GREAT PLAINS NTA607HD Bedienungsanleitung

Great Plains Manufacturing, Inc. 1

NTA607HD Lift Assist Adjustments

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)

Work Location

Move the implement to a ﬂat location

Notations and Conventions

Null4: 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!

Figure 1

Standard (3 Weight) NTA607HD

31285

Null4:“Left” and “Right” are facing in the

direction of machine travel. An orienta-

tion rose in the line art illustrations

shows the directions of Left, Right,

Front, Back, Up, Down.

2Great Plains Manufacturing, Inc. NTA607HD Lift Assist Adjustments

166-365M 12/02/2010

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 fol-

lows it. In addition to design and conﬁguration of equip-

ment, 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 seri-

ousness.

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 pur-

poses, 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 prac-

tices.

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.

Important Safety Information Great Plains Manufacturing, Inc. 3

12/02/2010 166-365M

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.

MetaData: End of <Safety Topics>

Null4:

4Great Plains Manufacturing, Inc. NTA607HD Lift Assist Adjustments

166-365M 12/02/2010

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 stack-

to-stack contact regions. Weight stacks have a mass of 374kg

(825 pounds). A hoist failure could result in substantial equip-

ment 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.

Null4:

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.

Figure 2

Weight Stacks

Figure 3

Caster Stabilizers

Remove Mid Weight Set Great Plains Manufacturing, Inc. 5

12/02/2010 166-365M

Remove Mid Weight Set

Refer to Figure 4 and Figure 5

1. Remaining clear of seed towers and hoses, disas-

semble mid weight set from the center frame

tubes .

Remove the 1⁄2x11⁄2in bolt , hex nut and lock

washer from each top mount that hook the mid

weight and rear weight top mounts together.

(Retain bolt, nut and washer by securing them back

in the top mount holes of the mid weight after the

stack is removed.)

2. Remove the two weight bracket bolt channels that

keep the weights attached to the frame (only the left

one is visible in Figure 4). This requires removing the

nut and lock washer on the bottom of the bracket

securing each 5⁄8x9in bolt .

When you take the nut off the bolt should slip out.

Before Proceeding:

The individual weight bars, two top mounts and long

weight mount channel weldment remain assembled as

one unit.

3. There are two weight bracket mounts on the top of

each stack of weights. Secure lifting hooks or chains

to these two mounts on the mid weight. (Take up

slack gradually to avoid deforming mounts. Minimize

load sway to avoid damage to nearby objects and the drill.)

4. Hoist mid weight up and away from implement. Place

in storage along with the two weight bracket bolt

channels (Note: channels may be used later).

Adjust Back Pressure

5. To manipulate the amount of down force:

In addition to removing the mid weight stack you will

need to adjust the back pressure at the pressure

reducing valve located on the left wing. See “Adjust

Weight Transfer Valves” on page 6.

Figure 4

Remove Mid Weight Stack

31736

Figure 5

Place Hooks on Top Weight Mounts

6Great Plains Manufacturing, Inc. NTA607HD Lift Assist Adjustments

166-365M 12/02/2010

Adjust Weight Transfer Valves

Refer to Figure 6 and Figure 7

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. As a cart nears empty, the main tires can begin to slip,

or stop turning altogether, resulting in irregular seeding rates

or stoppages.

Wing Weight Transfer Adjustment (Outer Valve)

Note: This valve will most likely not need adjusting. It will

already be set to meet your requirements.

1. Release lock ring on wing-transfer valve .

Adjust knob while observing gauge .

Increase weight transfer to wings by turning knob

clockwise. Reduce weight transfer to wings by turn-

ing knob counter-clockwise.

Set pressure to at least 250 psi.

Secure setting with lock ring.

Cart Weight Transfer Adjustment (Inner Valve)

Note: This valve will need adjusting to get the results

you require.

2. Release lock ring on cart-transfer valve .

Adjust knob while observing gauge .

Increase weight transfer from cart by turning knob

clockwise. Reduce weight transfer from cart by turn-

ing knob counter-clockwise.

Set pressure to at least 100 psi.

Secure setting with lock ring.

3. Pull forward in ground. Assess opener penetration,

and coulter (option) penetration. Compare wings to

center section.

4. During ﬁeld operations, monitor coulter and opener

depth of wings and center section. Adjust weight

transfer as required for consistent depth across drill.

5. Once the cart weight transfer has been adjusted,

adjust the rear lift assist adjustment linkage as

described in “Adjust Linkage” on page 7.

Figure 6

Pressure Reducing Valve

Inner Valve Controls Cart

Outer Valve Controls Wings

31192

To avoid planting problems, do not exceed 1500 psi for wing-

transfer, and 1000 psi for cart-transfer. A relief valve prevents

operating the wing-transfer at over 1500 psi.

3 1

4 5

Figure 7

Pressure Reducing Valve Decals

Cart: Decal on Left

Wing: Decal on Right

6 2

7 8

Adjust Linkage Great Plains Manufacturing, Inc. 7

12/02/2010 166-365M

Adjust Linkage

Refer to Figure 8

The factory setting of the lift assist link has approximately

7.62cm (3in) of exposed threads outside the ﬁxed end of

the lift assist link. Adjust the link (extend it out) by only

2.54cm to 3.81cm (1 to 11⁄2in). Anymore than that could

be unsafe and lead to machine damage.

Caster Failure Hazard:

Never exceed 13.97cm (51⁄2in) of exposed threads on the lift

assist adjustment link. Exceeding this measurement could

result in linkage failure leading to severe machine damage,

bodily injury or death.

1. With drill (unfolded and lowered) place a jack stand

underneath the rear part of the frame near the caster

wheels. Support is required to take weight off the

casters for ease of adjustment. If you do not have a

jack stand, an alternative method to reduce weight

on the casters is to do the following four steps:

• turn the 90 degree ball valve on the fan to trans-

port position

• activate the tractor remote lever to supply oil to

the fan/weight transfer circuit

• set the cart weight transfer to 100 psi

• set the wing weight transfer to the maximum

pressure setting of 1500 psi.

2. Measure from the inside face of the square nut to

the inside face of the adjuster nut (see Figure 8).

The factory setting is approximately 7.62cm (3in).

Adjust it out 2.54cm (1in) to start with. The measure-

ment from the face of the square nut to the face of

the adjuster nut will now be 10.16cm (4in).

3. Determine if adjusting the link 2.54cm (1in) provides

a satisfactory result. See “Determine Results” on

page 8. If frame drops back too much it indicates

there is still too much weight. Follow instructions for

removng rear weight set.

Link Adjust Thread

Measurement

PW Transport

Clearance Comments Casters

factory set 7.62cm (3in) 27.94cm (11in) factory setting

2.54cm (1in) 10.16cm (4in) 22.86cm (9in) moves casters 10.16cm (4in)

more than factory setting

3.81cm (1.5in) 11.43cm

(4.5in) 20.32cm (8in) maximum recommended link

adjustment

moves casters 15.24cm (6in)

more than factory setting

5.08cm (2in) 12.7 (5in) 17.78cm (7in) not recommended

start losing PW clearance

moves casters 20.32cm (8in)

more than factory setting

6.35cm (2.5in) 13.97cm

(5.5)in

less than12.7cm

(5in)

NEVER EXCEED UNSAFE thread engagement not enough

for safe transport

Figure 8

Adjust Lift Assist Link

Null4:

31755

Null4:

31747

8Great Plains Manufacturing, Inc. NTA607HD Lift Assist Adjustments

166-365M 12/02/2010

Determine Results

1. Run implement in ﬁeld.

2. If removing the mid weight stack satisfactorily gets

the result you desire (the tires are off the ground as

you want) you are done. Make sure to reset valve:

back pressure must be set to at least 100 psi.

3. If the result is not satisfactory and further adjustment

is desired it will be necessary to set the pressure

back down and then proceed with the rest of these

instructions to remove the rear set of weights.

Insufﬁcient Opener Weight Risk:

It is not recommended to remove the front weight stack. If the

implement is used in heavier till ﬁeld conditions there will be

insufﬁcient down force over the coulters for penetration in the

soil.

Remove Rear Set of Weights Great Plains Manufacturing, Inc. 9

12/02/2010 166-365M

Remove Rear Set of Weights

Refer to Figure 9

About the Weights

The 6in 80-row drill model has an extra (ﬁfth) blockage

module that the other models (6in 40-row, 7.5in 32-row,

7.5in 64-row) do not require. It is mounted on the double

shoot blockage module mount on the rear set of

weights . It needs to be dismantled and moved as per

the following instructions. If the implement you have does

not have this mount bracket, disregard references to it

and follow all other instructions.

Remove Rear Weight Set

1. If you have the double shoot 6in 80-row model:

Remove double shoot blockage module mount

keeping DICKEY-john®module attached and save

along with any hardware to remount. This will be

remounted in Step 5 to the angle tower bracket.

2. Remove the 5⁄8x9in bolts at either end of the two

center tower mount brackets that the rear weight

stack is bolted to (only left frame side is visible in

Figure 9). The U-bolt remains permanently

attached.

3. Secure lifting hooks or chains to the two mounts

on the top of the rear weight stack. (Take up slack

gradually to avoid deforming mounts. Minimize load

sway to avoid damage to nearby objects and the

drill.)

4. Hoist rear weight stack up and away from imple-

ment and place in storage along with all associated

hardware.

Reattach Mount Bracket and Module

Refer to Figure 10 and Figure 11

5. If you have the double shoot 6in 80-row model:

Attach double shoot blockage module mount

bracket with attached DICKEY-john®module

to upper set of holes in double shoot tower mount

angle bracket (Figure 10) using two bolts cur-

rently in place on the tower bracket.

Note: This bracket must be centered to connect to all

seed hoses.

Figure 9

Rear Weight Stack

31738

Figure 10

Blockage Monitor Mount Bracket

12 17

10 Great Plains Manufacturing, Inc. NTA607HD Lift Assist Adjustments

166-365M 12/02/2010

Reattach Bolt Channel Brackets

6. Take the two weight bracket bolt channels and two

5⁄8x9in bolts per bracket that were removed from

the bottom of the mid weight set and remount one

each on top of the left and right frame tubes as pic-

tured (Figure 10 and Figure 11).

Adjust Back Pressure

7. To manipulate the amount of down force:

In addition to removing the rear weight stack you

should adjust the back pressure at the pressure

reducing valve located on the left wing See “Adjust

Weight Transfer Valves” on page 6.

Null4:

Determine Results

1. Run implement in ﬁeld.

2. If removing the rear weight stack satisfactorily gets

the result you desire (the tires are off the ground as

you want) you are done. Make sure to reset pres-

sure valve: back pressure must be set to at least

100 psi.

Insufﬁcient Opener Weight Risk:

It is not recommended to remove the front weight stack. If the

implement is used in heavier till ﬁeld conditions there will be

insufﬁcient down force over the coulters for penetration in

the soil.

Figure 11

Weight Bracket Bolt Channels

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