Great Plains CTA4000 HD Operator Manual - Manual (Page 25)

Great Plains Manufacturing, Inc. Preparation and Setup 21
2012-11-28 160-037M
ADC2220/1150 Hydraulic Circuit Connections
The implement has one or two hydraulic circuits (with a
low pressure sump return line). The standard circuit
powers lift, fold and weight-transfer functions, controlled
by a valve block on the right front of the implement. An
optional circuit operates the markers.
Great Plains hydraulic hoses are color coded to help you
hookup hoses to your cart outlets. Hoses that go to the
same remote valve are marked with the same color.
If the tractor has a load-sensing or constant-flow hydraulic
system, the implement must be equipped with an optional
bypass valve to avoid tractor damage. See “Hydraulic Bypass
Kit” on page 59 for ordering.
1. Shut down tractor hydraulics.
2. If optional markers are already installed, connect the
Marker hoses to receptacles
and per
instructions supplied with the markers.
3. Connect the Retract hose of the (blue) Lift/Fold pair
to receptacle
.
Connect the Extend hose of the (blue) Lower/Unfold
pair to receptacle
.
4. Skip receptacles and , not used by this
implement.
5. Connect the sump hose to receptacle .
6. Check hose routing to ensure adequate slack for link
arm movement, and clearance from pinching or
abrading cart/implement components.
Bleeding Hydraulics
To function properly, the hydraulics must be free of air. If
hydraulics have not been bled, they will operate with
jerky, uneven motions and could cause wings to drop
rapidly during folding or unfolding. During initial
implement setup (which may have been done by your
dealer) or if you replace a hydraulic component,
complete the following procedures.
High Pressure Fluid Hazard:
Escaping fluid under pressure can penetrate skin, causing
serious injury. Avoid the hazard by relieving pressure before
disconnecting or “cracking” hydraulic lines. Use a piece of
paper or cardboard, NOT BODY PARTS, to check for leaks.
Wear protective gloves and safety glasses or goggles when
working with hydraulic systems. If an accident occurs, seek
immediate medical attention from a physician familiar with
this type of injury.
Color
Cart
Receptacles
Hydraulic Function
Orange ,
Markers
(also used for
auger on cart)
Blue
Lift, Fold and Weight
Transfer
Lower, Unfold
(not used on cart)
Yellow ,
Not used by implement
(used for fan on cart)
No Color Sump return
A B
C
D
E F
G
26434
A B
C
D
E F
G
Figure 17
Levers for Lift Bleed
26372