Great Plains NP4000B Operator Manual - Manual (Page 43)

Great Plains Manufacturing, Inc. Table of Contents Index Preparation and Setup 39
2014-05-14 Table of Contents Index 417-199M
Refer to Figure 11
2.
Check the pressure gauge . If it is not 0,
STOP.
Discharge the system before resuming hitching.
See page 118.
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 118.
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 118.
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
A28
A29
A28
A29
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 rope routes that are too vertical.
A rope running at a high angle may fail to fully close the valve.
Note: On a 2-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
31076
1
A18
A18
A18
A13
A18
1