Great Plains NTA3007 Operator Manual - Manual (Page 36)

32 NTA907 or NTA3007 Table of Contents Index Great Plains Manufacturing, Inc.
166-371M Table of Contents Index 2012-07-02
Heights and Levelling
All frame sections must be at the correct height and level
to maintain even planting depth.
Periodic frame-levelling adjustments should not be
necessary. If you are having problems with uneven
depth, check drill levelness and follow these procedures.
1. Complete “Bleeding Hydraulics” on page 128.
2. Unfold the drill fully (page 34).
Set Tongue Height
Drill must be unfolded for this procedure.
Refer to Figure 17
Set the initial tongue height, tractor hitch, and changing
implement hitch configuration as necessary. Distance is
measured at top of tongue to ground level
If desired height cannot be attained with normal range of
hitch, hitch may be relocated in tongue bolt holes.
Always have two bolts in use, through two sets of hitch
holes and two sets of tongue holes.
Checking Drill Height
The drill is designed to operate with all sections of the
main tool bar nominally 76.2 cm (30 inch) above the
planting surface. The height of the centre section is not
routinely adjustable. Set planting depth with row unit
adjustments.
When lowering the drill for the first time on the planting
ground:
1. Completely lower the main tool bar. If necessary, first
lift off transport locks, remove and stow locks.
2. Set hitch to planting height.
3. Pull forward a meter or so (a few feet).
Mis-Adjustment Risk:
Drill must be fully lowered to field position (with openers into
ground) and hitch height must be set before making
side-to-side adjustments.
Refer to Figure 18
4.
Check tool bar height across drill. See page 145 for
further detail and adjustment.
Marker Setup
Prior to first use, check and adjust:
• See “Initial Marker Setup” on page 183.
Prior to each planting session, check and adjust:
• See “Marker Disc Adjustment” on page 115.
Figure 17
Initial Tongue Height
29523
49.5 cm
(19.5 in)
Note: Level frame in planting conditions.
Failure to do so may result in implement not
producing desired results.
Figure 18
Tool Bar Height Check
29519