Great Plains NTA607HD Operator Manual
NTA607HD Lift Assist Adjustments
Great Plains Manufacturing, Inc. 1
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General Information
This manual is an instruction guide for reducing load on
the caster wheels or for operating with the caster wheels
fully off the ground. The result will make the NTA607HD
unit more suitable for conventional soil conditions rather
than no-till conditions.
Removing weight bar sets and adjusting the pressure
reducing valve will result in less load on the caster
wheels and less severe tracks in the field, especially in
muddy conditions.
Tools Required
• basic hand tools
• a forklift or similar hoist capable of lifting a minimum of
374kg (825 lbs)
When you see this symbol, the subsequent instructions
and warnings are serious - follow without exception.
Your life and the lives of others depend on it!
Work Location
Move the implement to a flat location
Notations and Conventions
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U
F
L
D
“Left” and “Right” are facing in the
direction of machine travel. An orienta-
R
tion rose in the line art illustrations
shows the directions of Left, Right,
Front, Back, Up, Down.
B
Figure 1
Standard (3 Weight) NTA607HD
R
F
U
B
L
D
31285
© Copyright 2010 Printed 12/02/2010 166-365M
2 Great Plains Manufacturing, Inc. NTA607HD Lift Assist Adjustments
Important Safety Information
Look for Safety Symbol
The SAFETY ALERT SYMBOL indicates there is a
potential hazard to personal safety involved and extra
safety precaution must be taken. When you see this
symbol, be alert and carefully read the message that follows it. In addition to design and configuration of equipment, hazard control and accident prevention are
dependent upon the awareness, concern, prudence and
proper training of personnel involved in the operation,
transport, maintenance and storage of equipment.
Be Aware of Signal Words
Signal words designate a degree or level of hazard seriousness.
DANGER indicates an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
This signal word is limited to the most extreme situations,
typically for machine components that, for functional purposes, cannot be guarded.
WARNING indicates a potentially hazardous situation
which, if not avoided, could result in death or serious
injury, and includes hazards that are exposed when
guards are removed. It may also be used to alert against
unsafe practices.
CAUTION indicates a potentially hazardous situation
which, if not avoided, may result in minor or moderate
injury. It may also be used to alert against unsafe practices.
Prepare for Emergencies
▲ Be prepared if a fire starts
▲ Keep a first aid kit and fire extinguisher handy.
▲ Keep emergency numbers for doctor, ambulance, hospital
and fire department near phone.
Be Familiar with Safety Decals
▲ Read and understand thoroughly.
▲ Read all instructions noted on the decals.
▲ Keep decals clean. Replace damaged, faded and illegible
decals.
166-365M 12/02/2010
Important Safety Information Great Plains Manufacturing, Inc. 3
Practice Safe Maintenance
▲ Understand procedure before doing work. Use proper
tools and equipment.
▲ Work in a clean, dry area.
▲ Unfold and lower the drill, put tractor in park, turn off
engine, and remove key before performing maintenance. If
work must be performed with implement raised, use center
section lift lock and gauge lock channels provided.
▲ Make sure all moving parts have stopped and all system
pressure is relieved.
▲ Allow drill to cool completely.
▲ Disconnect battery ground cable (-) before servicing or
adjusting electrical systems.
▲ Welding: Disconnect battery ground. Protect hydraulic
lines. Avoid fumes from heated paint.
▲ Inspect all parts. Make sure parts are in good condition
and installed properly.
▲ Remove buildup of grease, oil or debris.
▲ Remove all tools and unused parts from air drill before
operation.
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4 Great Plains Manufacturing, Inc. NTA607HD Lift Assist Adjustments
Before Starting
Dense Heavy Overhead Object Hazard:
Use adequate lifting means. Use both mounts for lifting.
Keep all workers clear of area while a weight is overhead.
Keep hands away from underside of weights, and out of stackto-stack contact regions. Weight stacks have a mass of 374kg
(825 pounds). A hoist failure could result in substantial equipment damage, serious injury or death. Hands in the path of
weight movement can be crushed.
Refer to Figure 2 (6in 80-row model with blockage module)
There are three sets of weights bolted to the center
frame weldment. Remove the mid weight stack first.
This may be the only weight that needs to be removed if
it satisfactorily produces the result you desire. The only
way to judge the result is by running the unit in the field
once the weight is removed.
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1
2
1
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Before Proceeding with Instructions
Refer to Figure 3
Check caster stabilizers are properly adjusted. It is
unlikely, but casters may want to swing out of position.
Stabilizer bolts should be adjusted tightly enough to
ensure this does not occur. See “Caster Brakes” in the
lubrication section of the Operator Manual (166-283M).
Do not set cart weight transfer higher than necessary.
Values close to 1000 psi can lift the rear of an empty cart
off the ground see “Cart Weight Transfer Adjustment
(Inner Valve)” on page 6.
3
Figure 2
Weight Stacks
3
3
Figure 3
Caster Stabilizers
166-365M 12/02/2010
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