A29 a28, 1a18 – Great Plains NP30A 30-foot Operator Manual User Manual
Page 37
Great Plains Manufacturing, Inc.
Preparation and Setup
33
2014-05-20
407-502M
Refer to Figure 11
2.
Check the pressure gauge
. If it is not 0,
STOP.
Discharge the system before resuming hitching.
See page 110.
3.
From up-wind, and with the bleed valve orifice
pointing away from you, slowly open the cooler bleed
valve
If any liquid appears, or vapor at high
pressure, close valve and
STOP.
Discharge the system before resuming hitching.
See page 110.
Once there is no vapor flow at the bleed valve, close
it and continue at the next step.
Refer to Figure 12
4.
Check the state of the emergency shut-off valve
.
If the valve
is closed, NH
3
may be trapped on the
cooler side of the valve. Continue at step 5.
If the valve
is open, step 3 above has already
verified that the line is discharged on both sides of
valve
. Close bleed valve and continue at step 6
5.
Standing up-wind, and with the bleed valve orifice
pointing away from you, slowly open the breakaway
coupler inlet bleed valve
. If any liquid appears, or
vapor at high pressure, close valve and
STOP.
Discharge the system before resuming hitching.
See page 110.
Once there is no vapor flow at the bleed valve, close
it and continue at the next step.
Refer to Figure 12 (which depicts the shut-off valve closed)
6.
If the emergency shut-off valve
was closed, open
it.
7.
Locate the emergency rope
.
8.
Inspect the attachment of the rope to the valve
handle, and the rope itself. Replace the rope if cut,
frayed or worn. If the handle connection is not
secure, take corrective action.
9.
Uncoil the rope. Remove any knots.
10. Route the rope forward and above the plumbing
center-line (but otherwise near center-line), toward
the tractor cab. Avoid having the rope rest on or rub
against any applicator or tractor parts that could
cause a snag or abrasion. Avoid running too far
sideways, or operation may bend the handle.
11. Route the rope into the tractor cab.
12. Test each rope. Make sure each rope can quickly
and smoothly close its valve.
Figure 11
Cooler Bleed Valve
31587
A18
A18
Rope Function Hazard:
Avoid rope routes at or below plumbing centerline.
Routes below plumbing center-line cannot operate the valve.
Routes at plumbing center-line may fail to operate the valve.
Avoid routes that are too vertical.
A rope running at a high angle may fail to fully close the valve.
Note: On a 2-point or 3-point applicator, the tractor cab
may be high enough to provide the angle needed.
On a pull-type applicator, it may be necessary to
route the rope(s) over the transport rest.
Figure 12
Emergency Shut-Off Rope
99998
1
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1