NP30A or NP40A
Preparation and Setup
31
2019-03-11
407-502M
2- and 3-Point Hitching
The NP30A or NP40A is engineered to be used with
Category II or Category III tractors.
This applicator is factory set for Category III tractors.
Category II requires an optional hitch pin kit (see
page 132).
In addition, the following bushings (not supplied by Great
Plains) may be needed to fit your quick hitch or tractor’s
3-point arms:
• Upper Link (full 3-point only):
1 inch (25.4 mm) I.D. x 1
1
/
4
inch (31.8 mm) O.D.
• Lower Links:
1
1
/
8
inch (28.6 mm) I.D. x 1
7
/
16
in (36.5 mm) O.D.
1. Adjust tractor lower links to maximize lifting height.
2. Normally the lower arms engage pins in the lower
holes of the applicator’s three point lugs. You may
use the upper holes if necessary.
3. Set tractor sway blocks to minimize side sway. Set
tractor hitch lift control to Float.
4. Back tractor up to applicator. Align lower links with
the lower hitch clevis on applicator. Adjust hitch
bushings and spacers supplied with applicator
according to the category of your tractor. Lock pins in
place.
5. Set hitch for depth control mode.
Full 3-Point Hitching
For 2-Point hitching (3-Point semi-mounted), continue at
” (next topic).
Determine which top holes to use:
Attach tractor top link to applicator upper hitch clevis.
For intended results, the frame must be level side-to-side
and front-to-back. This must be done in the field, and
cannot normally be established at first hitching. See
Upper
Category III
Middle
Category III Quick Hitch
Category III
Category II
a
a. Requires an optional hitch pin kit (page 132)
Lower
Category II
Quick Hitch
Figure 7
3-Point Hitch Pins
21673
U
D
L
R
Category III
Category II
1
2
Crushing Hazard:
Do not stand or place any body part between
applicator and moving tractor. You may be
severely injured or killed by being crushed
between the tractor and applicator. Stop tractor engine and set
parking brake before attaching cables and hoses.
Figure 8
3-Point Top Pins
31078
U
D
B
F
3
4
5