Great Plains 2020 User Manual

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03-01-92

2020 SOLID STAND

DRILL

FLAT FOLD

MARKER

OWNER’S MANUAL

Great Plains Manufacturing, Inc.

P.O. Box 218

Assaria, KS 67416

[phone]

03-01-92

INTRODUCTION

Your 2020 Solid Stand Flat Fold Marker is designed to give you many years of dependab le service. This manual has
been prepared to instruct you on how to service and keep your marker operating in good condition. Read and f ollow
ALL instructions and safety precautions carefully.

The parts on your 2020 Solid Stand Flat Fold Marker have been specially designed. Should your Flat Fold Marker
ever require replacement parts, go to your Great Plains Dealer.

Thank you for buying an Great Plains Flat Fold Marker.

TABLE OF CONTENTS

Introduction .....................................................2

Table Of Contents ...........................................2

Nut & Bolt Torquing Chart ...............................2

Safety Rules & Features 3

Bleeding the Hydraulics...................................4

Cycling the Markers.........................................4

Flat Fold Marker Assembly Instructions...........5

Flat Fold Marker Parts Illustration....................7

Single Marker Hydraulic Assembly 9

Dual Marker Hydraulic Assembly...................11

Service ..........................................................14

Rod Cylinder {810-118C}...............................15

Warranty .......................................................18

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NUT & BOLT TORQUING CHART

This chart is based on torque requirements in foot pounds for grade 5 bolts.

BOLT DIAMETER MINIMUM TORQUE MAXIMUM TORQUE BOLT DIAMETER MINIMUM TORQUE MAXIMUM TORQUE

1/4” 9 11 3/4" 270 324

5/16" 17 20 7/8" 400 480

3/8" 35 42 1" 580 696

7/16" 54 64 1 1/8" 800 880

1/2" 80 96 1 1/4" 1120 1240

9/16" 110 132 1 3/8" 1460 1680

5/8" 150 180 1 1/2" 1940 2200

NOTE: Torque requirements listed above do not apply to self-locking nuts. For self-locking nuts increase torque
requirements listed above by 15%.

113-379M
Effective 03-01-92

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SAFETY RULES & FEATURES

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The SAFETY ALERT SYMBOL indicates that there is a potential hazard to personal
safety involved and extra safety precautions 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 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.

Most accidents are the result of negligence and carelessness, usually caused by failure of the
operator to follow simple but necessary safety precautions. The following safety precautions are
suggested to help prevent such accidents. The safe operation of any machinery is a big concern
to consumers and manufactures. Your Flat Fold Marker has been designed with many built-in
safety features. However, no one should operate this product before carefully reading this Own
er’s Manual.

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1. DO NOT allow anyone near the marker while it is in operation.

2. Excessive speed can cause marker damage.

3. DO NOT allow anyone near the grain drill while cycling the markers.

4. Reduce speed while transporting over uneven or rough terrain. Avoid all chuck holes and
washboard areas in roads.

5. DO NOT lubricate, adjust or repair the marker while it is in operation.

6. When in transport, use accessory lights and devices for adequate warning to operators of oth­er vehicles and use safety chains. Comply with ALL Federal, State and Local Laws when
traveling on public roads.

7. DO NOT permit smoking, sparks or an open flame where combustible lubricants or liquids
are being used.

8. Escaping fluid under pressure can have sufficient force to penetrate the skin. Check

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all hydraulic lines and hoses for leaks before applying pressure. Use paper or cardboard and
not body parts to check for suspected leaks. If injured seek immediate medical assistance
from a doctor familiar with this type of injury.

9. Refer to parts illustration on page 7 for the following instructions. The marker arm (#17) is
attached to the marker body with a 3/8” shear bolt (#14). If excessive force is put on the
marker during operation, the shear bolt will break allowing the marker arm to swing away
thereby reducing the damage that could be caused otherwise. Should this occur, replace the
bolt with a 3/8” x 2” long Gr 2 bolt only. {Great Plains part number 802-266C.}

03-01-92

BLEEDING THE HYDRAULICS

1. Be sure tractor hydraulic reservoir is full.

2. With the markers in field position, crack the hydraulic hose fittings located at the base end of

the cylinder(s). With your tractor at an idle speed, activate your tractor hydraulic’s valve until h y
draulic oil seeps out around the hose ends. Tighten the hose end fittings and repeat this process
with the hose end fitting(s) located at the rod end of the cylinder(s).

3. Fold and unfold the marker(s) slowly in order to work all the air out of your mark er hydraulics.

4. Adjust the speed of the marker with the needle valve, single markers only, to a low setting.

Fold the marker up and down a few times and recheck f or pinching and kinking of hoses. Reset
folding speed with the needle valve to a safe speed.

CYCLING THE MARKERS

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THE MARKERS CYCLE IN THE FOLLOWING SEQUENCE:

(1) Right Up, Left Up
(2) Right Down, Left Up
(3) Right Up, Left Up
(4) Right Up, Left Down
(5) Sequence Repeats

NOTE: Raising and lowering speed of the markers is due to the internal orifice in the sequence valve necessary for
proper operation of the valve spool.

EXCESSIVE SPEED CAN CAUSE MARKER DAMAGE.

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CAUTION! Escaping fluid under pressure can ha ve sufficient f orce

to penetrate the skin. Check all hydraulic lines and hoses BEFORE applying
pressure. Fluid escaping from a very small hole can be almost invisib le. Use
paper or cardboard, NOT BODY PARTS, to check for suspected leaks. If
injured, seed medical assistance from a doctor that is familiar with this type
of injury . Foreign fluids in the tissue must be sur gically removed within a fe w
hours or gangrene will result.

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03-01-92

FLAT FOLD MARKER ASSEMBLY

11009