GREAT PLAINS PL5700, Operator'S Manual

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Great Plains | 411-681M | 04/08/2021 59
PL5700 Planter Table of Contents Index Maintenance
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Hydraulic System
High Pressure Fluid Hazard
Do not attempt to make hydraulic system
repairs. Great Plains strongly recommends
that all hydraulic system repairs to be
completed by a trained professional who is
knowledgeable about how to safely complete
hydraulic system work. You should only
maintain or adjust your hydraulic system as
described within this manual. Compromising a
closed hydraulic system can cause serious
injury or death.
The hydraulic system is a closed system and will
come from the factory fully charged and bled.
Your planter is equipped with lift and fold hydraulic
cylinders designed with rephasing ports which will
allow for the release of air from the hydraulic system.
See “ Unfolding ” on page 22.
Hydraulic System Inspection
Routine hydraulic maintenance will require
inspection of hydraulic lines, valves, fittings, and
cylinders for any signs of damaged or worn parts,
and the presence of hydraulic fluid. If you discover or
suspect a leak, or damaged or worn parts, contact
your Great Plains dealer for service on your
hydraulic system by a trained professional.

Hydraulic Drive
High Pressure Fluid Hazard
Escaping fluid under pressure can have
sufficient pressure to penetrate the skin. Check
all hydraulic lines and fittings before applying
pressure. Use paper or cardboard, not body
parts, and wear heavy gloves to check for
suspected leaks. If injured, seek immediate
medical attention from a physician familiar with
this type of injury.
Hydraulic Drive Filter
Contamination is the most common cause of
performance problems and premature wear in a
hydraulic drive system. Before each connection is
made, properly clean quick-connect couplers before
you attach the hydraulic hoses to the tractor.
All hydraulic fluid is filtered through the high pressure
filter (1) which contains a replaceable filter element
(2), and it provides protection to the hydraulic
components of the drive if properly maintained.
The high pressure filter (1) is equipped with a
pop-out indicator (5) when the replaceable element
(2) is clogged, and should be changed immediately.
Normal service life of the replaceable element will
vary based on the precautions taken to minimize
contamination at the couplers and route service of
the tractor filtration.
To replace the element:
1. Unscrew the lower filter canister (3) from the filter
(1); catching and disposing of the used fluid.
2. Remove and discard the filter element (2).
3. Install a new filter element (2).
4. Clean the canister threads (4) and lube the
O-ring with hydraulics fluid, then reinstall.
5. Reset the pop-out indicator (5) if necessary.
Keep a filter element (2) on hand. Great Plains
recommends changing the filter element at least
seasonally, or when alerted by the pop-out indicator.

Markers
Marker Shear Bolt
Equipment Damage Risk
Replacing the shear bolt with a higher grade
bolt can result in marker damage.
Do not replace the shear bolt with a lower
grade bolt, or smaller bolt, or you may
experience nuisance shears.
The marker arm is attached to the marker body with
a 7/16 - 14 x 2 Grade 5 shear bolt. If the shear bolt
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