acme,
be sure about which end is which. Installing a hose
backwards can result in needless excess NH
3
release at
unhitching, or a line segment unprotected by bleed
and/or relief valves.
a. Acme collars may be aluminum, but all internal coupler components must be NH
3
-safe, typically stainless steel.
A51 A86
A63 A12
Hose valves are typically hand wheel valves, or
lever valves. Read any documents provided for the
valves. Have the terminal or dealer explain how the
valves work.
Suffocation, Blinding and Burning Hazards:
Never test an anhydrous ammonia hose valve unless you
are absolutely certain the hose and valve bodies are
empty, or both hose ends are securely connected to
sealed systems.
▲ A two-valve hose can contain a substantial amount of
NH
3
even when completely disconnected. See “Avoid
Line Traps” on page 116.
▲ Older ball valves can contain NH
3
inside the ball
when closed, even though disconnected at both ends.
See “Avoid Ball Traps” on page 117.
Follow instructions for bleeding and checking. Never use
a valve handle as a carrying handle. Keep hands clear of
bleed valves when carrying a hose.
Excess NH
3
Release and Trapping Hazards:
Understand hose and tank withdrawal valve functions
and sequencing. This manual presumes a hose with a
single outlet-end shut-off valve
, and a tank outlet
with a withdrawal valve . If the hose in use is
different, have the hose provider explain the correct
order for operations.
A60 A61
A62
A58
A60
A60
A65