Great-plains YP1220 Operator Manual User Manual download pdf (Page 21)

Great Plains Manufacturing, Inc. Preparation and Setup 17

03/14/2012 401-506M

Hydraulic Charge and Bleed

Normally the hydraulic system is fully charged and bled

at the factory before shipping. If repairs have been made,

substantial amount

s of oil drained from the system, or the following proce-

dures do not correct a problem, see “Bleeding Hydrau-

lics” on page 55.

Lift Hydraulics

Bleeding should not be required other than to raise fully

and hold lever on for one minute or until all cylinders

extend fully. If this does

Cylinder Hydraulics

Bleeding should not be required other than to fold fully

and hold lever on for one minute or until all cylinders

reach the end of their stroke.

Planter Damage Risk:

Do not fold or unfold without ﬁrst raising planter completely.

Leveling Frame Side-to-Side

All frame sections must be level to maintain even plant-

ing depth. Before using the planter in the ﬁeld, follow

these steps to make sure the planter is level side-to-side.

Periodic frame-leveling adjustments should not be nec-

essary, but if you are having problems with uneven

depth, check planter levelness and follow these proce-

dures.

Before making any adjustments be sure the lift cylinders

are re-phased and operating properly.

Complete the steps under “Hydraulic Charge and

Bleed” on page 17, before proceeding.

Note: Level frame in planting conditions. Failure to do so

may result in machinery not producing desired re-

sults.

Refer to Figure 9

1. Unfold the planter fully and set down. Put in ﬁeld

position by lowering and pulling forward.

Figure 9

Base Height

27457

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Great-plains YP1220 Operator Manual User Manual Page 21